DIY front axle repair MTZ 80

Belarus tractors MTZ-80, MTZ-82, MTZ-82.1, MTZ-1221, 1523, MTZ-892, YuMZ, T-40. Agricultural machinery: plows, cultivators, walk-behind tractors, mowers, seeders

SPARE PARTS FOR TRACTORS

ADJUSTMENT OF MTZ TRACTORS ___________________

DIESEL ENGINE PARTS ___________________

SPARE PARTS CATALOGS MTZ ___________________

TECHNICAL CHARACTERISTICS OF TRACTORS ___________________

SPECIAL EQUIPMENT BASED ON MTZ AND ATTACHED EQUIPMENT ___________________

AGRICULTURAL MACHINERY AND EQUIPMENT ___________________

The gap in the ball joint of the steering link, the beating of the MTZ-80 wheel when driving in a straight line indicate wear of the working surfaces of the joint.

During repairs, the pivot arm is pressed from the tapered surface of the ball pin with a special puller. The pin is replaced when the ball surface is worn down to a size of less than 31.8 mm, and the bushings are replaced when the hole surface is worn down to a size of more than 32.4 mm.

Sharp shocks and shocks transmitted to the semi-frame when driving over bumps are the result of breakage or loss of elasticity of the suspension springs.

To repair the springs, the MTZ-80 front axle is installed on a support, the pivot arm is pressed, the axle is removed, and the bolts securing the lower sleeve of the pivot pin are unscrewed.

Squeaks, wheel runout indicate wear or destruction of the hub bearings, loosening of the tapered bearing nut.

If an external examination fails to identify the cause of the malfunction, then measure the axial clearance in the hub bearings.

If the value of the axial clearance is more than 0.5 mm, it is adjusted. To do this, unpin the castellated nut, tighten it to failure and turn it off one edge (20-30 °).

After the adjustment, the wheel should turn freely without jamming from the force of the hand. If the wheel sticks or rotates unevenly, then the hub is disassembled.

When adjusting the clearance in the bearings of the MTZ-80 front axle hubs, it can be revealed that the castellated nut has loosened; in this case, check the condition of the tapered bearings.

Unscrew the nut, remove the washer (Fig. 1) and press the hub with a special puller.

In the process of inspection, the hubs move the bearing races in the axial direction and try to turn them in the seats.

If chips or breakages are detected, in the event of axial movement or rotation of the clips in the seats, the bearings are replaced.

The relative position of the parts of the front axle and the idler wheel, as well as some operations of disassembly-assembly of the hub are shown in Fig. 2.3.

Knocks in the steering knuckles, winding of the MTZ-80 tractor when driving in a straight line indicate wear on the trunnion bushings. Trunnion bushings are replaced when the inner surface is worn to a size of more than 50.5 mm (lower) and 38.6 mm (upper).

Rice. 1. Removing the MTZ-80 front wheel hub fastening washer

1 - hub; 2 - pin; 3 - washer

Rice. 2. Mutual arrangement of parts of the front axle MTZ-80

1 - swing axis; 2 - front axle; 3 - bracket; 4 - tip assembled with a ball pin; 5 - pipe; 6 - pivot arm; 7 - bushing; 8 - pin; 9 - spring; 10 - retainer

Rice. 3. Mutual arrangement of parts of the front idler MTZ-80

1 - cuff; 2 - clip; 3 - bearings; 4 - hub; 5 - nut; 6 - gasket; 7 - cover; 8 - wheel

If the MTZ-80 tractor leads to the side when driving on a flat road or there is increased wear on the front wheels, check and adjust the toe-in of the front wheels.

To do this, turn the steering wheel to failure in one direction, and then in the opposite direction also to failure, counting the number of revolutions of the steering wheel.

Then the steering wheel is returned to the middle position by turning it half of the previously counted revolutions.

Install the KI-650 ruler behind the wheel with the tips into the tire next to the rim at the level of the axle, the ruler arrow is placed on the “0” scale division.

By rotating both wheels with the MTZ-80 front axle jacked up, the ruler is moved to the front position also at the level of the axle. Read off the ruler on the scale.

If the result goes beyond 6-12 mm, the convergence is adjusted by increasing or decreasing the length of the transverse rods.

In case of cracks in the front axle housing or extreme wear of the swing axis, the front axle is removed as an assembly and replaced with a new one.

To remove and install the swing axis and its bushings, use special pullers and devices. The swing axis is replaced when the landing dimension is less than 49.9 mm.

Dismantling and repair of the front drive axle of the MTZ-82 tractor

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 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 parts of the differential (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, unscrew the bolts that tighten the boxes; 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.

A gap in the ball joint of the steering link, wheel runout when driving in a straight line indicate wear on the working surfaces of the joint.

The pivot arm is pressed from the tapered surface of the ball pin with a special puller (Fig. 2.4.1). The pin is replaced when the ball surface is worn down to a size of less than 31.8 mm, and the bushings are replaced when the hole surface is worn down to a size of more than 32.4 mm.

Sharp shocks and shocks transmitted to the semi-frame when driving over bumps are the result of breakage or loss of elasticity of the suspension springs.

To replace the springs, the MTZ-80 front axle (front axle) is installed on a stand (Figure 2.4.2), the pivot arm is pressed, the pivot is removed, and the bolts securing the lower sleeve of the pivot pin are unscrewed (Figure 2.4.3).

Squeaks, wheel runout indicate wear or destruction of the hub bearings, loosening of the tapered bearing nut. If an external examination fails to identify the cause of the malfunction, then measure the axial clearance in the hub bearings.

Rice. 2.4.1. Pressing the ball pin of the tie rod from the pivot arm

1 - ball pin; 2 - swing arm; 3 - special puller

Rice. 2.4.2. Hanging the front axle MTZ-80

1 - front axle; 2 - stand

Rice. 2.4.3. Removing the lower pivot bushing

1 - lower sleeve; 2 - pivot pin

If the value of the axial clearance is more than 0.5 mm, it is adjusted. To do this, unpin the castellated nut, tighten it to failure and turn it off one edge (20-30 °). After the adjustment, the wheel should turn freely without jamming from the force of the hand. If the wheel sticks or rotates unevenly, then the hub is disassembled.

When adjusting the bearing play, it may be found that the castle nut is loose; in this case, check the condition of the tapered bearings. Unscrew the nut, remove the washer (Fig. 2.4.5) and press the hub with a special puller (Fig. 2.4.6).

In the process of inspection, the hubs move the bearing races in the axial direction and try to turn them in the seats. If chips or breakages are detected, in the event of axial movement or rotation of the clips in the seats, the bearings are replaced.

The relative position of the parts of the MTZ-80 front axle and the idler wheel, as well as some disassembly-assembly operations of the hub, are shown in Fig. 2.4.7-2.4.13.

Knocks in the steering knuckles, yaw of the tractor when driving in a straight line indicate wear on the trunnion bushings. Trunnion bushings are replaced when the inner surface is worn to a size of more than 50.5 mm (lower) and 38.6 mm (upper) (Fig. 2.4.14).

Rice. 2.4.5. Removing the front wheel hub retaining washer

1 - hub; 2 - pin; 3 - washer

Rice. 2.4.6. Pressing the front wheel hub

1 - hub; 2 - pin; 3 - two-blade puller

Rice. 2.4.7. Mutual arrangement of parts of the front axle (front axle) MTZ-80

1 - swing axis; 2 - front axle; 3 - bracket; 4 - tip assembled with a ball pin; 5 - pipe; 6 - pivot arm; 7 - bushing; 8 - pin; 9 - spring; 10 - retainer

Rice. 2.4.8. Mutual arrangement of parts of the front idler wheel

1 - cuff; 2 - clip; 3 - bearings; 4 - hub; 5 - nut; 6 - gasket; 7 - cover; 8 - wheel

Rice. 2.4.9. Pressing out the hub collar

1 - cuff; 2 - hub; 3 - puller

Rice. 2.4.10. Pressing out the hub cage

1 - clip; 2 - hub; 3 - inertial puller

Rice. 2.4.14. Pressing out the upper bushing of the pivot pin

1 - top sleeve; 2 - bracket; 3 - mentor

If the tractor "pulls" to the side when driving on a flat road or there is increased wear on the front wheels, check and adjust the toe-in of the front wheels.

To do this, turn the steering wheel to failure in one direction, and then in the opposite direction also to failure, counting the number of turns of the MTZ-80 steering wheel. Then the steering wheel is returned to the middle position by turning it half of the previously counted revolutions.

Install the KI-650 ruler behind the wheel with the tips into the tire next to the rim at the level of the axle, the ruler arrow is placed on the “0” scale division.

By rotating both wheels with the front axle jacked up, the ruler is moved to the front position, also at the level of the axle. Read off the ruler on the scale. If the result goes beyond 6-12 mm, the convergence is adjusted by increasing or decreasing the length of the transverse rods.

In case of cracks in the front axle body or extreme wear of the swing axis, the front axle is removed as an assembly and replaced with a new one (Fig. 2.4.15, 2.4.16).

To remove and install the swing axis and its bushings, use special pullers and devices (Fig. 2.4.17-2.4.19). The swing axis is replaced when the landing dimension is less than 49.9 mm.

Rice. 2.4.15. Installation of a stand under the front axle MTZ-80

1 - front axle; 2 - stand

Rice. 2.4.17. Pressing out the swing axis and its sleeve

1 - puller; 2 - front axle; 3 - swing axis; 4 - swing axis bushing

Rice. 2.4.18. Alignment of pivot and front axle holes

1 - swing axis; 2 - front axle

Rice. 2.4.19. Disconnecting (installing) the front axle

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

Front axle of the MTZ-80 tractor.

The front axle of the MTZ-80 tractor is a telescopic swinging tubular beam connected to the front bar of the semi-frame by means of a swing axis.

At each end, a retractable fist is inserted into the pipe, consisting of a bracket and a retractable pipe. The latter can be mounted in the front axle tube in six positions at intervals of 50 mm, which allows changing the track of the idler wheels from 1200 to 1800 mm. Swivel pins are installed in the brackets of the fists on two bushings. The load on the wheels from the weight of the tractor is taken up by thrust bearings through shock-absorbing springs that provide suspension of the tractor frame.

At the upper ends of the pivot pins, swivel levers are fixed, connected to the steering mechanism bipod by means of steering rods that form a split steering linkage. The rods are adjustable in length and are pivotally connected to the swivel arms and the bipod.

1 - swing axis; 2 - tubular beam; 3 - finger; 4 - bolt; 5 - turn ysq lever; 6- top axle bushing; 7 - retractable fist; 8 - spring; 9 - thrust bearing; 10- lower axle bushing; 11 - disc springs; 12 - left pivot pin; 13 - right pivot pin; 14 - safety wire; 15 - adjusting plug; 16 - ball pin; 17 - lock nut; 18 - steering rod pipe.

Repair of the front axle of the MTZ-80, 82 tractor

Over time, at the time of operation of the MTZ-80, 82 tractor, it is required to dismantle and repair the front axle. From certain characteristic sounds, it is sometimes possible to understand which breakdowns have occurred and which components need to be replaced.

For example, if there is a gap in the ball joint of the steering rod, the knock of the wheels when driving, then this indicates the wear of the working surfaces of the joint.

Sharp shocks and shocks that occur when driving over irregularities, transmitted to the semi-frame, indicate breakdowns and loss of elasticity of the hitch springs.

In this case, in order to replace the springs, the front axle is installed on a support, the pivot arm is pressed, the trunnion is removed, and the bolts of the lower bushing of the pivot pin are unscrewed.

Squeaks, wheel runout indicate wear or destruction of the hub bearings, loosening of the tapered bearing nut. If during an external examination it is not possible to understand the cause of the difficulties encountered, then the axial clearance in the hub bearings should be measured.

1- swing axis; 2- front axle; 3- bracket; 4- tip complete with ball pin; 5- pipe; 6- pivot arm; 7- sleeve; 8- pin; 9- spring; 10 - retainer.

In the process of inspection, the hubs move the bearing races in the axial direction and try to turn them in the seats. If chips or breakages are detected, in the event of axial movement or rotation of the clips in the seats, the bearings are replaced. The relative position of the front axle parts and the idler wheel.

Knocks in the steering knuckles, yaw of the tractor when driving in a straight line indicate wear on the trunnion bushings. Trunnion bushings are replaced when the inner surface is worn to a size of more than 50.5 mm (lower) and 38.6 mm (upper).

If the tractor "pulls" to the side when driving on a flat road or there is increased wear on the front wheels, check and adjust the toe-in of the front wheels. To do this, turn the steering wheel to failure in one direction, and then in the opposite direction also to failure, counting the number of revolutions of the steering wheel. Then the steering wheel is returned to the middle position by turning it half of the previously counted revolutions. Install the KI-650 ruler behind the wheel with the tips into the tire next to the rim at the level of the axle, the ruler arrow is placed on the “0” scale division. By rotating both wheels with the front axle jacked up, the ruler is moved to the front position, also at the level of the axle. Read (readings of the ruler on the scale. If the result goes beyond 6-12 mm, the convergence is adjusted by increasing or decreasing the length of the transverse rods.

In case of cracks in the front axle body or extreme wear of the swing axis, the front axle is removed as an assembly and replaced with a new one (Fig. 2.4.15, 2.4.16). To remove and install the swing axis and its bushings, use special pullers and devices. The swing axis is replaced when the landing dimension is less than 49.9 mm.

If the value of the axial clearance is more than 0.5 mm, it should be adjusted. To do this, you need to unpin the castellated nut, tighten it to failure and unscrew it by one edge (20-30 °). After these actions, the wheel should turn freely without jamming from the effort of the hand. If the wheel sticks or rotates unevenly, then the hub must be disassembled and inspected.

When adjusting the bearing play, it may be found that the castle nut is loose; in this case, check the condition of the tapered bearings. Unscrew the nut, remove the washer and press the hub with a special puller.

The front axle of the MTZ-80 tractor assumes the presence of a leading gearbox. Additionally, metal bridges and gaskets are installed. Experts believe that the model has enough stability under any conditions. But it is necessary to consider in more detail the features of the repair so that in the future as few questions as possible arise. Let's analyze in detail the MTZ 80 front axle, device, device diagram.

The front axle has a diagram that includes the following elements:

1. Wheel-type reducer.
2. Front differential related to the gearbox.
3. Broadcast.

The supply of agricultural machinery with front axles allows you to get ground clearance with a sufficient width. Depending on the requirements, the driver can easily change the track gauge. The driver can use the equipment as an assistant in areas with any peculiarities. The design easily bypasses the beds of different sizes.

Care, periodic maintenance is required for the front axles. If you do not do preventive repairs, ignore the replacement of parts that have lost their working life, then you will have to carry out major repairs later, and this is associated with additional costs. At the same time, the tractor driver can perform standard maintenance operations independently. The price of the MTZ 80 front beam remains standard.

All modifications of this technique are equipped with a front axle of approximately the same design. The main function is for the wheels in front to receive the torque. The movement begins with the engine. Power transmission is carried out using the cardan shaft, and then it is transferred to the wheels. After that, the parts work synchronously, the forward movement continues at the equipment itself.

The connection between the FDA and the support bar at the semi-frame helps to maintain mobility. This is a kind of "hard" mounting schemes. The role of special clamps is played by the protrusions that are supplied to the cover with the body. Thanks to this, the bridge will never acquire a strong amplitude, due to which it will begin to swing.When designing parts inside the machine, the differential is retracted, as is the center gear. Then the device of the front beam MTZ 80 retains its simplicity and reliability.

The differential device also has two main parts, which themselves comprise the following components:

1. A pair of bowls.
2. Blocks with friction discs.
3. Axles.
4. Gears with pairwise separation.
5. 4 satellites.

Several bevel gears are connected together - this is how a central gear is obtained. It is designed to make the torque more active. This helps the machine get the power it needs to work. Thanks to this, the tractor is able to move, carry the necessary power reserve.

The gearboxes at the wheels are also connected to the front axles. The process involves the use of telescopic joints, special sleeves. The gearbox begins to shift when the front axle is engaged. The turning angle of the machine is widened due to the presence of cone-shaped gears on each reducer. That makes it possible to cope even with the work of high complexity. The ground clearance increases, the turning radius, on the contrary, takes on a minimum value.

Even the most reliable technology is not completely fault-free. The main reason is untimely maintenance. In addition, problems arise from the loss of a significant portion of the lubricant.

The collar at the main gear must be replaced if traces of lubricant appear on the end of the propeller shaft or on the center gear housing. For this, the flange at the propeller shaft is removed. It is assumed that the nuts must be completely removed. The next step is to get rid of any bolted fasteners. Attention is paid to every detail located on the bearing block at the center gear. The center gear also needs to be removed. When all the steps are completed, the cuff itself is replaced.

The appearance of oil residues indicates that the front axle, on which the wheels are mounted, also requires repair.

When parsing this part, it is recommended to rely on a certain scheme:

1. Dismantling the wheel and gearbox. The latter organizes the final transfer.
2. Unscrew all the bolts that help to hold the radial bearing.
3. The gear is retracted.

The bridge at the rear of the vehicle performs the function of a semi-frame additionally. When servicing such structures, problems often arise that make it necessary to carry out serious repairs to the front axle.

The procedure is described as follows:

1. The cab is removed along with other components of agricultural machinery, due to which access to the part is limited.
2. Separation of the rear axle and the front half-frame from each other. There are wheels on the rear axle that must be removed completely.
3. Disassembly of the rear axle, in full. At the next stage, all the necessary work is performed.

The tractor is assembled in the reverse order. The initial rolling of the equipment allows you to understand if all the problems have been fixed.

Scheduled on-board technical inspection is a mandatory procedure for equipment and its components. Otherwise, you can not hope for a stable job.

The procedure itself consists of several stages:

1. Tracking the amount of oil inside the motor.
2. Periodic fluid change.
3. Tightening the fasteners.
4. Correction of shortcomings of small scale.

Modern inspections eliminate the need for a major overhaul. Let's take a closer look at the main details that require the most attention. The swing axis sometimes also implies structural adjustments.

Inside a single housing, there is a differential along with a central gear. Therefore, they must be considered together. The technical inspection involves a careful study of the following information:

1. Oil level.
2. The current state of the axle shaft.
3. Clearances between the axles.

This stage involves additional adjustment for the fasteners of the structure. Parts that have fallen into disrepair are removed and replaced with new ones.

The wheel gears should also be checked for the oil level. These parts are constantly rubbing against each other and against what is nearby. Rapid wear occurs when a small amount of lubricant is used. If the part breaks, then the repair does not help, only a full replacement is required. You should not use the front axle GAZ 66 on MTZ 80, there is a high probability of incompatibility.

The operation of gearboxes under all circumstances is associated with the presence of serious loads. Only the cone-shaped gears do not require adjustment. This action is performed only when it is necessary to replace all parts, carry out a major overhaul.

The gear wears out because it takes the load from the main parts. Because of this, the teeth of the element wear out after a while. Which contributes to the increase in the distance between the constituent elements. If the presence of such a condition is not taken into account for a long time, then the probability of breakdown of the entire tractor increases. Tightening the union nut helps to adjust the structure.

It is enough to fasten the nut to repair parts such as bevel gears and bearings. It is important to properly seat the bearings during tightening. After that, a gradual rotation is carried out until the position of the part is completely satisfied. Next, the fasteners are fixed in their final position, when the main work ends.

The use of a core sample is assumed. The price of the MTZ 80 front axle remains the same regardless of conditions.

Many craftsmen choose engines from other tractors for installation. This allows for an affordable replacement alternative to be found. The option is perfectly valid if there is complete confidence in compatibility. If not, it is recommended to give preference to native structures. Then repairing the front beam will not be a hassle.

Carrying out simple actions allows you to avoid serious costs during further operation. The equipment is quite reliable, but sometimes even it requires maintenance. To carry out the work is within the power of the tractor driver himself, he does not need additional help for this. All that remains is to select tools with suitable characteristics. And clearly follow the instructions telling how to put the front axle on the MTZ 80. It is good when there are familiar masters who are able to consult. Then there will be no doubt about the results obtained.