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Tractor TDT-55. Review of modifications, characteristics, reviews

The manufacturer of the TDT-55 diesel skidding tractor is the Onega Tractor Plant. The skidding TDT-55 was developed on the basis of the once popular, but already outdated TDT-40 tractor. Onega engineers conducted a series of studies and calculations, and by 1962 the first TDT-55 was assembled, which had to undergo a series of tests before the decision was made to launch a production line of these machines at OTP in 1964.

In 1966, the desired was realized and brand new, reliable in all respects, TDT-55 skidders began to roll off the production line of the enterprise, providing high endurance and increased cross-country ability in the most difficult conditions (including temperature changes from -40 to +40, off-road, work on mountain slopes and movement on marshy soils). According to their characteristics, these vehicles were classified as the third traction class.

Overview of modifications

The production of TDT-55 tracked tractors at the Onega plant continued until 2003, during which time several successful upgrades were made:

• TDT-55
• TDT-55A
• TDT-55-05
• LHT-55
• TB-1

Many of our readers are interested in how much a TDT-55 tracked skidder can cost now? We answer: depending on the year of manufacture, condition and configuration, this tractor can have a price from one to two and a half million rubles. Let's take a closer look at each modification.

TDT-55

The weight of this crawler tractor is 9.6 tons. The skidder is equipped with a diesel four-cylinder power unit of the SMD-14B brand, the rated power of which is 62 hp. With. Five-speed gearbox, 5 forward and reverse speeds.

The tractor is equipped with a PD-10U petrol two-cylinder starter, installed outside the cab and started either manually or using an electric starter. The liquid pre-heater ensured quick start of the engine even in severe frost.

TRANSMISSION

The clutch slips When the pedal is pressed all the way, the clutch does not disengage completely The angular contact bearing of the clutch release gets hot

There is a lot of force on the clutch pedal when disengaged. When shifting gears, you can hear the grinding of gears. When the clutch is engaged or not completely disengaged, it is possible to change gears. Gears do not engage or disengage when the clutch is completely disengaged

Gears switch out spontaneously Knocks are heard in the gearbox The gearbox gets hot

The main gear gets hot When the turn lever is pressed all the way, the tractor turns poorly When the turn lever is squeezed, the diesel engine stalls When the turn lever is fully squeezed, the turn clutch does not disengage completely The turn clutch slips

The tractor pulls to the side. Great forces on the friction clutch levers.

Final drive gets hot Knocking and extraneous noise

WINCH

Knock in the bevel-helical gearbox The winch gets hot When the tractor is moving, the tree pack is not held on the loading shield Heating and oil leakage from the freewheel

The gear clutch turns off spontaneously

ELECTRICAL EQUIPMENT

Alternator malfunction Batteries are not charging Low battery voltage

Light bulbs burn dimly when the engine is not running Gas emissions from the battery when charging Gas emissions from the battery when it is not used

High electrolyte temperature (above 40°)

The battery is “boiling” and requires frequent addition of electrolyte. The lighting lamps do not light up. Wiring and lamps are fine. The fan or windshield wiper does not work

Insufficient illumination from headlights

The lighting lamp is flashing. The lighting lamps are burning with incandescence when the diesel engine is running.

The sound signal does not work. Wiring is OK

HYDRAULIC SYSTEM

The hydraulic booster does not work (there is no pressure in the hydraulic system or it is insufficient)

Great forces on the friction clutch levers and the clutch pedal (the hydraulic system has the required oil pressure)

Control levers do not return to original position

The loading shield and pusher, the body or the rear lifting device are not reset (raised), or these operations are performed slowly and are accompanied in some cases by uneven shocks

Rapid heating of hydraulic oil

Distributor control levers do not automatically return to neutral position Distributor levers do not lock in operating positions

The pump does not create the required pressure

Lots of noise when the pump is running

Review of skidding tractor TDT-55. Model characteristics, video work, reviews

Recommend: 67%

Content

Description

The TDT-55 tractor, on caterpillar tracks, is used for transporting and stacking medium and large trees after they have been felled.

The TDT 55 tractor was developed specifically to perform work in highly complex conditions due to its heavy weight and engine power.

The first skidding tractor TDT 55 was produced in 1966 at the Onezhinsky Tractor Plant. And the last representative of this machine was designed in 2003.

Clutch

In stock: 2 pcs.

In stock: 4 pcs.

In stock: 3 pcs.

In stock: 2 pcs.

In stock: 109 pcs.

In stock: 1 pc.

In stock: 2 pcs.

In stock: 16 pcs.

In stock: 2 pcs.

Design features of TDT 55

The basis of the TDT 55 tractor is a rigid welded frame. It belongs to box type frames. In order to fully protect all parts of the transmission, as well as the engine, the frame is equipped with special sheets. We are talking about folding sheets that are connected to the side members with bolts. They are also connected to the crossbars with bolts.

Despite the high level of resistance to all kinds of contaminants, the tractor frame must be periodically cleaned from both wood residue and dirt.

Tractor frame location TDT 55

The frame with the driver is located on the frame. It is located asymmetrically. The driver not only controls the tractor, but also performs the functions of an attachment operator. Since the cabin is quite well insulated, nothing interferes with the tractor driver while working. The huge glass area allowed the creators of the tractor to achieve an excellent level of visibility. The tractor driver can, without much difficulty, completely control the space around the tractor, so there is no question of any accidents or other incidents.

This model is equipped with a powerful fan as well as a heater. This means that you can work on the TDT 55 both during heat and at fairly low air temperatures, which is especially important for many regions of Russia where sudden temperature changes are observed.

TDT 55 control

Operating the tractor is made extremely simple, because this model is often used in remote areas of the forest. You can find very little electrical equipment in the design, so you definitely won’t have to worry about constant breakdowns.

The movement of this tractor can be controlled using just two levers. They are needed both for braking and turning.

The design also includes several pedals: a pedal for supplying fuel, as well as a pedal for engaging the clutch. They operate quite smoothly, so the tractor driver will not experience any discomfort while operating the TDT 55. You can buy this tractor at a much lower price than its competitors. In addition, spare parts for the TDT 55 also cost very little, and it breaks down extremely rarely.

The engine (diesel) is located directly next to the cabin. Over the years, this model was equipped with different engines, but the most popular are the SMD 14H and SMD 18H-0, although they can no longer be called quite modern. But they are very reliable.

The transmission deserves special attention. This model is equipped with a dry clutch with multiple discs. The clutch has both a hydraulic booster and a front brake, so operating the tractor is extremely easy and simple.

The gearbox is a five-speed gearbox (non-synchronized). It is equipped with a special lock to engage the gear if the clutch pedal is not pressed.

Scope of use of TDT 55

The TDT 55 tractor is used both for skidding and as a baling machine. It is capable of performing all the tasks assigned to it without unnecessary problems, which is why tractor drivers with extensive experience prefer the TDT 55 to many other similar models.

Sometimes it is used for delimbing work, and also as an earth-moving machine.

It is not without reason that it is almost impossible to find on the market another tractor model as reliable and durable as the TDT 55. Prices for spare parts are a separate topic for discussion, because finding them will not be difficult, and even the most economical buyers will appreciate the cost of spare parts.

Versatility and reliability have made the TDT 55 one of the most famous domestic models both in Russia and in the CIS countries.

When is it necessary to replace the electronic gas pedal?

Due to the fact that this is an electronic drive, the main faults in it are related to the electronics. There are two sensors built into the pedal bracket that transmit commands to the control unit. If one of these sensors fails, a light on the panel will light up, which is responsible for the serviceability of the engine control system. In this case, the ECU goes into standby mode (the speed increases much more slowly). If two sensors fail, the emergency mode will turn on and the engine will operate as if idling. Since the sensors cannot be repaired, the electronic gas pedal must be replaced.

The wiring may also be damaged, and then the operation of the throttle will be disrupted. If the electric motor is worn out, then the monitor also displays an error indicating an accident. These damages can be eliminated, but if the accelerator of the electronic gas pedal, which is responsible for the dynamics of the car, fails, then this part should be immediately replaced with a new one. We'll look at how to do this below.

Owner reviews

Here's what TDT 55 tractor owners say on the forums:

Sergii : “I bought this tractor about two years ago. And in all this time I can’t say anything bad. The quality absolutely matches its price. Now this crawler tractor is outdated, and there are more modern models. However, how much do they cost? There have never been any problems with parts and service centers can always be found. It works well on any soil and terrain."

This unpretentious and durable tracked vehicle confidently moves through swamps, forests and slopes. no uneven terrain with difficult terrain will be an obstacle for him. After all, the TDT-55 series skidder was created specifically for forestry, called a logging truck.

Development and release features

For a long time, the plant offered earlier versions of the TDT-55. At the same time, the Onega Tractor Plant offered vehicles ideal for performing various tasks. Active work to improve technical parameters began in the 1960s, as the TDT-40 and its modifications no longer met the requirements.

As a result, the plant designers designed the TDT 55 model, which became conceptually new. In 1962, the vehicle underwent special testing at the state level and began to be successfully used for most events. In addition, since 1964, mass production of the model began, taking into account the requirements of the transport market and the intended functionality. To achieve this, we modernized the design, increased productivity and reliability.

Good old jokes. About medicine.

- Doctor, why do all doctors have such strange handwriting? Is that what you wrote to me? — Obliterating endarteritis, paroxysmal tachycardia, dyscirculatory encephalopathy. - Damn, you talk like you write!

The anesthesiologist is flying on vacation. Suddenly the flight attendant announces: “Is there an anesthesiologist among the passengers?” Make your way to the 12th place quickly. He approaches the indicated place, and there a man pours vodka into shot glasses. - Who are you? - asks the anesthesiologist. - Surgeon. I’m not used to drinking without an anesthesiologist, you know!

Cunning and insidious doctors ask where it hurts, and then press there.

The doctors at the clinic have only two diagnoses: “Well, why bother if you can walk?” and “Where have you been before, dear?”

Our free healthcare starts with paid shoe covers. And paid medicine comes with free shoe covers.

Doctor: - Good news! You will be able to see your wife again. Patient: - But she has been dead for five years. Doctor: - Exactly!

Remember! A good student will become a good doctor. And a bad student becomes the head of a hospital.

Dimensions, weight TDT-55A

When developing the TDT-55A, the designers chose an elastic suspension. The track rollers were installed on small balancers. Those, in turn, were connected to the frame using levers, which were hinged and rested against the bearing of the spark plug spring (the lower part of the frame). All this helped ensure that when the vehicle moved over obstacles, the separation of the road wheels from the tracks was minimal. The drive wheels were made single-rimmed, the guide wheels had one flange.

It is worth mentioning one more feature of the tractor. To improve ride quality and maneuverability, as well as more efficient operation of rear attachments, the chassis suspension has been moved rearward. But at the same time, this solution limited the mass of the front linkages.

Basic faults and repairs

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Many owners note the maintainability of these machines and the interchangeability of parts. There are a large number of photos on the forums about their conversion.

The sequence of basic repair work is given in the operating instructions.

If the engine does not start, here is what could cause this:

Lack of diesel or motor oil; There is dirt in the fuel or air filter; The ignition system has failed; The carburetor is not mixing fuel and air correctly.

If there is excessive vibration coming from your crawler tractor, check the following:

Is there fuel and oil? Are all bolted connections tight? Is the attachment mounted correctly?

Particular attention must be paid to the caterpillars. They are responsible for the movement of the TDT 74 tractor and are subject to heavy loads./p>. Therefore, they should be serviced once every 3 months.

Therefore, they should be serviced once every 3 months.

Repair and maintenance of power steering

The T-40 hydraulic booster maintenance procedure itself includes: searching for and eliminating various oil leaks through gaskets, seals and various connections, adding oil to the required levels and washing the filter elements. Typically, hydraulic booster maintenance is done every 100 engine hours.

Remember! The power steering valve is adjusted at the factory and a seal is installed. The seal can be broken only in case of significant violation of the parameters.

Before adjusting the valve, it is necessary to connect a pressure gauge to the discharge line. We unscrew the plug (10) and place a stop between the bipod and the beam.

Then unscrew the safety valve locknut and cap. We start the engine and set the crankshaft speed to the maximum possible speed. By turning the bipod towards the stop, using the steering wheel, we adjust the oil flow pressure through the valve in the range (80 kgf/cm2 at 10-35°C and 75 kgf/cm2 at temperatures above 35°C). After adjustment, we put everything in place. Remember, with the engine and hydraulic pump running, the steering play should not be more than 20°. If the amount of play is greater, then it is necessary to tighten the connections of the shaft and bipod and check the location of the engagement of the shaft sector with the teeth. If necessary, replace them.

Adjusting the side clearance and engagement of the shaft teeth is done as follows:

1. Unscrew the nut (6), hold the screw (4) and unscrew the lock nut. 2. Screw the screw (4) into the cap 2 turns, then hold it and tighten the locknut and cap.

Changes

The TDT-55 skidder has several popular modifications, including the LHT-55, TDT-55A-05 and TB-1 models.

LHT-55

The model, produced since 1969, is additionally equipped with a rear coupling device, a rear power take-off shaft, and a drop-type metal platform.

TDT-55A-05

The difference between this model was the more powerful (100 horsepower) and more modern D-245L diesel engine. Thanks to its use, it became possible to significantly increase the forward speed. it began to exceed 15 kilometers per hour. And the pressure of the tracks on the ground, on the contrary, became 4 kPa less.

This model is a variant of the TDT-55A. It has neither a load shield nor a winch, but has a rotating lever-type hydraulic manipulator equipped with pliers and a pusher. Phototractor TB-1

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