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Specifications

Description and technical characteristics of Buran-640:

Dimensional data

Overall dimensions of the Buran ADE snowmobile track:

• length - 2.87 m;
• width - 0.38 m;
• height - 0.075 m.

Vehicle dimensions: 2.7 * 0.91 * 1.33 m, weight - 285 kg.

Box dimensions

Buran 4TD is equipped with boxes whose size is 2.42 * 1.06 * 1.13 m.

Suspension

There is an elliptic spring front suspension and an independent rear suspension equipped with a balanced spring.

The travel of the front and rear mechanisms is 5 cm. The number of front springs is 1.

The snowmobile suspension design includes the following elements:

• bearing shell;
• outer hub;
• star;
• internal type hub;
• shaft;
• mounting bolts and nuts;
• sleeve;
• video clip;
• ski;
• axial device;
• clamp;
• buffer;
• steering column;
• cuff;
• thrust washer;
• sprocket driven type of chain drive;
• retaining ring.

The spring assemblies are attached to the ski sole brackets. The ends of the root sheet should be secured with cotter pins. The longitudinal movement of the springs is carried out by sliding along the bronze liner of the front tip of the main leaf.

The bearings, pin and guide axis of the handle must be treated with special lubricant.

Mover

This snowmobile is equipped with a caterpillar drive unit equipped with drive-type sprockets. Number of track mechanisms - 2. Type of track - reinforced with plastic rods, made of rubber and fabric. The tension mechanism is screw, the height of the lug devices is 17.5 mm.

The propulsion unit converts the energy of the power unit through interaction with the environment. The traction force is created by rewinding the caterpillar tracks.

The large contact area of ​​the tracked belt device with the soil makes it possible to ensure low ground pressure and a high level of maneuverability.

The propulsion device includes the following mechanisms:

• drive wheel;
• caterpillars;
• track rollers;
• support rollers;
• tension mechanism with sloths.

This mechanism allows you to increase maneuverability and extend the life of the vehicle.

Transmission

This snowmobile has a transmission in the form of a variator and gearbox. The variator consists of a V-belt drive with automatic change in the working diameter of the drive shaft of the Buran snowmobile track.

The variator design includes:

• a drive pulley equipped with a centrifugal regulating device;
• driven pulley equipped with a cam-type clutch.

The gearbox consists of:

• crankcase;
• reverse shaft;
• gear shift devices;
• chain tensioner.

The gear shift mechanism is installed on the housing cover and consists of an axle device, a shift fork, and a spring-loaded ball that fits into the groove of the axle. A plastic plug with a venting hole is screwed into the lid.

The tensioner is located at the bottom of the housing. The tension is adjusted by turning the tension shaft. To check the chain, the design includes a special inspection ring.

Brakes

The snowmobile is equipped with mechanically driven disc brakes. The design of the brake system includes the following mechanisms:

• main brake cylinder block;
• vacuum type amplifier;
• a device that regulates pressure in the rear brake mechanism;
• ABS unit;
• working brake cylindrical elements;
• working circuits.

The main brake cylinder converts the traction force, which is transmitted from the brake pedal, into fuel fluid pressure in the system and distributes it across all operating circuits.

In order to increase the force that creates pressure, a vacuum hydraulic drive booster is needed.

The regulating device reduces the pressure level in the brake drive of the rear wheel elements, which makes it possible to increase the braking efficiency of vehicles.

The circuits consist of closed pipelines that connect the main cylinders and wheels.

Operating Parameters

Overview of operating parameters:

Basic equipment

The basic package includes:

• starter;
• reverse type transmission;
• heated handles;
• windshield;
• rear towbar;
• speedometer;
• odometer.

Lighting engineering

This modification of the snowmobile is equipped with projector headlights model 17.3711010. They consist of a body, a bezel and an optical device. The lamp is attached to the optical mechanism using a spring latch. There are 3 pins that are needed to connect the plug connector. Using screws, you can adjust the headlights in a horizontal or vertical position.

The rear light is located on the rear suspension housing, to which it is attached with two screws. The design of the lantern includes: base, lamp, socket, glass.

There are 2 safety devices on the vehicle: 15 A and 30 A. They are designed to protect the electrical circuit of the ignition system and engine.

The brake light is located on the steering handle. It turns on the snowmobile handbrake lamp by closing the switch contacts.

Engine

The Buran RMZ-640 snowmobile engine has the following technical indicators:

Some models are equipped with a Lifan engine for the Buran snowmobile. Technical indicators:

What is the fuel consumption at idle?

To find out the fuel consumption at idle, you need to divide the consumption per 100 km by 10. Thus, a 635 cc engine. cm with a flow rate of 25 liters will consume 2.5 liters per hour at idle, whereas the engine has 725 cc. cm (it has a flow rate of 18 l), this figure is 1.8 l even with a higher working volume. The second method of calculation is as follows: you need to take a small container and pour fuel into it.

Then you need to connect the fuel hose to the fuel line so that the fuel is drawn from the container and not from the gas tank. Wait about an hour and measure the amount of fuel remaining in the container. This way you can calculate the fuel consumption per hour at idle speed.

Repairs and breakdowns

Main malfunctions and ways to eliminate them:

1. If the engine does not start, it is necessary to disconnect the ends of the fuel pipe and bleed the system, wash all filter elements, clean the vent hole, and replace gasoline.
2. If there is no spark at the spark plug electrodes, you should check the mechanism for damage and defects, clean the spark plugs from carbon deposits, and adjust the gap.
3. If the gearbox chain breaks, it is recommended to replace the chain mechanism; to do this, you will need to remove the track.
4. If the gearbox turns off while driving, the entire mechanism should be disassembled, the spring and other worn parts should be replaced.
5. If oil fluid leaks from the gearbox, it is necessary to adjust the cuffs and replace damaged and worn parts.
6. If the snowmobile does not develop full power, it is recommended that the track belt tension and alignment be adjusted.
7. If leakage occurs through the shaft seals, they must be replaced.

Brakes:

With this, everything is going just fine with this machine, since one swivel ski, combined with a fairly short longitudinal base of the equipment, allows you to maneuver in rather cramped conditions, for example, to go around trees in forest areas. The manufacturer has made some changes to the appearance of the hood, as well as to its mounting scheme, which, when tilted, provides full access to all the necessary components and assemblies of the engine.

Tuning

Tuning Buran 4TD involves improving the main components and mechanisms. You can additionally install attachments that will not only increase some of the technical performance of the vehicle, but also help increase its service life.

Tuning makes it possible to protect the suspension mechanism and transmission from premature wear.

Improving the motor will allow the equipment to start even at low ambient temperatures. If you install heated handles and seats, you can increase the walking time in cold weather.

In order to use transport in areas with a lot of snow, it is recommended to install an extended ski model.

Installing a roof rack helps improve safety when colliding with an obstacle or during a vehicle rollover.

A cover on the steering mechanism will help soften impacts in accidental collisions, and installing additional rear-view mirrors will help expand the viewing angle.

Description of the snowmobile "Buran" A/AE © Buran adade

• so it is)) Mikhail_lsv

Video

The standard equipment of the Buran 4T and Buran 4TD models is equipped with an electric start system for the power plant. The Buran 4TD model differs from the first modified version by an elongated platform, which is precisely indicated in the name of the machine by the letter D. The Buran 4TD snowmobile has a spotlight and a long base with a special platform for transporting various cargoes. There are also a couple of fuel cans and various tackle and accessories, both fishing and hunting. A model with a short wheelbase is capable of towing a trailer with a load weighing up to 250 kilograms, while the extended version is designed for a towed load weighing up to 500 kilograms. This allows the snowmobile to be used as a tractor.

Also, this snowmobile is an ideal option for performing various business tasks, as it has such advantages as engine efficiency and the ability to tow quite massive loads on a sled in the most difficult off-road conditions.

In 2015, the manufacturer slightly updated the snowmobile, namely adding a new right-hand steering unit, which has an extended plastic throttle lever and a new throttle cable with a nylon insert. This was done to make throttle control even easier and smoother. The steering wheel is heated as standard, which provides comfortable conditions when operating in rather harsh conditions.

If we compare the Buran 4TD snowmobile with its previous models, the following qualities immediately stand out:

Basic equipment:

The snowmobile is often used by professional hunters and fishermen, as well as those who work in harsh conditions, again due to the reliability of the machine and the availability both in terms of search and in terms of the cost of the necessary spare parts. The exhaust system was also slightly modified, namely the pipe was modified, and the muffler mount was moved to the frame of the car.

Handling Buran 4t4td

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Repairs and breakdowns • After folding the trunk, access to the main components of the snowmobile opens.