DIY centrifugal clutch for walk-behind tractor

Being an integral part of the transmission, the walk-behind tractor clutch performs the function of transmitting torque from the engine crankshaft to the gearbox (gearbox shaft). With its help, during gear shifting, the power plant and gearbox are disconnected. Due to this mechanism, the walk-behind tractor or motor-couple starts and stops without turning off the engine.

If the intended design of a factory-made motorcycle does not include a clutch, you can assemble it yourself.

Clutch functions in the design of a walk-behind tractor

Clutch operation is based on the action of a friction clutch. This transmission element performs several important functions, among which stand out:

Uninterrupted transmission of torque;
Suppression of torsional vibrations;
Smooth gear shifting;
Impact-free gear connection;
Connecting and disconnecting a gearbox with an internal combustion engine;
Disconnecting the transmission from the flywheel device.

The clutch device makes it possible to briefly disconnect the engine crankshaft and the power transmission of the machine. Thanks to the clutch, the vehicle starts and stops movement smoothly and without jerking.

Centrifugal clutch - design and advantages

This kind of element is worth highlighting among other designs due to its reliability and durability. It is used in automatic transmissions. Its design consists of the following elements:

Flywheel;
Pulley;
Hubs with locking groove and key;
Flange;
Bushings;
casing;
Bearing;
Retaining ring.

One of the most important roles is played by the differential device associated with the centrifugal clutch. It helps improve vehicle maneuverability and ensure smooth cornering.

Together with the clutch, the differential regulates the rotation of the walk-behind tractor wheels at different speeds. Moreover, the mechanisms that transmit power together act as wheel lockers. In some models of equipment, instead of a differential, a special device is installed that blocks one of the wheels of the walk-behind tractor at the command of the driver.

More modern models of equipment are equipped with a friction clutch. It is mounted between the engine and gearbox. In this design, the driven parts are closely connected to the gearbox input shaft, and the driving parts are closely connected to the engine crankshaft. In most cases, both the driving and driven elements are made in the form of flat round disks, or in the form of a cone. Just like a centrifugal clutch, a friction clutch is activated by manipulating a separate handle.

Transmission

The transmission serves to transmit torque from the engine to the wheels and change the speed and direction of movement of the walk-behind tractor. It usually consists of several units connected in series to each other: gearbox, differential (in some models), clutch, gearbox.

These elements can be structurally made in the form of separate units or combined in one housing. The gearbox is used to change speeds, of which there can be a different number (up to 6 forward and 2 reverse), and at the same time is a gearbox.

By type, transmission units (gearboxes and gearboxes) can be gear, belt, chain, or various combinations of both.

Classic gear transmission, consisting only of cylindrical and bevel gears, is used mainly on heavy walk-behind tractors and some models of medium-sized machines. As a rule, it has a reverse and several lowering steps.

The figure below shows the gear transmission of the Ugra NMB-1 walk-behind tractor, consisting of cylindrical and bevel gears. The engine is rigidly attached to the gearbox, which in turn is rigidly connected to the bevel gear. The design of the NMB-1 walk-behind tractor does not have chain and belt drives, which, according to its developers, are an unreliable link in transmissions due to the tendency to breakage, damage and belt slippage.

Gearbox diagram of the Ugra NMB-1 walk-behind tractor: 1 - Clutch fork, 2 - Retaining ring, 3 - Adjusting ring, 4 - Bearing, 5 - Retaining ring, 6 - Adjusting ring, 7 - Retaining ring, 8 - Cuff, 9 - Retaining ring, 10 - Bearing, 11 - First gear and reverse gear, 12 - Second and third gear, 13 - Adjusting ring, 14 - Bearing, 15 - Driven gear shaft, 16 - Driven gear shaft. Diagram of the angular gearbox of the Ugra NMB-1(N) walk-behind tractor: 1 — Retaining ring, 2 — Adjusting ring, 3 — Bevel gear, 4 — Adjusting rings, 5 — Bearing, 6 — Intermediate gear shaft, 7 — Upper housing, 8 — Output shaft, 9 — Adjusting rings, 10 — Bearing, 11 — Bevel gear, 12 — Retaining ring, 13 — Boot cup, 14 — Boot, 15 — Cuff, 16 — Adjusting rings, 17 — Lower housing, 18 — Adjusting spacer, 19 - Bearing, 21 - Cover, 22 - Gear, 23 - Gear, 24 - Shaft.

The torque from the crankshaft is transmitted to the drive shaft 16 (Gearbox Diagram) of the gearbox and is removed from the bevel gear of the driven shaft 15 by the vertical shaft 6 of the angular gearbox (Angle Gearbox Diagram), which transmits rotation to the hexagonal shaft of the 8 drive wheels.

The design of the gearbox is a mechanical two-way with 3 forward gears and 1 reverse. The transmission has two power take-off shafts (A) and (B).

Gear-worm transmissions, consisting of two gearboxes - an upper gear and a lower worm - are usually used on light walk-behind tractors. The engine crankshaft is vertical. Sometimes cars with a gear-worm transmission are equipped with a centrifugal automatic clutch. This design of the walk-behind tractor ensures increased compactness of the unit.

Belt-gear, belt-chain and belt-gear-chain transmissions are quite common in light and medium-sized walk-behind tractors. The engine rotates the shaft of a gear or chain reducer using a belt drive, which is also a clutch. Gear-chain drives are often implemented in a single crankcase.

In a belt drive, to change the speed of movement of the walk-behind tractor and power take-off, the pulleys may have an additional groove. The advantages of such a transmission include simpler disassembly and assembly of the walk-behind tractor than in the case of a gear transmission.

The figure below shows the V-belt transmission of the GreenField walk-behind tractor model MB-6.5 (with a belt-gear transmission), which, along with transmitting torque and reducing the speed, also performs the functions of a clutch and gearbox (speed shifting).

The clutch function is realized using a tension roller and a control mechanism consisting of a rod and a system of levers that allow you to change the position of the roller, which tensions or loosens the belt and, accordingly, turns on or off the transmission of torque from the engine to the gearbox.

A similar scheme is implemented in the domestic walk-behind tractor Salyut 5, shown in the figure below. The V-belt drive transmits rotation to the gear reducer of the walk-behind tractor.

As a rule, walk-behind tractor transmissions have power take-off shafts that transmit torque to the working parts of the machine. According to their type and location in the transmission, power take-off shafts can be independent, located before the clutch and rotating regardless of its state (disengaged or engaged), or dependent, located after the clutch, and synchronous with a specific gear. One walk-behind tractor can have several power take-off shafts - different in type and rotation speed.

Clutch operating principle

The clutch for a walk-behind tractor consists of several important elements:

Control devices;
Leading element;
Driven parts.

The driving part consists of the end side of the engine flywheel and the pressure plate. The disk rotates together with the attached flywheel. At the same time, the disk can also move axially in relation to the flywheel. Between these two elements there is a driven disk, which is located on the driven shaft. Along the perimeter of the pressure plate there are spring elements in the form of cylinders. The function of springs is based on the compression of the disk they support.

In this case, the other end of the springs is in contact with the casing. Thus, the springs maintain the clutch for the walk-behind tractor in a constantly engaged state.

The control mechanism is made of spin levers connected to the pressure plate housing via rods with a tap and a pedal. When disengaging the clutch, the owner of the walk-behind tractor engages the clutch cable, which transmits force to the spin levers. When the springs are compressed, the levers move the driven disk away from the pressure disk, which leads to the clutch disengaging.

The bearing reduces friction by preventing the fixed link from touching the rotation arms. Most walk-behind tractor models are equipped with three levers located at an angle of 120 degrees relative to each other. With the help of a spring, each clutch lever returns to its original position. In this case, the layer moves to the distance required to turn off the levers. If this distance is not reached, the clutch begins to slip.

How to make a clutch mechanism with your own hands?

The clutch on a walk-behind tractor works on the principle that provides for increased friction of the components, so rapid wear cannot be avoided. In this case, you should try to make the mechanism yourself. The design of a homemade clutch will be composed of:

input shaft of the gearbox and flywheel of the Moskvich car;
hub and steering knuckle from Tavria;
B-profile;
Double groove driven pulley;
Crankshaft from GAZ-69.

Subsequent work on assembling the mechanism looks like this:

First, you will need to grind the crankshaft so that it does not interfere with other elements of the walk-behind tractor;
We place the standard walk-behind tractor hub on the shaft;
Next, you need to machine a place on the shaft for the bearing. This operation should be performed as accurately as possible so that the bearing fits perfectly on the shaft. As a result, the hub should fit without any gaps, and the pulley should rotate;
Then turn the crankshaft over and do the same on the other side;
Next, use a drill with a 5mm drill bit to make 6 holes in the pulley. The distance between them should be the same. Since 10mm bolts will be used, holes will also need to be drilled on the back of the wheel that drives the drive belt;

Next, install the pulley on the flywheel and tighten both parts with a bolt. After this, mark the drill spots on the flywheel so that they coincide with the 6 holes in the pulley;
Remove the pulley and drill holes in the flywheel;
After this, put the pulley back on and securely tighten the structure with bolts;
Grind the inner surface of the crankshaft and flywheel so that they do not hit each other.

The finished structure can be installed in a regular place in the walk-behind tractor. Do not forget to connect the cables, leading them as far as possible from the friction elements.

Engine and support systems

The walk-behind tractor drive is a classic internal combustion engine with all the systems necessary for its operation.
Light and medium-class cars use four-stroke gasoline engines (see about the design and operation of a four-stroke engine). The structure of a four-stroke gasoline engine (Honda) walk-behind tractor: 1 - fuel filters, 2 - crankshaft, 3 - air filter, 4 - part of the ignition system, 5 - cylinder, 6 - valve, 7 - crankshaft bearing.

Most users of walk-behind tractors have to deal with four-stroke air-cooled gasoline engines. These engines have the following systems to ensure their operation:

A fuel supply system designed for preparing the air-fuel mixture, consisting of a fuel tank with a tap, a fuel hose, a carburetor, and an air filter.
A lubrication system that ensures lubrication of rubbing parts.
A starting mechanism (starter) designed to spin the crankshaft. Many engines are equipped with an easy starting mechanism that reduces starting force by using a device on the camshaft that opens the exhaust valve during the compression stroke, thereby reducing compression in the cylinder as the crankshaft spins. Heavy walk-behind tractors are sometimes equipped with electric starters powered by batteries. Some models have electric and manual start. The latter is used as a backup.
A cooling system that removes heat from the engine cylinder block by a flow of air forced by the flywheel impeller as the crankshaft rotates.
An ignition system that ensures uninterrupted sparking at the spark plug. A rotating flywheel with a magnetic shoe induces an emf in the magneto, which is converted by an electronic circuit into electrical signals supplied to the spark plug. As a result, a spark jumps between the contacts of the latter, igniting the air-fuel mixture.

1 - electronic magneto, 2 - screw, 3 - magnetic shoe. Starting mechanism and ignition system of the Cascade MB6 walk-behind tractor: 1 - starter handle, 2 - fan housing, 3 - protective casing, 4 - cylinder, 5 - cylinder head, 6 - magneto, 7 - flywheel.

The gas distribution system is responsible for the timely entry of the air-fuel mixture into the engine cylinder and the release of exhaust gases. The gas distribution system includes a muffler designed for targeted release of exhaust gases and noise reduction.

Let us note that engines are sold with all its systems, and if you have an idea to make a walk-behind tractor with your own hands, then the purchased engine will already have a gas tank, an air filter, a starter, etc., for example here (it’s only better to buy via the Internet store, because in a regular store of this chain the price may be higher).

The figure below shows the Honda GX series engine, model GX200 QX4, widely used in domestically produced walk-behind tractors. The power of the unit is 5.5 hp. It has a horizontal crankshaft and a higher compression ratio, ensuring efficient fuel combustion and low carbon deposits.

Features of the design of the clutch on the walk-behind tractor

The clutch for a walk-behind tractor, as in any other agricultural equipment, consists of the following parts:

direct control node. The spin lever is connected to the pressure disk by a pedal and rods;
master node. The bearing reduces friction; during rotation around its axis, the levers do not touch;
driven components. The spring returns all mechanisms to their original position. The layer is pushed away from the levers to the distance necessary to turn off the equipment.

The clutch design is not very complicated, so you can repair faults yourself if necessary.

Clutch for a mini-tractor - do-it-yourself features

The clutch of a minitractor, or as it is simply called, the clutch, is an essential part of every tractor unit. Mini tractors are no exception, where this part performs a similar function - uniform connection and disconnection of the motor part and the working transmission.

In other words, the clutch of a minitractor takes on the torque of the traction part - the internal combustion engine - and relays it to the transmission.

Among other things, the clutch protects the transmission mechanisms from malfunctions that may occur in the event of a sharp increase or decrease in torque.

Factory equipment that is supplied to the market has a ready-made and well-functioning clutch. When it comes to homemade mini-tractors, this issue has to be resolved independently. Let’s take a closer look at the types of couplings for mini tractors and how and from what they can be assembled with your own hands.

Types of clutch mechanisms for walk-behind tractors

Modern walk-behind tractors differ in their design features. There are different types of clutches that can be equipped with equipment:

friction clutch. This type is in greatest demand among farmers. Such mechanisms are easy to maintain, they can work for a long time without interruption, and have high efficiency;

centrifugal clutch. Long-term slippage and rapid wear of spare parts caused the centrifugal clutch to not receive due recognition;

walk-behind tractor belt clutch. Such a mechanism is not very reliable, has low performance, and wears out quickly when working with powerful engines;
hydraulic clutch. By pressing the pedal, the main piston begins to move. During its rotation, the lubricating fluid is driven. The pressure from the piston is transferred to the connecting rod, the springs automatically restore the piston to the starting position;

disc clutch on walk-behind tractors. All elements of the mechanism are very reliable, allowing you to start the equipment smoothly. There are single-disk and multi-disk equipment with almost the same operating principle.

There are dry, air clutch types and those that operate in a bath filled with engine oil.

Automatic centrifugal dry clutch

An automatic centrifugal clutch is a mechanical device that automatically, at certain engine speeds, using centrifugal forces, connects the input shaft to the clutch housing and transmits torque to a sprocket or pulley, making it possible to organize a smooth launch of the equipment into motion without any additional control drive.

The clutch is configured in such a way that when the engine starts and while it is warming up, there is no engagement with the clutch body, it rotates freely and the mechanism does not work.

This product is widely used in the transmission of small vehicles: snowmobiles, go-karts, scooters, small cars and tractors.

A centrifugal clutch can serve as a drive for starting machine tools, winches and on power take-off shafts.

A centrifugal clutch can protect the internal combustion engine from stopping or sharply reducing speed if the load on the output shaft has increased sharply. The mechanism clutch is turned on and off automatically when a certain shaft rotation speed is reached.

The clutch is installed directly on the crankshaft of the Honda GX (and analogues) internal combustion engine without additional modification, does not require adjustments or maintenance, and has a dismountable design and good maintainability.

For clutches, sprockets are made of ST45 steel with subsequent heat treatment, as a result of which the sprockets can withstand heavy loads and resist wear.

With proper use, the product does not require repair or maintenance for a long time; clutch pad linings are rear brake pad linings for VAZ cars; they have a large margin of safety, can withstand overloads and operate in a wide range of temperature conditions. Using linings from domestic cars makes it possible, having certain skills, to replace them yourself.

Making a clutch for a walk-behind tractor with your own hands

During continuous operation, clutch parts are in constant motion and wear out, so even the most reliable elements wear out over time.
Over time, you will have to buy new spare parts or make everything yourself. Before making a clutch for a walk-behind tractor, you should acquire the following spare parts:

flywheel and input shaft (an old gearbox from a Soviet Moskvich is suitable);
driven pulley with two handles;
a steering knuckle and a working hub (can be taken from a Tavria car);
crankshaft (GAZ-69);
B-profile.

It is worth first considering the drawings of the clutch structure. This will greatly simplify the work.

A homemade clutch is made according to the following scheme:

The crankshaft is ground down until it touches the internal parts of the equipment;
The standard hub is mounted on the shaft;
The place for the bearing is machined on the shaft. The hub is installed without gaps so that the pulley turns smoothly;
The crankshaft is turned over and the same actions are performed on the other side;
Six holes are made at equal distances in the pulley using a drill with a five-millimeter drill bit. Ten-millimeter bolts will be screwed into them;
A pulley is installed above the flywheel, the elements are bolted together. The locations for the holes are marked, taking into account their coincidence with the pre-drilled holes;
The pulley is pulled out and the corresponding holes are drilled in the flywheel;
The inner surface of the flywheel and shaft is machined until the parts no longer touch;
You definitely need a clutch handle for the walk-behind tractor. Take a tube 30 millimeters long and 10 millimeters in diameter, it is attached to a pulley;
The clutch cable for the walk-behind tractor can be taken from an old chainsaw. It is wound onto a reel.

A self-prepared clutch can be installed on the following brands of walk-behind tractors: Agro, Neva MB-2, Cascade.

Manufacturers and estimated prices

Having gained an idea of the technical parameters and capabilities of these units, it is much easier to answer the question of which walk-behind tractor is better to buy. In this case, we can only compare prices in the selected class of these cars.

In the category of light and medium-sized gasoline walk-behind tractors, equipment from domestic and foreign companies competes almost equally.

Among light walk-behind tractors, the Russian brand Salyut is in demand today. Users of this equipment write in their reviews that the best walk-behind tractor from this company is the one with a 4-stroke Japanese gasoline engine with a power of 5 hp, a gear reducer and a V-belt clutch. Its price starts from 31 thousand rubles.

Its competitor, the Neva MB 3C walk-behind tractor (weight 70 kg), is equipped with a 5.7 hp Subaru engine. At a cost of 34 thousand rubles. This unit is optimal for working on personal plots and farm plots.

The cost of medium-sized walk-behind tractors from the French brand Caiman starts at 46 thousand rubles. This is the amount you will have to pay for a 6-horsepower unit with a Robin-Subaru engine. It is equipped with 2 forward and one reverse gears. Its maximum tillage depth is 32 cm with a working width of up to 90 cm.

Motoblock Cayman

Domestic medium-sized walk-behind tractors Neva and Cascade with the same performance characteristics and reliable American Briqqs & Stratton engines will cost a more modest amount - from 34 to 39 thousand rubles. The price tag for a Chinese gasoline Centaur (7 hp), capable of plowing the soil to a depth of 30 cm with a passage width of 100 cm, does not exceed 26 thousand rubles.

In the category of heavy diesel walk-behind tractors, in terms of price-quality ratio, the Scout equipment is a confident middle peasant. Walk-behind tractors with a rototiller from this manufacturer with a capacity of 8 liters. With. (such as 81 D) can be purchased from 59 thousand rubles, more powerful models (101 DE, 15 DE) will cost about 80-85 thousand rubles.

Scout 15 DE

You should also pay attention to the MTZ Belarus brand and the Chinese Zubr. These machines are equipped with Honda and Briqqs&Stratton diesel engines with a power of 9-10 hp, have a disc clutch and a gear reducer.

Four forward and two reverse speeds allow you not only to efficiently plow heavy soil, but also to transport loads on a trailed trolley. The price of such walk-behind tractors starts at 70 thousand rubles.

Motoblock MTZ Belarus

In reviews of heavy Zubr walk-behind tractors, one can find complaints about low quality workmanship, the need to tighten connections before use, and noise during operation. This unit is inferior to the MTZ brand, but at the same time is much cheaper than its Belarusian counterpart (the price of a 12 hp unit is in the range of 42-46 thousand rubles)

Heavy walk-behind tractor Zubr

Which walk-behind tractor is better to choose - technical characteristics

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Do-it-yourself lug lugs for a walk-behind tractor, description, photo

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All about the clutch for a walk-behind tractor

Walk-behind tractors significantly facilitate the work of farmers and owners of their own plots. In this article we will talk about such an important design element of this unit as the clutch.

Purpose and varieties

The clutch carries out inertial transmission of torque from the crankshaft to the transmission gearbox, ensures a smooth start of movement and gear shifting, and regulates the contact of the gearbox with the motor of the walk-behind tractor. If we consider the design features, the clutch mechanisms can be divided into:

friction;
hydraulic;
electromagnetic;
centrifugal;
single, double or multi-disc;
belt

Based on the operating environment, a distinction is made between wet (in an oil bath) and dry mechanisms. According to the switching mode, a permanently closed and non-permanently closed device is divided. Depending on how the torque is transmitted - one flow or two, one- and two-flow systems are distinguished. The design of any clutch mechanism includes the following elements:

control node;
leading parts;
driven components.

The friction clutch is the most popular among farmers who own walk-behind tractors, because it is easy to maintain, highly efficient and lasts for a long period of continuous operation. The principle of operation is the use of friction forces that arise between the contacting edges of the driven and driving parts. The driving components work in rigid connection with the engine crankshaft, and the driven components work with the main shaft of the gearbox or (if it is absent) with the next transmission unit. The elements of the friction system are usually flat discs, but some models of walk-behind tractors have a different shape - shoe or cone.

In a hydraulic system, the moment of motion is transmitted through a fluid, the pressure on which is provided by a piston. The piston returns to its original position using springs. In the electromagnetic type of clutch, a different principle is implemented - the movement of the system elements occurs under the influence of electromagnetism forces.

This type is permanently open. The centrifugal clutch type is used in gearboxes that automatically change gears. Not very common due to rapid wear of parts and long duration of slipping. The disk type, regardless of the number of disks, is based on one principle. It is reliable and ensures smooth startup/shutdown of the unit.

Belt clutches are characterized by low reliability, low efficiency and rapid wear, especially when used with high-power motors.

Couple-uncouple

Transmission. Part 2. Clutch and quickshifter

Text: Artem 'S1LvER' Terekhov

Any motorcycle must be able to disconnect the crankshaft drive from the rear wheel so that the engine can run when the bike is stationary. Despite this obvious statement, imagine this possibility did not always exist.

Many early motorcycles used direct drive via a belt and pulleys on the crankshaft and rear wheel that could not be separated. This drive really worked, but some problems arose during its operation. For example, to stop at an intersection, you had to turn off the engine. And in this case, it was possible to start the bike only from the pusher, which is clearly not the best starting option. The clutch mechanism was designed to ensure that the running engine is decoupled from driving the rear wheel. The second function, no less important, is the ability to select gear ratios on machines that are equipped with a gearbox. Let's see how this mechanism works. Clutch principle Clutch operation is based on friction. In its simplest form, the clutch consists of two discs, one of which is located on the crankshaft journal, and the second is connected through some drive mechanism (chain, belt, gears) to the rear wheel and is pressed against the first disc. If there is a small gap between the disks, the engine runs while the second disk remains motionless. If you connect the disks to each other, the rotation of the crankshaft due to friction will be transmitted to the second disk, and since it is connected to the rear wheel, it will also rotate. So the power supply from the engine to the wheel can be switched on or off as needed. The vast majority of modern production bikes use a manually operated clutch from a lever located on the handlebars. The exception is scooters that use an automatic centrifugal clutch, the operating mode of which depends on engine speed. Our article will focus specifically on the clutch that is used on motorcycles (unfortunately, the format of the article does not allow us to laugh enough at funny stories about scooter riders who switched to motorcycles and try to “brake” with the clutch). How the clutch works The entire clutch assembly is installed on the input shaft of the gearbox (read about the structure of this device in our article). housing or outer drum is mounted on a bearing and can rotate freely and independently of the shaft. The outer clutch drum is directly connected through the forward gear to the crankshaft (although there are also designs in which the clutch is mounted directly on the crankshaft journal; this arrangement is common on motorcycles made by BMW and Moto Guzzi), so that when the crankshaft rotates, it also rotates. The central part of the clutch, or inner drum (hub), is smaller and is located inside the outer drum. It is installed on the input shaft of the gearbox and is secured against rotation by splines, so that when the inner drum rotates, the input shaft also rotates.

Section of a multi-plate clutch in an oil bath, Yamaha R6 2008

The clutch discs are located in the space between the outer and inner drums. Two types of discs are used: smooth and friction. They are arranged alternately, and the exact number of discs depends on the type of clutch and the machine on which it is used. On the outer circumference of the friction discs there are rectangular splines that are installed in the grooves of the outer clutch drum. On the inner circumference of the smooth discs, teeth are cut, which are installed in the grooves of the inner clutch drum. In the normal position (when the bike is in motion), the friction and smooth plates are held in direct contact by springs acting on a plate called the pressure plate . When the crankshaft and outer clutch drum rotate, due to the friction that occurs between the plates, the inner clutch drum, and therefore the transmission input shaft, also rotates. When the rider squeezes the clutch lever, the cable or hydraulic mechanism, counteracting the force of the springs, pushes the pressure plate away from the pack of smooth and friction plates, causing the discs to no longer touch. By eliminating direct contact between the discs, friction is reduced, allowing the outer drum to rotate freely relative to the inner drum. As the rider releases the clutch lever, the discs are pressed against each other again, and gradually the rotation of the outer clutch drum due to friction begins to be transferred to the inner drum, thus gradually transmitting torque to the gearbox and further to the rear wheel; this eliminates the possibility of stopping or jerking (of course, if you do everything correctly and release the clutch smoothly). The ability of the clutch to transmit torque depends on many factors: the number and diameter of the discs, the force of the springs compressing them, and the coefficient of friction between the discs. All other things being equal, smaller machines require fewer disks than large, powerful machines. Likewise, if the torque is the same, then by increasing the diameter of the disks their number can be reduced. Friction discs (who would have thought?) have friction material applied to them, while smooth discs are made of steel.

2007 Honda CBR1000RR Clutch Components

Design matters When choosing the type of clutch to be installed on a particular motorcycle, several determining factors influence the designer's decision. First, let's look at the number of disks. A multi-plate clutch uses more than one set of smooth and friction discs, usually seven or eight, and sometimes nine friction discs are used. There are always one fewer smooth discs compared to friction discs, since the disc package is always limited on both sides by friction discs. On most monoblock engines (that is, those in which all transmission components are located within the engine crankcase) with a transverse crankshaft in the frame, a multi-plate clutch is used. The reason for this is the small clutch diameter. A multi-disc clutch is also much lighter than a single-disc clutch, although it has a larger friction surface and strength. Single- or double-plate clutches are used on motorcycles with a longitudinal crankshaft in the frame (for example, Moto Guzzi bikes with a V-twin, the cylinders of which are located across the frame). The clutch is mounted on the rear journal of the crankshaft and has a separate housing between the engine and gearbox. Because of this arrangement, the clutch does not need to be compact, and with large diameters only one or two discs are needed. The next question that designers decide is to use a dry clutch or one operating in an oil bath.

Ducati 749 dry clutch on display (covered in stock, of course)

It may seem strange that a mechanism whose principle is based on friction should operate in oil; but there are several important reasons for this. The oil acts as a heat dissipator to prevent the clutch from burning. In addition, it serves as a lubricant for the bushings or bearings on which the outer clutch drum rotates, and also facilitates the movement of splines and disc teeth. An additional “bonus” of an oil bath clutch is that to ensure lubrication of the front gear, you do not need to seal the clutch in a separate chamber. You can’t go against physics - naturally, the friction provided between the clutch discs operating in an oil bath is lower than the friction between the dry clutch discs. Therefore, large-diameter disks or a larger number of them are required (or perhaps both), which leads to increased dimensions.

Suzuki RGV250 equipped with dry clutch

The same RGV250, but with an oil bath clutch

This is why dry clutches are mainly used on sports bikes. High efficiency and low weight (no need to pour oil) are an integral part of a dry clutch. However, the same as a small resource. Most racing machines are equipped with a dry clutch, as are almost all civilian Ducati sportbikes (except for the 848, but there is a separate one for it). Japanese manufacturers mainly use oil bath clutches. From a practical point of view, a “wet” clutch looks preferable - a much longer service life and less tendency to overheat. On the other hand, if the goal is maximum performance in a race, then the choice will be in favor of a dry clutch.

Nothing is broken here, this chirping sound is the sound of a working dry Ducati clutch

Another point that the designer must decide is how the force from the lever will be transmitted to the clutch drive mechanism. Most often, a cable is chosen for this purpose, otherwise a mechanical clutch drive . Cables are subject to stretching and wear, and require adjustment and lubrication, but are easy to maintain and repair. The mechanical drive is simple - the cable acts on the clutch through a drive mechanism located inside the clutch cover or on the opposite side of the crankcase, while the mechanism acts on a long pusher passing through the input shaft of the gearbox. The hydraulic clutch drive mechanism is used mainly on large-volume machines. It costs much more and requires careful maintenance, but the shortcomings are more than offset by the smoothness and ease of its operation. The hydraulic drive operates on the same principle as the front brake system (we will also talk about brake systems in due course): when the lever presses on the master cylinder plunger, it acts on the hydraulic fluid and forces it into the hose. The fluid then pushes the piston of the working cylinder, which acts on a pushrod located inside the input shaft. Other than regularly checking the fluid level, the hydraulic system requires little to no maintenance, although fluid and seals must be replaced periodically to keep it functioning properly. Also, the design of any hydraulic system implies that the fluid is prone to absorbing water and becoming saturated with air (in short, servicing the hydraulic clutch is similar in care to servicing the brake system). With that out of the way, let's move on to more modern and high-tech stuff. I think that while reading reviews of modern motorcycles, you have repeatedly come across the phrase “slipper clutch.” As a rule, the presence of it on the motorcycle being tested delights the tester, which he immediately reports. However, no one really explains how this thing works. Let's start with this. Slippery type The slipper mechanism in the clutch (hereinafter referred to as PS for simplicity) is a development aimed at high-performance motorcycles. The main goal for the PS is to limit the reverse torque that appears when braking the engine from high speed or when changing to lower gears. For the first time, the PS was used on a drag bike of the 70s under the name Hogslayer - a non-trivial clutch for that time allowed the “Pig Killer” to accelerate to 290 km/h without slipping or overheating (in addition, two 880 cc injection engines contributed to this maximum speed from Norton, but that's a completely different story...). Among modern production motorcycles, the slipper clutch has also found its place - mainly, it is equipped with sportbikes, as well as charged factory street bikes.

Slipper clutch for Ducati 999 from FBF

Now let’s take a closer look at why PS is used in general. When the gas is opened, the rear wheel is driven through the clutch. When the throttle is closed and the bike continues to move at a speed higher than the set limit corresponding to the current throttle opening, the rear wheel is still turning the engine shaft through the clutch; but because the engine offers a lot of drag (due to compression, especially at high speeds and lower gears), it is possible to reach a point where the drag, or back-torque, of the engine exceeds the rear tire's coefficient of adhesion. The result of this is a locked rear wheel. This outcome is especially likely in rainy conditions, because... in the rain, the coefficient of adhesion between the tire and the road is greatly reduced, and the weight redistribution that occurs during sudden braking reduces the load on the rear axle. PS is installed in order to eliminate the possibility of wheel locking due to clutch slipping when changing the direction of torque transmission. However, the PS does not disengage the clutch completely, and the engine braking effect remains. Different manufacturers approach the design of the clutch in different ways, but most often slippage is ensured by the following mechanism: the inner clutch drum is located on a series of ratchet stops with an inclined surface. When the direction of torque transmission changes, the inner clutch drum moves on the ratchet stops, thereby retracting the pressure plate and relieving pressure on the discs. This approach was commercially tested for the first time on the Kawasaki ZXR 750.

2007 Kawasaki ZX-6R Slipper Clutch - Standard

Aprilia engineers took a more complex and technological path when designing the RSV Mille clutch. To move the inner clutch drum, a servomotor is used, which is controlled by a vacuum supplied from the engine intake manifold. When the throttle is closed, the increased vacuum in the manifold creates a vacuum in the air line of the servomotor, which shifts the inner clutch drum and relieves pressure on the discs. This approach is no longer used anywhere except RSV; manufacturers prefer a simpler option, tested on the ZXR 750 (each company tries to bring something different to the PS design, but the general principle remains very similar to the Kawasaki version). Whatever one may say, despite its simplicity, the slipping mechanism in the clutch is a very, very useful thing. If your motorcycle is not equipped with PS, do not despair, it is likely that a tuning kit for it exists in nature, you just need to look for it. Quickshifter Finally, we got to the long-awaited topic - the Translogic quickshifter systems, also known as BMW Quickshifter. Contrary to the sensational statements of the German company about the new super technology, such systems of “quick gear shifting without the rider releasing the clutch”, produced by some tuning companies, the most famous of which are Translogic and Dynojet, have long been used by participants in the World Superbike, Supermoto/MX and even go-karts It's just that BMW was the first company to decide to install this system in some production bikes.

The advantage of the mechanism is inherent in its very name: “quick” - “fast”, “shift” - “shift, displacement, switching”. That is, “quickshifter” literally translates as “quick switch”. How quickly do the gears change, you ask? The answer can be found in the example given on the official Translogic page. “The most professional motorcycle racer takes at least 340 milliseconds to change gear, while Translogic systems require 48 to 150 milliseconds.” Impressive, isn't it? Another technology that came down from the Olympus of big-time motorsport and became accessible to “mere mortal” motorcyclists.

DynoJet QuickShifter Kit

Now let’s look at the “quick click” device. The key elements of the entire mechanism: a pressure sensor (monitors the pressure on the gear shift foot; simply put, it determines whether the rider presses it or not) and a quickshifter rod (if the standard one does not fit). Some manufacturers (for example, Dynojet) also offer a quickshifter on/off button that can be mounted on the steering wheel. The sensor is connected to an external ignition control module (for example, Power Commander). When the rider puts pressure on the gear shift paw, the sensor sends a signal to the ignition control module, after which it instructs the ECU to temporarily turn off the ignition (for a few tens of milliseconds). When the engine is turned off, switching occurs - without releasing the gas or squeezing the clutch. In the case of BMW motorcycles, there is no need to buy an ignition control unit - the quickshifter is connected to the original “brains”, nothing needs to be adjusted or installed. Usually a quickshifter is installed when they want to improve the acceleration dynamics of the device, but nothing prevents you from shifting down in the same way when braking.

*****

I hope that by reading this article you have made some further progress in understanding what a motorcycle is. However, a lot of ironclad questions have not yet been solved, so stay tuned, there are many interesting topics for discussion ahead!

Clutch adjustment

It should be noted that when working, you must follow certain recommendations in order to avoid premature breakdowns and unnecessary problems that arise due to improper handling of equipment. The clutch pedal must be pressed and released smoothly, without sudden movements. Otherwise, the engine may simply stall, then you will need to spend extra time and effort to start it again. When operating a walk-behind tractor, the following problems related to the clutch mechanism are possible.

When the clutch is fully depressed, the vehicle begins to accelerate sharply. In this situation, try simply tightening the adjusting screw.
The clutch pedal is released, but the unit does not move or does not move at sufficient speed. Slightly loosen the adjustment screw and test the movement of the motorcycle.

If there are strange noises, crackling sounds, or knocking noises coming from the gearbox area, stop the unit immediately. The most common reasons for this situation are considered to be low oil level or poor quality. Before you start working on the walk-behind tractor, be sure to check the presence and quantity of oil. Replace/add oil fluid and start the unit. If the noise does not stop, stop the walk-behind tractor and invite a specialist to inspect your equipment.

If you have problems with shifting gears, test the clutch and adjust it. Then inspect the gearbox for worn parts and check the shafts - the splines may have worn out.

Electronic clutch - manual transmission works like an automatic transmission

Glad to see you on the pages of my blog! Well, since we’re already here, let’s spend time usefully and find out what an electronic clutch is.

To be more precise - electronic control of clutch engagement and disengagement. We know two types of such control, cable and hydraulic. And as we see, the inventors went further and came up with an electronic one.

Technical solutions

A manual transmission is the most common type of transmission in passenger cars in Europe. That is why manufacturers are constantly improving and modernizing it. mechanics One of these progressive developments is the electronic clutch, which replaced the cable, hydraulics and generally removed the mechanical connection between the drive and the clutch pedal, replacing them with electronics. We’ll talk about it today, in particular about the principle of operation and very useful additional functions.

Electronic Clutch System or eCS for short is a promising development by Bosch Corporation. According to the manufacturer? eCS brings the manual transmission closer to the automatic transmission. True, unlike a robotic gearbox, in the eClutch system only the clutch drive operates in automatic mode. But this innovation significantly simplified the operation of the manual transmission and made it possible to save fuel. This clutch also makes it possible to install a manual gearbox on hybrid cars.

It is somewhat unfortunate to note that there is not much information about eClutch. Trade secret, however. But like any electronic system there are: input devices, a control unit, an actuator. The first include the clutch pedal and input sensors. At the moment, only two of them are known: the gas pedal position sensor and the gearshift lever position sensor. It is clear that there are more of these elements in nature.

As for the control unit, its task is to receive and process signals coming from input devices and control the actuator and at the same time interact with the engine control system. The actuator is an electro-hydraulic actuator (drive), which, upon command from the control unit, moves the clutch fork.

Useful features

The creation of the Electronic Clutch System helped to implement several functions at once:

optimize the mode of intensive starts and stops;
make gear shifting smooth;
obtain controlled coasting motion;
expanded the capabilities of the Stop-Start system.

Surely the most important component is comfortable movement with frequent starts and stops. This mode is found in city traffic jams and queues at checkpoints. It makes it possible to drive in first gear without using the clutch pedal - if you take your foot off the gas pedal, the system will disengage the clutch itself. And if you then slow down, the engine will not stall, because it will no longer be connected to the transmission. Moving will happen if you release the brake pedal. Everything is exactly the same as in an automatic transmission, but only in first gear.

Smoothness is everything

It also ensures smooth switching (synchronization) of all gears. The sensor detects the moment of gear change and sends a signal not only to the eCS, but also to the engine management system, which increases or decreases the speed to achieve a smooth shift.

Controlled coasting

The last two functions help save fuel. According to the developers' estimates, its consumption can be reduced by 10 percent. Coasting control eliminates engine braking and helps take full advantage of the vehicle's momentum. This is especially true when driving downhill. In reality, everything happens simply - when you take your foot off the accelerator pedal, the eClutch system disengages the clutch and the car continues to coast.

Improved Stop-Start

On cars equipped with the Stop-Start option, eClutch provides additional fuel savings. Since taking your foot off the accelerator pedal in first gear, you not only disconnect the engine from the transmission, but also turn it off. That is, a complete stop of the car comes with the engine already turned off. As a result, engine operating time is reduced and fuel is saved accordingly.

How to make your own clutch for a walk-behind tractor

Auto mechanic, specializes in agricultural equipment

Without high-quality clutch operation, full operation of the walk-behind tractor is impossible. The clutch is an essential component of the transmission, the function of which is to transmit torque from the crankshaft to change gears and disconnect the gearbox from the power plant during gear changes. The clutch of the walk-behind tractor is necessary for its smooth starting and stopping without the need to turn off the engine.

Car manual clutch

1 Automatic
2 Double
3 Wet
4 Summing up

What is a car clutch? In short, it is one of the most important parts of the transmission. When changing gears, it is the clutch that takes the brunt of the impact.

Its task is to stop the vibrations that result from changing gears, as well as to protect the car from possible overloads. The clutch can be standard (the one that is always installed on cars) or manual.

Clutch device

With all the variety of brands of walk-behind tractors, their classes and modifications, the clutch device always includes several necessary parts:

control unit;
leading component;
driven components.

The control unit includes direct control release levers connected to the pressure plate using rods and a lift equipped with a pedal. When the operator turns off the device, power is transmitted from the pedal to the levers using a tap equipped with a bearing. When the springs are compressed, the levers associated with the pressure plate move it away from the driven one, which causes the clutch to disengage.

The presence of a bearing in the design is designed to minimize the friction factor, since the lift and the levers do not touch. The standard design has three levers that are mounted relative to each other at an angle of 120 degrees. The presence of springs ensures that the device parts return to their original position. The offset shifts by the distance required to disengage the mechanism, and compliance with it is very important: if the required distance cannot be achieved, this leads to the clutch slipping and the friction linings being subjected to increased load and premature wear. Moreover, if the distance, on the contrary, is exceeded, the clutch does not completely disengage.

In this video you will learn how to change the clutch:

The driving component consists of the end of the engine flywheel and the pressure plate that simultaneously rotates with it. At the same time, the disk moves along the axis relative to it. Between these two components is another disk, the hub of which is located on a splined shaft. This is the driven part of the device. Around the drive plate there are cylindrical springs that have pre-compression and are necessary to press the pressure plate. This is achieved due to the fact that one end rests against the disk, and the other is located on the casing located on the driven surface. It is this design that ensures that the device is always on, even in the absence of movement and the engine is not turned off.

Enabling the device to stop generates a signal transmission to the release levers and simultaneous disabling of the driven part, due to which the clutch is disengaged.

Typically, the clutch design of small agricultural machinery units contains a bearing necessary to reduce friction. Its presence ensures smooth movement of the levers with the exception of their contact with each other. The device also contains a spring, which ensures that the control element returns to its original position after switching speeds.

Do-It-Yourself Clutch for Lifan Engine

Modern car market The Lifan Solano, recently shown in the CIS countries, was able to win the trust of many drivers. This is due to the low price, ease of operation and maintenance of the car, as well as its safety and good appearance.

This is not a luxury car and it is designed for “ordinary” people, so you identify and fix all the problems, create repairs, and you make the drivers yourself.

Clutch obstacles. These are variations that appear in the image of round cars that have traveled no more than a thousand kilometers, but in fact they are new cars. To know what's broken, in other words, it's not working properly, you need to know the "symptoms" of a bad clutch. If not every time, if the car’s transmissions do not turn off, then this is specifically to blame, read more in the article: Why transfers to Lifana Solano do not decrease.

This is what a new clutch disc looks like

The main reasons for failure of clutch structural parts are:

Inaccurate driver behavior while driving. pressing the clutch while the car is moving, etc.
It could be a faulty machine with a previously faulty part, non-original components, etc.
Throughout, its life and details are of course easy to carry, especially with the dial control. with careful movement, it is destroyed within 100 thousand kilometers, and for lovers of “high speeds” even faster.
Due to wear or damage to the gearbox or engine oil, the friction linings on the driven disc are sometimes lubricated with oil.

Functions of the centrifugal clutch

There are several types of mechanism, but the most interesting in the context of the operation of household agricultural units is the centrifugal clutch for a walk-behind tractor - it is this kind of automatic clutch that is used in the power systems of walk-behind tractors and cultivators.

The operation of this type of device is based on a friction clutch. The functions of a centrifugal clutch for a walk-behind tractor include such important tasks as:

stable torque transmission;
reduction of vibrations resulting from the movement of parts of the structure;
smoothness in gear shifting;
the ability to connect gears without impact;
turning the gearbox on and off;
disconnecting the transmission from the flywheel.

The presence of a clutch allows the crankshaft to be temporarily disconnected. An engine equipped with this device starts and stops without sudden movements.

This mechanism performs one of the main functions

Centrifugal (dry) clutch (25 mm, sprocket, general purpose)

This centrifugal (dry) clutch is used for Lifan/Honda type engines with a 25 mm output shaft.

This coupling model uses a sprocket for a standard IZh chain with a pitch of 15.875 (chain not included).

Production - Russia.

Today is Saturday, but that's no problem!

You can place an order through the “Add to cart” button or ask a question in the chat (the chat is working).

Description

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Answers on questions

The operating principle of an automatic clutch is based on centrifugal force, which presses the friction material of the movable disk of the device against its casing. The centrifugal clutch allows you to temporarily, at the moment of starting the engine, disconnect the power transmission of the motorized towing vehicle, cart or walk-behind tractor and the engine crankshaft. The start of automatic clutch activation depends on engine speed and lies in the range of 1800-2000 rpm . Engine idle speed (if we take HONDA analogs) is in the range of 1500-1700 rpm.

Clutch moment

Common Questions

Transport companies we work with

For large and medium-sized cities of the European part of Russia

For small loads (spare parts) - relatively cheap (250 - 400 rubles).

For medium loads (sheep clippers, for example) - somewhat more expensive than PEK. However, this can be a profitable option if you live in a place where there is only a post office.

Large goods (engines, walk-behind tractors, generators) - the post office simply will not accept them!

We would like to draw your attention separately

— we DO NOT work with Russian Post via cash on delivery. Payment only in advance!

What do we need to send?

In order to arrange delivery we need the following information:

Last name, first name and patronymic of the recipient
Main phone
Spare phone (if available)
Series, number and date of issue of a driver's license, passport or other identification document ( for TC PEK and Baikal Service
)

We understand some people's concerns—not everyone wants to give out so much information about themselves. Unfortunately, this data is required by the transport companies PEK and Baikal Service themselves.

Before handing over the goods to you at the point of delivery, they will compare the details of your document with those declared. If they do not match, then you will not be given the cargo, even if the full name is the same (because the full name of different people can be the same!).

There's absolutely nothing to be afraid of here

- This is standard practice for all transport companies.
Knowing 3 numbers from your passport or license, you can’t do
even if you want to.

The consignee (individual) must present an identification document, the details of which were declared by the consignor when handing over the cargo to the Forwarder.

When do we ship only with prepayment?

I want to order, but I have doubts

If you are afraid to pay for the goods right away, then in most cases we have payment upon receipt

. But in some cases, payment upon receipt is impossible, and people are afraid to pay right away. We will try to dispel fears.

What kind of store are we?

We are a large online store with main warehouses in Saratov (8E Ufimtseva St.).

We have been making instruments since 2005. You can check this on the independent website Rusprofile for our legal entity ( see registration date

Over all this time, we have sold a lot of goods throughout Russia. Therefore, there are many reviews about us on the Internet on Reformal, 2GIS and Yandex.

Our site receives approximately 50,000 visits each month and approximately 12,000 unique visitors per month. You can check this on an independent website.

We are the official dealer

such famous brands as Lifan, Loncin, Brait, Forza and Daman.
We also have products under our own brand
- wood splitters, motorized oars and swamp vehicles.

Reviews about us

We have been working for 15 years, which means there are many reviews about us that you can read:

Reviews on our website (Reformal review platform, independent of us)
2Gis (4.8 / 5)
Yandex (4.6 / 5)

Will there be a warranty card and a receipt?

Of course they will!

We issue an official warranty card

on the company letterhead, fill it out according to all the rules. With our warranty card, you can contact not only us, but also any other service that works with the desired brand.

If you paid for the goods in advance, a purchase receipt will arrive along with the goods.

If you pay upon receipt, a receipt will be given to you at the collection point after payment.

Our legal details

Name:

Individual Entrepreneur Salakhutdinov Ruslan Ravilievich

OGRNIP:

305645302500017, assigned: 01/25/2005

Taxpayer Identification Number:

645300481095

Official dealer certificates

What if something happens?

What if the goods are damaged by the transport company?

According to our statistics, goods are damaged in some way by transport companies in approximately 1 case out of 500 (0.2% of shipments). This is a very rare situation, but possible.

In this situation, we are completely on the client's side

. Have you arrived home, unpacked the goods and realized that something was wrong with the transport company? Write to us - we will send you the spare part for our money. In case of fatal damage, we will take the goods back without any problems at our expense.

If you have the patience to read all the reviews about us, you will find confirmation of our words.

What if the product breaks during warranty?

It's not a problem at all

. All big brands (like Brait) have authorized service centers in all major cities of Russia. We always prepare the documents correctly and fill out the warranty card - so there will be no problems.

And of course, you can always write to us in chat.

We have our own service support and direct contact with all manufacturers.

If you are from Saratov, then you can be served in our own service. It is located in the same place as our warehouses - st. Ufimtseva 8E.

Payment for orders

How can I pay when purchasing from a warehouse?

Cash
Regular or credit card

Is it possible to pay upon receipt at the delivery point of the transport company?

TC PEC, TC KIT and SDEK have the option of payment upon receipt. Usually, it is possible to pay in cash and by card, but in 1% of points of issue it is not possible to pay by card

(in small towns).

Therefore, if possible, it is better to take cash. If you have a credit card and there is no way to cash out, then you can call your point of issue and find out if they accept cards (we will tell you the phone number).

We ship goods only upon prepayment

Via Russian Post
If the purchase amount is less than 2000 rubles
To the Far East, Eastern Siberia, the Far North, Kaliningrad and Belarus
If the shipping cost is too high relative to the value of the product (for example, for carts)
The company reserves the right to refuse to send goods via cash on delivery

I need to pay for the goods immediately. What are the guarantees that he will come?

Sometimes payment upon receipt is not possible - there are no necessary transport companies in the client’s city or the order amount is too small to send by cash on delivery. Then the goods (and in the case of Russian Post, delivery) must be paid for immediately

Then many clients have a question: I will pay for the goods, but what guarantees are there that you are not scammers?

There are a lot of reviews about us on the Internet: on Reformal, on 2GIS and on Yandex.
Our website contains all legal information about us. You can check it by following the link to Rusprofile. As you can see for yourself, we have been working since 2005
.
We are the official dealer of many famous brands: Lifan, Loncin, Brait, Forza, Daman. Not every store can boast of this.
As you yourself have probably noticed, our site is not a template site at all, made using a website builder for a couple of thousand rubles. We created it for ourselves and, like any unique development, the site was very expensive. Would scammers invest so much?

If you are still in doubt, we can email you a delivery agreement to an individual with a signature and seal

Installment plan without overpayments

We have installment plans without interest and overpayments through Tinkoff Bank and Post Bank.

Are there really no overpayments?

An installment plan is the same as a bank loan, we (the store) just pay all the interest for you. You pay only the amount for the product itself, divided by the number of months for which you took the installment plan (4 or 6 months).

How can I apply for an installment plan?

On the product page - in the block under the price and delivery information there will be a button “In installments for . ". Click on this button.

The installment selection window will open. At the moment there are two options - Tinkoff Bank or Post Bank. A detailed description of installment plans through each bank will be in this window.

When you choose where you would like to take out the installment plan, click on the green “Select” button at the bottom of this window. A new window will open where you will need to fill in information about you.

Just try it - it's really not difficult!

A little about installments through Tinkoff Bank

Ideal for cities with a population of 300 thousand or more or Tinkoff Bank clients.

Fill out all the information required for installment payments directly on our website. After a few minutes, the bank gives an answer - whether it can give you an installment plan or not.

If the installment plan is approved, it must be signed. Online signing (via SMS) is available for Tinkoff Bank clients. If you are not a Tinkoff Bank client, they will call you within a day and arrange a meeting to sign documents. They usually meet in a convenient public place, such as a shopping center, and can often even come to your home.

A little about installments through Post Bank

Ideal option for small towns.

Fill out a short application form on our website for installment plans through Post Bank. During the day, they call you back from Post Bank, clarify (if necessary) the remaining data and tell you the result of the installment plan (whether they are ready to issue it or not).

If the installment plan is approved for you, you must sign it. This can be done at the nearest branch of Post Bank or Russian Post.

Installment plans may not be approved?

Yes, sure. An installment plan is the same as a loan, we (the store) just pay the interest for you. But for the bank there is still a risk that you will not pay the “body” of the installment plan - which means they will not issue installment plans to everyone.

This depends on salary, credit history and current credit load.

My installment plan was not approved, what should I do?

Try placing an order through the Shares service (see below). In this case, you will have to pay 25% of the order value immediately, and the next 25% every 2 weeks.

Yes, this will result in an installment plan for a shorter amount of time and there is a down payment.

But approval is 99%, everything is completely online, without signing documents.

Payment through the service in Shares

The Shares service is a new service from Tinkoff Bank for instant installment plans without signing documents.

How it works?

You pay 25% of the total order price immediately (online). Then, every 25% every 2 weeks. In total, the installment plan is 1.5 months.

Unlike regular installments, with Shares you do not need to sign any documents. Your passport details are not required, only your full name and telephone number. 99% approval. Registration takes a minute.

Principle of operation

The centrifugal clutch has undeniable advantages such as reliability and long service life. This design is used in automatic transmissions. This device consists of a standard set of components:

flywheel;
pulley;
a hub equipped with a stopper groove and a key;
flange;
sleeve;
casing;
bearing;
retaining ring.

Due to the connection of the differential with the centrifugal clutch, control of the unit is facilitated, its maneuverability and smooth turns are improved. In addition, the differential regulates the speed of rotation of the wheels and participates in their blocking. Some models of walk-behind tractors use special blockers that allow you to stop one wheel independently of the other.

Modern units can be equipped with mechanisms of various designs. There are several types of these mechanisms:

frictional - easy to maintain and capable of working for a long time without pauses with high efficiency;
centrifugal - has the disadvantage of rapid wear of parts of industrial mechanisms;
belt - does not have high reliability and performance, quickly breaks down on powerful power plants;
hydraulic - by pressing the pedal, it sets into motion a piston, the rotation of which imparts movement to the lubricating fluid; the force is transmitted from the piston to the connecting rod, and the springs return it to its original position;
disk - characterized by high reliability of parts and smooth start-up; There are single-disc and multi-disc mechanisms that operate on the same principle.

Homemade centrifugal clutch

For one reason or another, it may be necessary to assemble a homemade clutch for a walk-behind tractor. This task is quite real, but before you begin, you need to understand the features of the device.

The principle of operation of any type of clutch is the continuous friction of its components. And this naturally leads to parts wearing out and the device becoming unusable. Undoubtedly, the easiest way out in this situation is to buy a new mechanism, but the main disadvantage of this solution is its cost. The finished part is quite expensive, and this is the main reason why many owners of walk-behind tractors make the clutch for the walk-behind tractor with their own hands.

Making a clutch mechanism with your own hands

Assembly of the device is preceded by two necessary steps: studying the drawings and selecting parts. The drawing should be as clear as possible, and all components indicated on it should have full size markings and indications of their places in the device.

To make a homemade mechanism, you need the following parts:

input shaft and flywheel (for example, the corresponding parts from the Moskvich gearbox of previous decades are suitable);
driven pulley (two handles must be installed on it at the preliminary stage of selecting parts);
a working hub and a rotating metal knuckle (the best option is from a Tavria car);
B-profile;
crankshaft from a GAZ-69 car.

After the set of necessary parts is formed, assembly begins. The order of steps is as follows:

Carefully grind the shaft so that after processing it does not come into contact with other parts that will be installed on the device.
Install the walk-behind tractor hub onto the prepared shaft.
Determine the location on the shaft where the bearings will be installed. Grind these places. After completing this stage of work, the hub should fit exactly, there should be no gaps, and the driven pulley should rotate easily, without touching anything.
Drill six holes of equal diameter no more than 5 mm in the pulley at equal distances from each other. A 10mm long bolt will be installed in each hole, which requires holes on the other side of the pulley as well.
Using a bolt, secure the pulley above the flywheel. Mark the holes that should coincide with the holes in the pulley.
Remove the pulley and make holes according to the markings.
Process the shaft and flywheel in such a way that after grooving they do not touch.
Make a walk-behind tractor clutch handle. To do this, you can take a pipe 3 cm long and 1 cm in diameter. As a result of assembly, you will need to fix it on a pulley.
Prepare the clutch cable for the walk-behind tractor. For this part, you can buy a suitable cord and wind it on a reel. As an option, you can use a clutch cable for a walk-behind tractor, made from a chainsaw cable that has a working reel.

A ready-made clutch made for a walk-behind tractor with your own hands is well suited, for example, for the Argo and Neva MB-2 walk-behind tractors. Users note that this mechanism is of good quality and quite durable.

Clutch for a mini tractor - types, features, manufacturing

A clutch for a mini tractor is an essential element of any agricultural machine. The main function of this important unit is to maintain the connection between the motor part and the drive train, as well as to disconnect these two elements from each other. In other words, the clutch receives torque from the engine and transmits it to the transmission mechanism.

All mini tractors entering the market are necessarily equipped with a ready-made and properly adjusted clutch. It's another matter when you need to make a clutch for a homemade mini tractor. In this case, it is necessary to study the varieties of these mechanisms for a mini tractor, as well as the design features of individual types.

Based on the element that transmits torque from the internal combustion engine to the mini tractor gearbox, the following types of couplings are distinguished:

friction - most often, factory models of mini tractors are equipped with these types of components. They consist of a driving and driven part, as well as a control system. The revolutions created by the crankshaft of the internal combustion engine are transmitted through the drive and driven parts. The performance of clutch components directly depends on the frictional properties of the materials from which they are made. If necessary, this indicator of the driving and driven parts of the mechanism can be increased by using various linings designed to reduce the friction force in any necessary direction;
hydraulic - the operation of clutches of this type is based on the force created by the flow of working fluid. Subsequently, it is the working fluid that acts on the driven part of the mini tractor. If the flow force is stable throughout the entire period of operation of the mini tractor, it is called a hydrostatic clutch. If the flow force is variable, then such a coupling is called hydrodynamic. The latter type has become widespread in the design of most modern mini tractors. Such units are subject to less wear and are characterized by more stable operation of the traction device. Most often, hydraulic couplings are used in cases where a seeder, mower and harrow for a mini tractor are regularly used on the farm;
electromagnetic - in the design of couplings of this type, the connection between the motor and transmission of a minitractor is ensured by a magnetic field, less often by a special powder with magnetic properties. Both the magnetic field and the powder are designed to activate the driving force and close the created magnetic field between the parts of the device.

Depending on the nature of the planes rubbing against each other, couplings can be of the following types:

dry – able to function without lubricant;
wet - work only in oil bath conditions.

Based on the number of disks provided in the design, the following types of structures are distinguished:

single-disc;
multi-disc.

The main part of a multi-disk device is the housing, inside of which there is a notched surface. Disks with grooves located along the outer circumference are inserted into it. During operation, they rotate around their axis without obstacles, and alternately transmit the torque generated by the engine from the engine flywheel to the transmission elements.

How to make a clutch for a mini tractor with your own hands?

This question is asked by many farmers who own homemade mini tractors. Before answering it, you should figure out which mechanism is easiest to assemble. There are 2 types of structures that have the simplest design: belt and multi-disc, operating in an oil bath.

The V-belt unit, like other types of units, also consists of driven and main parts. Pulleys act as driven parts.

To assemble the belt coupling you will need:

2 belts, at least 14 cm long. They will play the role of forward and reverse gear;
spring-type rollers – responsible for optimal belt tension;
2 guide strips with the same dimensions as the pulley parameters,
guide plate made of thick, durable steel.

The procedure for assembling the clutch belt is as follows:

First, the crankshaft of the minitractor motor must be equipped with a 3-groove pulley - it will take on the function of the leading link in the design of a homemade unit;
The second pulley will need to be installed on the input shaft of the transmission gearbox - this will serve as the basis for the manufacture of the driven clutch mechanism;
When assembling, you should adhere to the following rule: the pulleys located closest to the mini tractor engine must be positioned strictly parallel to each other;
The spring-loaded bracket must be equipped with rollers responsible for tensioning the belts, or, if necessary, loosening them;
Next, the reverse gear belt will need to be equipped with a special guide, the role of which is assigned to a steel plate. The belt drive itself must be connected on its opposite side to a roller and pulley;
Finally, guide bars must be installed on the rollers and rear pulley. Thus, they must go around the homemade structure on each side. The video will tell you in more detail how a homemade belt clutch works.

A self-assembled clutch is reliable and resistant to vibrations created by the engine. At the same time, such a clutch is the cheapest way to manufacture a clutch mechanism.

Features of multi-disc clutch assembly

Homemade mini tractors, in which the engine is located in a transverse plane, are best equipped with multi-disc clutches placed in oil baths. A special feature of this clutch is the combination of its elements with the starting device of the mini tractor. Thus, when the clutch operates, its parts are lubricated with oil in parallel with the motor elements.

Making a multi-disc clutch for a mini tractor is best done in this order:

First you need to find an old, but fully functional clutch from an IZH or Planet motorcycle;
Next, you need to take the sprocket from the motorcycle and connect it to the drum located in the outer plane of the clutch;
After this, the clutch drive drum must be equipped with a ratchet;
As a rule, the driven discs in a motorcycle clutch design are slightly larger than the driving discs. They need to be installed on the same shaft on which the main ones are installed. In this case, the driven disks must move freely;
At the end, the entire resulting structure will need to be securely fastened with nuts.

It should be remembered that the driving clutch discs are connected to the outer drum by protrusions, while the driven discs are connected to it by teeth. To avoid errors when assembling disks, you should first install the main master disk, and then the slave disk. All further disks must be arranged in the same order.

Finally, you will need to install a pressure disk, which is necessary to tighten the multi-plate clutch structure with springs. The homemade design must also be equipped with friction linings installed on the clutch drive discs. They can be made from cork or plastic.

There is always oil between the discs. Due to this, the leading and driven elements will not be triggered immediately. This will make the mini tractor start smoother and eliminate slipping.

As a result, the homemade clutch for a mini tractor should look like the one shown in the image.

To avoid mounting friction parts, lubricant must flow into the multi-plate clutch continuously and in full. If it is missing, you can use kerosene to lubricate the clutch.

The only drawback of a homemade multi-plate clutch is the need for an oil environment, which can complicate the repair of a homemade unit. However, a multi-plate clutch has increased reliability and is many times superior to all other types of clutches in terms of wear resistance and durability.

Adjustment

For the mechanism to function properly, it is important that it is adjusted correctly. If a particular part is not operational, this is noticeable by characteristic signs and is adjusted in accordance with them:

if the unit breaks away when the clutch is fully depressed, the adjustment is made using an adjusting bolt, which needs to be tightened;
if the operator has completely released the clutch, but the intended speed is not achieved or the walk-behind tractor does not move at all, the adjusting bolt should be loosened;
if the operation of the unit is accompanied by an uncharacteristic sound, it is necessary to turn off the engine and check the oil level; if there is enough oil, it is advisable to contact a service center;
If difficulties arise when changing gears, you should check the condition of the shaft splines and gearbox parts.

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