DIY repair of the front axle drive MTZ 82

Today we will consider a set of components and assemblies of the Belarus MTZ-82 tractor that support its frontal part - the front axle. We will consider its scheme and principle of operation, as well as the technical aspects of its connection. At the end of the article, we will show you the main points of repair and dismantling of the front drive axle.

We will study this mechanism completely, but first you need to fully understand the circuit and device of this mechanism. To do this, we will give its complete diagram and give an explanation of the details.

The main task of the front axle of the Belarus MTZ-82 tractor is to transfer torque from the engine to the guiding front wheels. The mechanism itself consists of: transmission, front differential and wheel reduction gear.

The transmission structure is made up of two helical bevel gears. The pinion gear (37) is mounted on a tapered roller bearing (40) in a sleeve (39). The driven one (25) fits into the belt of the differential housing (27) and the splines, with the help of the nut (24) it is fixed against any axial movements.

This mechanism uses a limited slip limited slip differential. The cover (31) and the housing (27) are bolted together, they contain semi-axial gears (21), a satellite (30, driven friction discs (36) and driving (28), as well as pressure cups (35).

The differential holds the two axle shafts in one piece, and also eliminates separate wheel slip and significantly increases the tractive power of the tractor. When it is turned on, the wheels are locked.
Strengthening from the axles passes to the satellites, which is transmitted by the shoulder cups (35). This in turn compresses the friction discs (26 and 36).

The differential is locked by friction.

If the frictional force in the discs (26 and 28) exceeds the standard deviation at the moment of turning, then slipping occurs. The MTZ-82 front axle differential is placed in the cover (20) and housing (34) on tapered roller bearings (32).

Additionally, a breather (33) is installed in the system, which maintains normal pressure in the differential cavity.

How the tractor's front axle is connected

With the help of hollow axles (58) and a bar, the bridge will be connected, in turn, the hollow axles provide rolling of the front wheels and the axle in the transverse plane. Locking of the axes from movement occurs with the help of strips (59).

Mechanical gearboxes of final drives are placed in the sleeves of the cover (20) and the one-piece body (34). They consist of pairs of bevel gears that serve as hinges of equal angular velocities.

Splined shanks with gears hold the axle shaft and vertical differential shaft. The semi-axle of the tractor itself is mounted on two tapered roller-type bearings (14), and the vertical shaft rests on them and its installation goes into the bore of the pivot pipe (13). Cuffs (16 and 45), together with a paronite gasket, seal the cavity (19) along cover surface.

The pivot tube (13) is supported by a coil spring (49). The pipe itself enters the sleeve (47), it is also pressed into the gear housing (53) and locked with a pin.

The process itself is quite simple to understand, first there is a rotation of the disc flange (2) on a roller-type bearing (50) and a pair of tapered ones (4), which are pressed into the glass (6), which is located in the bore of the cover (1).

The gear wheel (52) and bearing are secured against axial movement by means of two bolts and a washer.
Sealing of the lower conical pair is carried out using a rubber ring, which is placed in the glass (6), as well as a lip and paronite gasket along the plane of the body cover (53).
A swivel arm with trapezium steering rods and wheel fender brackets is attached to the gear housing. The transmission of torque occurs to the disc flange (2) from the semi-axial gear of the differential (21), using the gears of the lower and upper bevel pair.

We will consider the repair in several stages, depending on those signs. Which can be observed. Each stage will be illustrated with detailed pictures.

If traces of grease appear on the propeller shaft flange and the main gear housing, this is the first sign that the loss of elasticity will be lost and the cuffs of the main gear will collapse.
To do this, replace the oil seal and disconnect the propeller shaft. First, unscrew the castellated nut and remove the cardan flange. Next, we unscrew the bolts securing the glass, the bearings of the main gear and two mounting bolts. After that, the drive gear is pressed in from the glass and the cage with the cuff itself is removed as an assembly.

If traces of oil are found on the inner surface of the wheel rim or on the disc flange, this is a sign of the destruction of the wheel axle. To do this, you need to remove the wheel and the gearbox of the final drive in a complete assembly (see the layout diagram of the parts of the final drive gearbox of the MTZ-82 tractor).

then it is necessary to unscrew the two fastening bolts of the radial bearing and remove the driven gear.

So we examined the main problems of the front axle of the MTZ-82 tractor. We hope this article was useful to you.

Consider the following typical drive axle malfunctions - "wheel jamming", "increased noise in the tractor axle housing", "overheating of the main gear bearing cup", "a large amount of metal particles was found in the oil drained from the axle housing." In this situation, the bearings of the drive gear of the main gear or differential have become unusable, have worn out their resource. In addition, such malfunctions occur when the teeth of the bevel gears of the main drive are chipped or chipped.

What happens when parts of the differential or locking mechanism fail? Noises and knocks in the bridge housing when turning MTZ are significantly increased, when cornering, both wheel axles are interlocked or there is no wheel blocking when slipping.

What work is done to identify the causes of failures and troubleshoot the main gear and differential? Firstly, you need to lift the tractor by the front axle, then remove the main gear by installing it on special supports. Further, diagnostics of its parts is carried out. The assembly crowbar, turning the driven gear, diagnoses the parts of the differential, the relative position of which, among other things, is shown in Fig. 2.4.29.

Rice. 2.4.29. Mutual arrangement of body parts, cover and differential of the front leading tractor MTZ:
1 - axis; 2 - case; 3 - shims; 4 - plug; 5 - bearing; 6 - a cage of oil seals; 7 - cuffs; 8, 10 - covers; 9 - worm; 11 - left differential box; 12 - driven disk; 13 - leading disk; 14 - cup; 15 - gear wheel; 16 - satellite; 17 - axis of satellites; 18 - right differential box; 19 - driven gear; 20 - nut

It happens that the diagnosis reveals damage or wear of the differential parts. In addition, sometimes it becomes necessary to replace the final drive gear. In this case, you cannot do without removing the differential (Fig. 2.4.30).

How to remove the MTZ-82 differential? To remove it, first unscrew the bolts tightening the boxes. We remember and know (and if we don’t know, then we take note) that it is undesirable to disassemble and change the relative position of the differential boxes. For this purpose, at first, their disconnections are compared with the digital markings on the outer surfaces. If it faded or disappeared, restore it (Fig. 2.4.31-2.4.33).

After the differential is assembled and placed in the axle housing, it is the turn to check the axial movement of the driven gear of the main drive (clearance in the differential bearings).When the gear is shifted in the axial direction, the values ​​displayed on the indicator should be within 0.01-0.10 mm.

The next step is to adjust the axial clearance in the bearings of the main gear (Fig. 2.4.34) and differential. Then the main gear is placed in the bridge housing. At the final stage, they look and, if necessary, correct the lateral clearance between the teeth of the bevel gears (Fig. 2.4.35).

Rice. 2.4.30. How to remove the main gear and differential of the MTZ tractor:
1 - main gear;
2 - differential;
3 - case

Rice. 2.4.H1. Correct mutual arrangement of the MTZ tractor differential boxes:
1 - digital marking

Rice. 2.4.32. Pressing the differential bearing of the MTZ tractor:
1 - bearing;
2 - driven gear;
3 - two-blade puller

Rice. 2.4.33. Pressing the driven gear wheel of the MTZ tractor differential:
1 - differential box;
2 - driven gear;
3 - two-blade puller

Rice. 2.1.34. How to measure the axial clearance in the bearings of the main gear of the MTZ tractor:
1 - driving gear;
2 - indicator

Rice. 2.4.35. How to check the side clearance between the teeth of the main transmission of the MTZ tractor:
1 - cardan flange;
2 - indicator;
3 - indicator stand

The lateral clearance is adjusted by the number of spacers placed under the bearing cup of the final drive. If you remove several spacers, then the gap between the gears decreases, and if added, it increases.

When carrying out repair work, changing faulty parts, you need to control those surfaces that can wear out more than others.

Dimensions of parts of the drive axle of the MTZ-82 tractor, mm

The appearance of traces of grease on the propeller shaft flange and the main gear housing indicates a loss of elasticity or destruction of the drive gear sleeve.

When replacing the cuff of the main gear drive gear, disconnect the propeller shaft, unscrew the castle nut and remove the propeller shaft flange. Then the bolts of the main gear bearing cup are unscrewed and with two mounting bolts they are pressed out of the axle housing. After that, the drive gear is pressed out of the glass and the cage assembly with the cuff is removed (Fig. 2.4.20—2.4.22).

Rice. 2.4.20. Mutual arrangement of parts of the main drive of the driving axle:
1 - driving gear;
2, 5 - bearings;
3 - shims;
4 - glass;
6 - cuff;
7 - oil seal holder;
8 - flange;
9 - nut

Rice. 2.4.21. Pressing out the gland holder assembly with the cuff:
1 - gland holder;
2 - glass;
3 - two-blade puller

Rice. 2.4.22. Pressing the inner race of the bearing from the drive gear:
1 - bearing;
2 - driving gear;
3 - two-blade puller

Traces of oil on the inner surface of the wheel rim or disc flange indicate destruction of the wheel axle seal.

To remove the cup of cuffs, first remove the wheel and final drive gear assembly (Fig. 2.4.23, 2.4.24). Then the two bolts of the radial bearing are unscrewed, the driven gear is removed and the wheel flange is pressed out (Fig. 2.4.25, 2.4.26). The cup of cuffs and the cup of the outer bearing cage are pressed out using two mounting bolts (Fig. 2.4.27, 2.4.28).

Rice. 2.4.24. Mutual arrangement of the final drive gearbox parts:
1 - flange; 2 - mud sump; 3 - stuffing box body; 4 - cuff; 5, 9, 13, 17, 20, 27, 29, 36 - bearings; 6, 23, 31, 38, 40 - gaskets; 7 - glass; 8, 32 - rings; 10, 26 - shims; 11.22, 39 - covers; 12, 37 - gears; 14 - washer; 15 - plastane; 16 - nut; 18 - shaft; 19 - semi-axis; 21 - an adjusting ring; 24, 34 - buildings; 25 - cuff; 28 - spring; 30 - king pin pipe; 33 - lever; 35 pin; 41 - sleeve

Rice. 2.4.23. Removing the wheel and final drive reduction gear:
1 - wheel;
2 - gearbox mounting bolts;
3 - final drive reducer

Rice. 2.4.25. Removing the final drive assembly cover:
1 - gear cover;
2 - gearbox housing

Rice. 2.4.26. Removing the driven gear:
1 - driven gear;
2 - gear cover;
3 - bearing

Rice. 2.4.27. Pressing the cuff body:
1 - cuff body;
2 - mud sump;
3 - technological bolt;
5 - gear cover

Rice. 2.4.28. Pressing the bearing cup:
1 - bearing glass;
2 - gearbox housing;
3 - technological bolts;
4 - bolt

Heating of the housing of the upper bevel pair of the wheel reducer and the absence of lubrication in it indicate wear or destruction of the vertical shaft seal.

A decrease in the suspension compression stroke, a decrease in its stiffness indicate a loss of spring elasticity. Difficulty turning the steering wheel when cornering (with a working power steering) indicates a failure of the thrust bearings or seized telescopic suspension joints.

To replace the suspension parts, it is enough to remove the wheel reducer. When replacing the sleeve of the kingpin, special pullers are used. In the process of disassembly, the defective parts are replaced and the most worn surfaces are monitored, guided by the data below.

Dimensions of suspension parts of the drive axle of the MTZ-82 tractor, mm

Inner diameter of the king pin sleeve for the pipe:

The outer diameter of the vertical shaft pipe under the sleeve:

Wheel jam, increased noise in the axle housing, excessive heating of the main drive bearing cup, a large amount of metal particles in the oil drained from the axle housing, indicate destruction or extreme wear of the bearings of the main gear drive gear or differential, chips or chipping of the teeth of the main gear bevel gears transmission.

Noises and knocks in the axle body that intensify when turning the tractor, the interlocking of both wheel axles when cornering, the absence of wheel locking during slipping indicate the failure of the parts of the differential or the locking mechanism.

To eliminate failures and malfunctions of the main gear and differential, the front axle is hung, installed on stands and the main gear is removed. Then an external examination of its parts is carried out and, turning the driven gear with a mounting crowbar, inspection of the differential parts (Fig. 2.4.29).

Rice. 2.4.29. Mutual arrangement of body parts, cover and front drive axle differential:
1 - axis; 2 - case; 3 - shims; 4 - plug; 5 - bearing; 6 - a cage of oil seals; 7 - cuffs; 8, 10 - covers; 9 - worm; 11 - left differential box; 12 - driven disk; 13 - leading disk; 14 - cup; 15 - gear wheel; 16 - satellite; 17 - axis of satellites; 18 - right differential box; 19 - driven gear; 20 - nut

If during the inspection breakdowns or wear of the parts of the differential are found, as well as if it is necessary to notice the gears of the main gear, proceed to the removal of the differential (Fig. 2.4.30).

To disassemble the differential, the bolts tightening the boxes are unscrewed; it should be borne in mind that it is not recommended to dismantle and change the relative position of the differential boxes. Therefore, before disconnecting them, check the digital marking on the outer surfaces and, if necessary, restore it (Fig. 2.4.31-2.4.33).

After assembling and installing the differential in the axle housing, check the axial movement of the driven gear of the main drive (clearance in the differential bearings). When moving the gear in the axial direction, the indicator readings should be within 0.01-0.10 mm.

Next, adjust the axial clearance in the bearings of the main gear (Fig. 2.4.34) and differential, and the main gear is installed in the axle housing. Then check and, if necessary, adjust the lateral clearance between the teeth of the bevel gears (Fig. 2.4.35).

Rice. 2.4.30. Removing the main gear and differential:
1 - main gear;
2 - differential;
3 - case

Rice. 2.4.H1. Correct positioning of differential boxes:
1 - digital marking

Rice. 2.4.32. Differential bearing crimping:
1 - bearing;
2 - driven gear;
3 - two-blade puller

Rice. 2.4.33. Crimping the differential driven gear:
1 - differential box;
2 - driven gear;
3 - two-blade puller

Rice. 2.1.34. Measurement of the axial clearance in the bearings of the main drive pinion:
1 - driving gear;
2 - indicator

Rice. 2.4.35.Checking the side play between the teeth of the final drive:
1 - cardan flange;
2 - indicator;
3 - indicator stand

The lateral clearance is adjusted by changing the thickness of the package of gaskets located under the bearing cup of the main gear. When you remove some of the spacers, the gap between the gears decreases, when you add spacers, it increases.

During the disassembly process, the defective parts are replaced and those surfaces that are subject to the most intense wear are monitored.

Dimensions of parts of the drive axle of the MTZ-82 tractor, mm

The front drive axle MTZ-82 is one of the most important tractor units. And its replacement imposes additional costs for the owner of the MTZ-82 tractor. The cost of the new MTZ-82 front axle is up to 100 thousand rubles. How to reduce such expenses? Very simple! It is necessary to carry out repairs and maintenance of the MTZ-82 front axle in accordance with the instructions and recommendations of the equipment manufacturer. In this note, we will define the main points to which you should pay attention when repairing and maintaining MTZ-82 front axles.

Description of the front axle MTZ-82

The front drive axle on the MTZ-82 tractor is of a portal type, that is, the beam is not coaxial with the wheels. This is done in order to provide the necessary agrotechnical clearance for inter-row cultivation of tall row crops. The MTZ-82 front axle is installed in the opening of the front beam of the tractor half-frame.

The half-axle housings of the wheel reducers are telescopically connected to the hoses of the RVD of the MTZ-82 front axle, which makes it possible to steplessly adjust the track of the front driving wheels within the same limits as the rear ones. The MTZ-82 front axle differential is self-locking. Its blocking is triggered automatically when the MTZ-82 front axle is turned on.

The MTZ-82 front drive axle is driven by a gearbox through a transfer case and a cardan gear with an intermediate support. The mechanism for controlling the operation of the MTZ-82 front axle allows you to set the transfer case to automatic and forced switching modes, as well as to completely turn off the front axle, which can be done in transport operations to reduce fuel consumption and tire wear.

A frictional safety clutch is introduced into the MTZ-82 front axle drive, which is mounted in the intermediate support of the cardan transmission. The clutch prevents damage to the drive in cases of short-term overloads of the MTZ-82 front axle.

Front axle device MTZ-82

Front axle diagram MTZ-82

1, 11, 12, 16 - tapered roller bearings; 2 - wheel flange shaft seals; 3 - cylindrical roller bearing; 4- driven gear wheel of the lower bevel pair; 5 - driven gear wheel of the upper bevel pair; 6, 22- drive gear; 7, 17 - double tapered bearings; V - main gear housing; 9 - cuffs of the drive gear shaft seal; 10 - led the leading six; 13 - semiaxis gear; 14 - satellites; 15 - driven gear wheel of the main transfer; 8-Pipe-pin; 19 - sleeve; 20 - suspension spring; 21 - ball bearings; 23 - axle of swing of the bridge; 24 - axis of satellites

The front driving axle MTZ-82 consists of the following parts:

Driving gear assembly 52-2302010

Front drive axle assy 72-2300020-A

Reducer left 72-2308005-08

Reducer right 72-2308010-07

Driven gear 52-2302019

Dowel pin D01-015

Adjusting washer B = 0.5 mm 52-2303027

Adjusting gasket B = 0.2mm 52-2303028

Cage with oil seal, assy 52-2301040-B1

Oil seal holder 52-2301062-B1

Adjusting washer B = 0.5 mm 52-2302021

Adjusting gasket B = 0.2 mm 52-2302022

The main malfunctions of the MTZ-82 front axle

The MTZ-82 front axle, like any mechanism, can fail at any time. Among the main malfunctions of the MTZ-82 front axle, we will single out: constant increased noise during operation, oil leakage and noise, knocking while driving, especially when cornering.There are also such malfunctions as the fact that the MTZ-82 front axle does not automatically turn on when the wheels slip when the tractor is forward, or traces of grease appear on the propeller shaft flange and the main gear housing of the MTZ-80, MTZ-82 tractor due to the loss of elasticity, or destruction of the drive gear sleeve.

Constant increased noise during the operation of the front axle

If the differential bearings are incorrectly adjusted or simply worn out, incorrectly adjusted, damaged or worn out gears, gearbox bearings, and there is also a lack of oil in the axle housing, this leads to an increase in the noise level during the operation of the MTZ-82 front axle.

To eliminate this malfunction, you must first determine the cause of the breakdown. Then replace the differential bearings, gears, or repair or replace the gearbox. If there is an oil leak, then check for a leak in the seals of the MTZ-82 front axle crankcase. In this case, replace rubber products and restore the oil level.

Oil leakage is one of the most common malfunctions of the MTZ-82 front axle. Oil leaks can be caused by wear or damage to the oil seal, wear of the oil seal of the internal hinge housing, loosening of the bearing cover of the internal hinge housing or crankcase covers, or damage to the gaskets.

What needs to be done to eliminate oil leakage in the MTZ-82 front axle? Replace damaged oil seals, gaskets, tighten nuts and bolts.

Noise, knocking from the side of the MTZ-82 front axle when driving (especially when cornering)

When the tractor is moving, do you hear strong noises and knocks on the side of the MTZ-82 front axle? Be aware that in the MTZ-82 front axle, the parts of the constant velocity joints of the front wheel drives are worn out. To fix the problem, replace worn and damaged hinges.

The front axle does not automatically engage when the wheels are slipping when the tractor is forward.

The appearance of such a malfunction of the MTZ-82 front axle can occur for four reasons: wear of the freewheel clutch parts, jamming grooves of the outer cage of the freewheel clutch are contaminated with products of oil oxidation and wear of parts, the springs of the tensioning mechanism of the rollers are deformed and the safety clutch does not transmit torque.

What needs to be done to eliminate this malfunction of the MTZ-82 front axle?

First of all, of course, identify the node where the fault occurred. Then, if necessary, replace the worn parts of the freewheel clutch, clean and wash the parts of the freewheel clutch, replace the springs of the tensioning mechanism of the rollers, or adjust the safety clutch to a torque of 50 - 55 kgf • m.

Remember that timely diagnostics and troubleshooting will save you up to 100 thousand rubles a year for repairs and maintenance of the MTZ-82 front axle.

Some points of repair of the front axle MTZ-82

When repairing or servicing the main gear and differential of the MTZ-82 tractor, the front axle must be hung out and installed on stands. Then remove the final drive. Carry out an external inspection of its parts and, turning the driven gear with a mounting crowbar, inspect the parts of the differential.

During disassembly, pay attention to the fit of the bearing races. When loosening the fit, the clips easily turn or move in the axial direction, measure the fit diameters of the parts. Replace the glasses of the main transmission MTZ-80, MTZ-82 when the bearing seats are worn up to sizes - more than: 80.12 and 62.12 mm. The gear-shaft of the main drive is replaced when the teeth are chipped or worn out. Less often, replace both bevel gears when the seats for the bearings of the drive gear-shaft are worn down to dimensions - less than 34.90 and 29.96 mm.

For the MTZ-82 tractor, replace the differential boxes and the axle housing if the outer and inner diameters for bearings are less than 59.88 and more than 110.14 mm. Since the replacement of these parts is associated with high labor costs, then if the indicated wear is found, replace the MTZ-82 front drive axle assembly.

After assembling and installing the differential in the axle housing, check the axial movement of the driven gear of the main drive - clearance in the differential bearings. When moving the gear in the axial direction, the indicator readings should be within: for the MTZ-82 tractor - 0.01. 0.10 mm. If the movement of the gear is more than 0.5 mm, as well as if there is no play in the bearings, make the adjustment. Change the number of gaskets that are located between the body and the bridge cover at MTZ-82. To reduce the gap, remove several spacers, and install additional ones to increase the gap.

After the axial clearance in the bearings of the final drive and differential is adjusted, install the final drive in the axle housing and check and, if necessary, adjust the lateral clearance between the teeth of the bevel gears. This operation for the MTZ-82 tractor is mandatory after replacing the main gear parts and after adjusting the axial clearance in the differential bearings.

For the MTZ-80, 82 tractor, adjust the side clearance by changing the thickness of the package of gaskets located under the bearing cup of the main gear. When you remove some of the spacers, the gap between the gears decreases, and when you add spacers, it increases.

After the side clearance is adjusted, turn the suspended MTZ-82 front axle either by the wheel or by the cardan flange. In this case, the main gear should turn smoothly, without jerking or jamming. The correctness of assembly and adjustment of the differential and the main transmission of the MTZ-80.82 tractor is checked by the contact patch of the bevel gear teeth. When correctly adjusted, the stain is located in the middle of the tooth in length and height and occupies at least half of its area.

MTZ-82 front drive axle adjustments

Axial clearance in tapered bearings of the transfer case intermediate gear, not more, mm

Repair of the front axle of the MTZ-82 tractor, tips and faults

We disassemble the main gear of the front axle MTZ-82

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who changed the sleeve of the pivot pipe of the front axle mtz 82 can it be done at home

we were changed in the factory by the press

who changed the sleeve of the pivot pipe of the front axle mtz 82 can it be done at home

at home is almost impossible. I know 2 examples when a similar operation at home ended with a crack in the side hull. it is desirable to produce it in the factory

there the side was warmed when they painted for a start, there it is necessary to twist the pin shorter than the house is not realistic.

quite even real. you make a press out of the jack, you drive the insert instead of the pivot to the stopper with its ring (we took a 52 piston from the gas) in the groove for the seal and squeeze it out through the hole for the small cylinder, of course, you first knock out the locking pin. it is assembled even easier but without a sledgehammer. it is true that the repair of the liner is less on the outside, you have to “spark” on them by welding with the help of two sheets of spring - one mass - on it a liner-holder to the other and roll it (the result is positive, so even the bearings were brought to the landing the size of the nest, the main thing is not to overheat)

We had a case when a tractor for 2 years had jammed all this economy on the right side, at first they even thought that the column had welled up, they barely got to the house from the field (you could turn the steering wheel), but after throwing off the traction at home everything cleared up.
When disassembling, the pipe itself came out together with the kingpin (the one that is screwed in with four bolts) and the problem was precisely to corrode them, and the sleeve itself came out of the body with a bang!

you have to “spark” on them by welding with the help of two sheets of spring - one mass - on it a sleeve-holder to the other and roll it (the result is positive, so even the bearings were brought to the landing size of the socket, the main thing is not to overheat)

you can learn more about this operation

in my case, the screw is screwed with 4 bolts to the flange, the pin is knocked out inward, you warm the side, you twist it with a pry bar and it comes out on the head of the screw, sometimes you knock it and everything is in our hands pressed with a jack in my hands and not so dirty

hard and unsightly life of a forest tractor driver

In Fig. 251, this pipe is pressed in with two bolts, there are two holes on it, usually sealed with felt, or you clean them with something else and screw these bolts in and that's it.

In Fig. 251, this pipe is pressed in with two bolts, there are two holes on it, usually sealed with felt, or you clean them with something else and screw these bolts in and that's it.

I wrote how I press out the sleeve of the kingpin and not the pipe, for that everything is clear as daylight

hard and unsightly life of a forest tractor driver

in in own. shorter than the seminal bungle and that's all. Well, it’s necessary once every 100 years, but it remains a fact.

Well, I don’t know how it’s even more detailed. With a weak fit in the socket, you can simply use the holder with the electrode (to move) along the sleeve, but this does not give a uniform distribution of the deposited points. When rolling, the result is uniform non-wearing of metal drops. It is good to do two together, one sticks the sleeve (bearing ) on the bottom leaf of the spring with the other two hands presses the top sheet to the sleeve and rolls it like the dough is rolled out. rust on the sheets serves as a coating on the electrode, so there is no point in cleaning the sheets to a shine. I took the owl from old magazines I've been using it for many years already. On my tractor I put the outer cage in the side bearing 2310, the sleeve in the right side. The neighbor has a semi-axle bearing on the VAZ 07, they have been serving for several years. You just need not to overheat when rolling. the current is not very large 60-100 A if a lot needs to be deposited in this way, then do it with breaks for cooling. You can work alone, but it is more difficult to keep the part to be welded between the sheets.

The MTZ 82 tractor is equipped with two axles, where the first is the front (leading), the second is the rear (driven). At the same time, the quality of the front axle, as a rule, determines the ability of the device to overcome the earthen tracks inherent in fields that are cultivated by agronomists. The MTZ front axle helps the tractor to carry out a large list of functions, from plowing the field to processing and harvesting crops.

As a result, this part is subject to increased wear, which means that it requires proper care. It should be noted that if the rules of regular maintenance are neglected, there is a risk of breakdowns, which increases over time.

The front axle plays one of the main roles in the operation of the tractor. The front axle transfers torque from the engine to the wheels. The transmission is carried out by means of a cardan shaft, as a result of which, the unit begins to move forward. Also, the function of the MTZ 82 front axle is to provide stabilization in the control of the driving wheelset.

The design basis of the device of the 82nd model of the Belarusian tractor manufacturer can be characterized by several of the most significant elements, including:

• bevel gearboxes;
• the girder bridge is located on the supporting beams;
• main gear;
• differential with self-locking function.

Front axle device MTZ 82

The reducer, installed on each wheel, is telescopically connected to the sleeve, which has the front axle housing. At the same time, while the tractor is in motion the gearbox changes its position, shifting parallel to the plane in which the sleeve is locatedwith which the gearbox is connected. This is due to the interconnectedness of the parts.

At the same time, the bevel gears, which are equipped with the gearbox at MTZ 82, significantly improve tractor control, increasing the turning angle. This minimizes the turning radius and provides the vehicle with the required ground clearance.

The load-bearing beams are a kind of support made of semi-frame timber, which provides the entire device with the proper level of mobility. The suspension made according to this scheme has its own name - semi-rigid.

The main gear together with the front axle differential are located inside the structure. It is the responsibility of the center gear to increase the torque force, which leads to the increase in power to the required level. The transmission consists of bevel gears. The function of the clamps, preventing excessive swinging of the bridge part, is performed by the protrusions installed in special places of the body and cover.

The differential, which the MTZ 82 bridge is equipped with, is made of two parts similar to each other. Each of the parts contains:

• 4 satellites;
• paired axles;
• paired gears;
• 2 pressure bowls;
• blocks equipped with friction discs.

In order for the tractor and all its components to function smoothly and properly, it is necessary from time to time, or rather, after a certain period of time, or the number of hours of operation, to carry out maintenance (MOT). This activity, although it requires a certain amount of time and physical effort, is not too difficult. By and large, you need to control the oil level, replace it according to the plan, and also monitor the broach of all fasteners, eliminating all the gaps that appear.

Front axle MTZ 82 disassembled

It is worth noting that if you carry out maintenance in a timely manner, you will avoid the need to put the colossus for overhaul. The maintenance of the driving axle involves checking several working parts, for which a certain instruction is provided in the form of a diagram.

The pair of upper bevel gears is adjusted by means of a specialized retaining nut. For correct adjustment, it is necessary to set such a position so that the axial clearance does not exceed 0.05 mm.

The essence of the adjustment is as follows: while tightening the nut, at the same time it is necessary to turn the bearings, doing this until they become in the required position. Then the nut must be loosened, which will provide the bearings with a free rotation area. Upon completion of the adjustment, the nut is locked with a core.
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The beginning of maintenance of wheel gears does not differ from the beginning of maintenance of support bearings and begins with an inspection of the sensors that show the current oil level. If the oil does not fulfill its function, which is to lubricate the rubbing elements, these elements will quickly fail.

In this regard, it is also important here to monitor not only the availability, but also the quality of the oil, and carry out its planned replacement. During the operation of the tractor, a significant part of the load falls on the gearbox, as a result of which, this part requires a regular check of the condition of all connections.

Fortunately, not all components of the wheel reducer need to be adjusted during maintenance. In particular, this applies to bevel gears. These components are regulated, as a rule, only during their replacement.
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This part passes through itself most of all the loads, therefore, a gap forms between the teeth of the hook over time, which constantly increases. Due to the increase in this gap, the so-called backlash appears. Backlash reduces the efficiency of the gear and the tractor cannot operate at optimum power.

Front axle reducer gear

To adjust the drive gear, the first step is to check the fastening nut, more precisely, its condition. This is a simple procedure. It is enough to lightly shake the propeller shaft flange by hand. If the flange moves freely on the spline joints, the nut must be tightened, since it has loosened. After pulling the fastening nut, check the flange again, the backlash should disappear.
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Both of these units are located in a single housing, respectively, they have to be serviced at the same time. When examining these nodes, the following is taken into account:

• what is the state of the axle shafts;
• inspect how tight all the connecting elements are;
• the level and quality of the oil is checked, if necessary, it is replaced;
• inspection of axial clearances is carried out;
• a check of the production of all parts is carried out.

If, when inspecting the differential and front gear, it is found that some parts have exhausted their resources, they must either be sent for repair or replaced with new ones.
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Despite the fact that the MTZ model 82 tractor is one of the most reliable in its direction, its parts, nevertheless, sometimes fail. However, by following the front axle maintenance guidelines above, the risk of failure of most parts is minimized.

Propeller shaft of the front axle MTZ 82

For the most part, the MTZ tractor breaks down due to the lack of lubricants (oil). Lubrication plays a huge role in the performance of all products that are designed with moving parts. In this case, those who have an MTZ tractor may face such moments:

1. The appearance of an oil residue inside the wheel rim.
2. Lubrication marks on the central transmission housing or on the propeller shaft flange.

In the first case, the reason lies in the wheel axle. To fix the malfunction, remove the wheel together with the final drive reducer, remove the gear and the radial bearing, which is tightened with the mounting bolts. Fix the axles. Assemble in the reverse order of disassembly.

The second case indicates a failure of the main gear cuff. It is fixed like this:

• the flange is removed from the propeller shaft, for which it is necessary to unscrew the corresponding nuts;
• the bearing block of the main drive is disassembled. To do this, unscrew the mounting and fastening bolts. The block itself resembles an ordinary glass;
• the drive gear is removed;
• the cuff is removed;
• a new cuff is installed;
• assembly of the unit is performed.

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This element does not perform such important functions as the front axle drive, however, without it, full-fledged movement of the tractor will be impossible. This device plays the role of a rear semi-frame. Because of this, some difficulties arise during maintenance. However, with the proper skill, these difficulties will not be noticeable.

The maintenance of this unit includes checking the oil level, as well as measuring the clearances between the teeth of the front gear. To repair the rear axle parts, the cab and other elements that prevent access to the unit are dismantled, the rear axle is disconnected from the front half-frame and the rear wheels are dismantled, the unit is disassembled, the faulty elements are repaired, or replaced with new ones.

It is worth noting that the MTZ 82 series tractor is made of materials that are distinguished by increased wear resistance. But each type of technique requires a proper attitude towards itself. In particular, this applies to TO. Otherwise, breakdowns cannot be avoided. To avoid sending the tractor for overhaul, keep track of the number of hours of operation of the device and do not forget about the scheduled replacement of the lubricant in the units.