In detail: do-it-yourself repair of a piglet MTZ 82 from a real master for the site my.housecope.com.
Adjustment of the cardan drive FDA tractor MTZ-82
In the cardan drive, adjust the safety clutch in the intermediate bearing and check the side play in the cardan bearings. Adjust the safety clutch for the transmission of torque in the range of 40-80 kgf * m (400-800 N * m). Adjust the coupling by tightening the nut 2 (Fig. 57) of the rear shank of the intermediate support shaft until the required torque is transmitted. Periodically check the side play in the bearings of the universal joints. If there is any play, disassemble the hinge and check the condition of the bearings and crosses, replace the worn parts. When assembling the cage of the oil seals, press them into the bearing until they stop.
The propeller shaft is dynamically balanced. Do not disassemble the propeller shaft unless necessary. When replacing parts during operation - pipes with forks of the hinge and flange - the shaft assembly with two hinges, rebalance dynamically by welding plates on both ends of the pipe. The imbalance should not exceed 55 g * cm. Do not turn propeller shafts with pry bars, wrenches and other devices to avoid damage to the seals and damage to the bearings of the crosspieces.
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.
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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
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I installed a “piglet” on MTZ-82 (absent), the front axle does not work.
I tried to sort it out, there is no result.
What do you advise?
Try adding extra discs to the pig
maybe the bridge does not turn on forcibly and the overtaking does not work.
WHAT CARDAN WHICH SPINS FROM THE DISTRIBUTION?
hard and unsightly life of a forest tractor driver
And who sees 
when the FDA is forcibly turned on the rear wheels are spinning and the front wheels are standing.
intermediate bearing of cardan shafts
hard and unsightly life of a forest tractor driver
Throw out all the insides from the outboard and put in two flanges. Has been working for many years and has been tested on itself
You can just tighten it harder, I thought it didn't work, but once in the swamp I had to tie the log to the front end, it worked.
when I bought a tractor (naturally used), the parasenok had no insides, just with two flanges, then I bought a new one, but it slipped like a load, as a result, I tightened it tightly, in fact, it turned out the same as it was.
They just bought in vain, he would have traveled with the flans for many years
Guys tell me, I have a piglet's body, I want to assemble it somehow. only ideas do not come to mind. I wanted to assemble without any retractable mechanism, just 2 flanges and a shaft on bearings. Or do you need to collect for a new building?
And on this forum there is at least one topic in which you did not ask this question?
And on this forum there is at least one topic in which you did not ask this question?
no, it didn’t stay, because only one topic was answered.
And on this forum there is at least one topic in which you did not ask this question?
no, it didn’t stay, because only one topic was answered.
Ildar there is nothing wrong with asking questions nato this site exists
And on this forum there is at least one topic in which you did not ask this question?
no, it didn’t stay, because only one topic was answered.
Ildar there is nothing wrong with asking questions nato this site exists
Well, yes. just the nerves can no longer stand, I want to finish the front end faster.otherwise, you can't drive through a snowdrift without a front end, and you can't build a road. tired of wasting fuel. and this snow does not stop. For 3-4 years the road has not been properly cleaned. and this year, just 3-4 years later.
And on this forum there is at least one topic in which you did not ask this question?
no, it didn’t stay, because only one topic was answered.
Ildar there is nothing wrong with asking questions nato this site exists
Well, yes. just the nerves can no longer stand, I want to finish the front end faster. otherwise, you can't drive through a snowdrift without a front end, and you can't build a road. tired of wasting fuel. and this snow does not stop. For 3-4 years the road has not been properly cleaned. and this year, just 3-4 years later.
I also did not work, I was waiting for the washers to be brought in.
Good evening everyone.
The problem with the slipping of a piglet on his MTZ 82 was radically solved.
I just took and welded a flange that looks towards the box to the cylinder
a second flange that faces the front axle. I have been doing this for three years already. The only drawback of this alteration is that it is impossible to "tear" the tractor, especially under the kun,
Will tear a canine in the front axle ..
Good afternoon, dear specialists! I have MTZ 892, year of manufacture 2006, a question arose with the repair of the intermediate support, that is, the "pig". On the basis of spare parts, I was offered to buy a flange similar to the front one, then remove the axle with a set of washers and put this flange in its place.
It turns out that the "pig" on both sides will have the same flanges. Technically, this is done simply, and this unit will work without problems. But I have big doubts whether other components and assemblies of the tractor will suffer from such amateur performance? What role do washers play?
If anyone has already tried this option or knows how this site works, please share your opinion. Thanks in advance.
Good afternoon, dear specialists! I have MTZ 892, year of manufacture 2006, a question arose with the repair of the intermediate support, that is, the "pig". On the basis of spare parts, I was offered to buy a flange similar to the front one, then remove the axle with a set of washers and put this flange in its place.
It turns out that the "pig" on both sides will have the same flanges. Technically, this is done simply, and this unit will work without problems. But I have big doubts whether other components and assemblies of the tractor will suffer from such amateur performance? What role do washers play?
If anyone has already tried this option or knows how this site works, please share your opinion. Thanks in advance.
Hello colleague. Implemented the second flange. Sometimes it may not work just to insert the flange - the length of the standard universal joint from the distributor is slightly more than required. And the flange sometimes does not go deeper - the slots in the promoter pipe interfere. He gave the pipe to the turner and he removed the slots to a certain depth. Also just leave two flanges not very well - the flanges in the pipe have a backlash and gradually, during operation, the oil from the support comes out because of this. To reduce the backlash, a 40x230mm shaft was introduced into the flanges.
With the standard design, the discs (let the washers) play the role of a friction clutch and slip under excessive load in the FDA, protecting it. By introducing the second flange, you will lose this.
In my case, three tractors with a second flange worked normally for 10 years. Without KUHN. One with a front shovel all year round.
You decide.
The cardan drive of the Belarus MTZ-82.1, 82.2 tractor is designed to transfer torque from the transfer case to the front driving axle.
The cardan drive consists of two cardan shafts of the same design and length (intermediate and front) and an intermediate support.
The cardan shaft Belarus MTZ-82.1, 82.2 consists of a pipe 12 and two hinges with crosses 17 on needle bearings 13.The cages of the needle bearings are fixed with retaining rings 15, the trunnions of the crosses are equipped with mechanical seals 16 and self-tightening cuffs 14.
Flanges 18 cardans are attached to the flanges of the transfer case, the intermediate support 1, 10 and the main pair of the front drive axle.
The propeller shaft assembly is dynamically balanced. The intermediate support consists of an adjustable multi-plate overload clutch and a bearing assembly located in the housing 7, which is mounted on pins and bolted to the clutch housing from below.
The torque from the intermediate cardan is transmitted to the flange 10, which is spline connected to the shaft 24. The pressure discs 20 and the driving discs 21 are mounted on the shaft 24 and transmit the rotation to the sleeve 5 through the driven discs 22.
Flange 1, spline-connected to bushing 5, transmits torque through the front propeller shaft to the front drive axle. The compression of the driving 21 and driven 22 discs is carried out through the pressure discs 20 by the force of the Belleville springs 8. The clutch is adjusted to transmit a certain amount of torque by the nut 11.
Fig. 80. Cardan drive of the front drive axle Belarus MTZ-82-1, 82-2 with an intermediate support
1 - flange; 2 - sealing ring; 3 - cuff body; 4 - cuff; 5 - bushing; 6 - bearing; 7 - the body of the intermediate support; 8 - disc springs; 9 - washer; 10 - flange; 11 - nut; 12 - propeller shaft tube; 13 - needle bearing; 14 - cuff; 15 - retaining ring; 16 - end
seal; 17 - crosspiece; 18 - propeller shaft flange; 19 - gasket; 20 - pressure plate; 21 - leading disk; 22 - driven disk; 23 - bushing, 24 - shaft
Compensation for the movement of the front propeller shaft during swinging of the front drive axle is provided by the axial movement of the flange 1 in the bushing 5. To prevent the winding of straw crops on the propeller shafts during harvesting, a fence is provided.
Fig. 81. Transfer case of the front drive axle FDA Belarus MTZ-82.1, 82.2
1 - spring; 2 - pin; 3 - gear wheel of the check point; 4 - roller; 5 - shaft; 6 - bearing; 7 - bushing; 8 - bearing; 9 - gear; 10 - axis; 11 - intermediate gear; 12 - nut; 13 - toothed clutch; 14 - flange; 15 - roller with a lever; 16 - building
The distributor Belarus MTZ-82.1, 82.2 is designed to transfer torque from the gearbox to the FDA cardan drive.
The transfer case is installed on two pins and bolted to the gearbox housing on the right side of the tractor.
The synchronous drive to the transfer case is carried out from the gear 3 of the gearbox through the intermediate gear 11, mounted on two tapered roller bearings on the axis 10 in the bore of the gearbox housing. The bearings are adjusted with a nut 12.
Transfer case Belarus MTZ-82-1, 82-2 is a single-stage gear reducer with a roller freewheel clutch and consists of the following main units and parts.
Shaft 5 is mounted in the transfer case 16 on ball bearings. On the shaft 5 are mounted: a bushing 7 with an internal gear rim on needle bearings 6, which is an internal cage of the freewheel clutch, a movable gear clutch 13 and a flange 14 for connecting to the intermediate propeller shaft flange.
The gear 9 of the transfer case, made as one piece with the outer cage of the freewheel clutch and the inner toothed rim for forced locking, engages with the intermediate gear 11. The gear 9 rotates relative to the inner cage of the freewheel clutch on two ball bearings 8.
In the profiled grooves of the gear 9, which form the outer cage of the freewheel clutch, there are eight jamming rollers 4. In the working position for jamming, each roller is installed with two pins 2 under the action of spiral springs 1.
Transfer case control on tractors Belarus MTZ-82.1, 82.2 with a unified cab
Gear clutch 13 is controlled by rod 4 through levers 1 and 7. Guide 8 with retainer ball 6 and spring 9 is installed on rod 4, which has three slots, and guide pin 8 is installed in the bracket bushing 5, which is attached to the gearbox cover.
Lever 7 for controlling the FDA drive has three fixed positions:
- "off" - the lowest (front) position. The overrunning clutch is disengaged when the clutch 13 is disengaged with the ring gear of the inner race 7. The retainer ball is in this case in the upper thrust groove.
- "turns on and off automatically" - middle position. In this mode, the FDA is automatically switched on and off by means of the freewheel, depending on the slipping of the rear wheels. Provided when connecting the ring gear of the inner race 7 with the gear
clutch crown 13. In this case, the retainer ball is located in the middle groove of the thrust 4. When the tractor moves forward without slipping, the inner cage of the freewheel clutch, rigidly connected to the front wheels, has a rotation frequency greater than the outer cage. In this case, the rollers do not jam, and the torque is not transmitted to the FDA. When the rear wheels slip more than the set value, the rotational speed of the inner cage is reduced until it becomes equal to the rotational speed
outer cage. At the same time, the clutch rollers wedge and connect both clips into one whole, ensuring the transmission of torque to the FDA. Use this mode when performing various field work.
- "Forcibly switched on" - extreme upper (rear) position. Forced engagement is carried out by a gear clutch 13, which, moving along the splines of the shaft, engages with the internal teeth of the gear 9 and, connecting it directly to the shaft 5, blocks the clutch
freewheel. The fixing ball 6 during forced engagement is in the lower groove of the thrust 4. Use this mode only in cases of constant slipping of the rear wheels and when reversing, when the connection of the front drive axle is required.
Fig. 82. FDA drive distribution control on tractors Belarus MTZ-82-1, 82-2 with a unified cab
1 - finger; 2 - plug; 3 - lock nut; 4 - thrust; 5 - bracket; 6 - retainer ball; 7 - lever; 8 - guide; 9 - spring; 10 - transfer case; 11 - lever.
Control of the distributor on the Belarus MTZ-82.1, 82.2 tractor with an awning frame based on a small cabin
The toothed clutch is controlled by pulling through handle 7 and lever 9. Post 6 is attached to the floor and has three slots, while rod 4 has a stop 5, with which the rod is fixed in the groove of post 6.
The handle 7 for controlling the FDA drive Belarus MTZ-82-1, 82-2 has three fixed positions:
- "off" - the lowest position. The overrunning clutch is disengaged when the clutch is disengaged with the ring gear of the inner race 7. The thrust stop 4 is in the lower groove of the rack 6. Use the “FDA off” mode for transport operations when driving on paved roads;
- "turns on and off automatically" - middle position. In this mode, the FDA is automatically switched on and off by means of the freewheel, depending on the slipping of the rear wheels. Provided when connecting the ring gear of the inner race with the gear
the crown of the clutch 13. The thrust stop 4 is in the middle groove of the rack 6. When the tractor moves forward without slipping, the inner cage of the freewheel clutch, rigidly connected to the front wheels, has a rotation frequency greater than the outer cage. In this case, the rollers do not jam, the torque is not transmitted to the axle.When the rear wheels slip more than the set value, the rotational speed of the inner cage decreases until it equals the rotational speed of the outer cage. At the same time, the clutch rollers wedge and connect both clips into one whole, ensuring the transmission of torque to the FDA. Use this mode when performing various field work.
- "Forcibly switched on" - extreme upper position. Forced engagement is carried out by a gear clutch 13, which, moving along the splines of the shaft, engages with the internal teeth of the gear 9 and, connecting it directly to the shaft 5, blocks the freewheel clutch. The thrust stop 4 during forced engagement is in the upper groove of the pillar 6. Use this mode only in cases of constant slipping of the rear wheels and when reversing when FDA connection is required.
Fig. 83. Controlling the transfer case of the FDA drive on the Belarus MTZ-82-1, 82-2 tractor with an awning frame or an awning base based on a small cabin
1 - finger; 2 - plug; 3 - lock nut; 4 - thrust; 5 - emphasis; 6 - rack; 7 - handle; 8 - transfer case; 9 - lever.
Adjustment of the control rod of the transfer case of the FDA drive Belarus MTZ-82.1, 82.2:
- set lever 7 to the position “FDA switched on forcibly” (upper fixed position, retainer ball 6 in the lower hole “A” of rod 4).
- unscrew the lock nut 3 by 2-3 turns, unscrew and remove the pin 1.
- turn the lever 11 clockwise until the transfer case 10 is fully engaged, i.e. the toothed clutch meshes with the outer and inner races of the freewheel clutch.
- rotating the fork 2, adjust the length of the rod 4 so that the pin freely enters the holes of the fork and lever 11, turned clockwise until it stops.
- tighten the lock nut, install and cotter the pin.
Adjusting the control thrust for the front drive axle drive distribution on the Belarus MTZ-82-1, 82-2 tractors with an awning frame based on a small cabin:
- set the handle 7 to the “FDA switched on forcibly” position (upper fixed position, stop 5 of thrust 4 in the upper groove “A” of pillar 6).
- unscrew the lock nut 3 by 2-3 turns, unscrew and remove the pin 1.
- turn lever 9 clockwise until transfer case 8 is fully engaged, i.e. the toothed clutch meshes with the outer and inner races of the freewheel clutch.
- rotating the fork 2, adjust the length of the rod 4 so that the pin freely enters the holes of the fork 2 and lever 9 turned clockwise until it stops.
- tighten the lock nut 3, install and cotter pin 1.
Adjustment of the FDA cardan drive
In the cardan drive Belarus MTZ-82.1, 82.2, adjust the safety clutch in the intermediate support and check the side play in the cardan shaft bearings.
Adjust the overload clutch to transmit a torque of 400 to 800 Nm. Adjust the coupling by tightening the nut of the rear shank of the intermediate support shaft until the required torque is transmitted.
Periodically check the side play in the bearings of the universal joints. If there is any play, disassemble the hinge and check the condition of the bearings and crosses, replace the worn parts. When assembling the cage of the oil seals, press them into the bearing until they stop.
The propeller shaft is dynamically balanced. When replacing parts during operation (pipes with forks of the hinge and flange), contact specialists.
Do not turn propeller shafts with pry bars, wrenches and other devices to avoid damage to the seals and damage to the bearings of the crosspieces.
Tractors have been successfully used for more than half a century in agriculture, housing and communal services, construction, forestry enterprises. In the post-Soviet space, the most common of them are the MTZ-80 and MTZ-82 tractors, which are manufactured by the Minsk Tractor Plant.The increased demand is caused not only by the high power, functionality and performance, but also by the durability of the devices.
However, these machines sometimes fail and require repairs. Simple tasks of restoring the operability of these tractors can be solved with your own hands.
Maintenance and repair of tractors are mandatory procedures that every owner of universal wheeled vehicles has to face. Before proceeding with the practical part, you need to familiarize yourself with the device, the main units of MTZ-80 and MTZ-82. On these models, the manufacturer installs 4-cylinder diesel engines of the 4CH11-12.5 series, produced by the Minsk plant. The engines have semi-divided liquid-cooled combustion chambers made in the piston.
Parts of the internal combustion engine were equipped with a pre-heater. The working volume of the power plant is 4.75 liters, and the rated power is 80 hp. The motor is started by an electric starter. Mechanical transmission with 22 gears (18 forward and 4 reverse). The clutch is single-disk, dry, closed. The 9-speed gearbox is equipped with a reduction gear. The rear axle has a differential with a locking function.
Tractors are characterized by: rigid rear wheel suspension, semi-rigid suspension with a balanced front wheel axle, disc brakes, power steering MTZ. The hydraulics include: an NSh-32 pump driven by the engine, a hydraulic cylinder for controlling a mounted plow, a slide-valve hydraulic distribution. The MTZ-80 model has a rear-wheel drive and a small cab. MTZ-82 is an all-wheel drive vehicle.
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Maintenance of the MTZ-80 and MTZ-82 tractors has a planned preventive nature. It is produced with the aim of maintaining equipment in a working, serviceable condition, increasing efficiency, reliability, and extending the service life. A maintenance system has been installed for the machines. It includes 3 numbered and periodic maintenance, labeled under No. 1,2 and 3. As additional maintenance, seasonal operations are carried out.
- the first maintenance is carried out every 60 hours of operation;
- the second - every 240 hours of operation;
- the third - every 960 hours of operation.
In between shifts, monthly maintenance is performed, which is 10 hours of work. In this case, the following actions are carried out:
-
- Check for oil, fuel, electrolyte and water leakage.
- The filtered fuel is added to the diesel and starting engine tank.
- Measure the oil level in the crankcase, check the water level in the radiator.
- The condensate is drained from the receiver.
- Check the degree of clogging of the air cleaner.
Numbered TO provide for the above stages and specific ones. Seasonal ones are required when switching to autumn-winter period from spring-summer and vice versa.
Do-it-yourself current repair of MTZ-80 and its “successor” MTZ-82 provides, first of all, the removal of faulty assemblies and parts with their subsequent replacement with repaired or new ones.
Disconnecting the rear axle of the Belarus tractor
When carrying out this procedure, one should be guided by the following principles:
- disassembly of the tractor or its assembly unit is carried out within the limits necessary to identify the cause of the malfunction and its elimination;
- it is necessary to remove the unit only if it is not possible to eliminate the malfunction in another way.
For the MTZ-80, MTZ-82 models, parts and assemblies are mounted on a semi-frame frame, consisting of a front half-frame. The latter is used to install the internal combustion engine. Dismantling of tractors begins with disconnecting the frame, removing the units. Dismantling requires the use of: a manual or electric hoist, a crane-beam and other devices. When repairing tractors, pay special attention to the assembly sequence with subsequent adjustment of parts, assemblies and drives. If current repairs can be carried out at home, (both outdoors and in a special room), then to carry out a major overhaul, you will have to contact a specialized center that has instrumentation and equipment for this.
Defect detection of working elements is carried out after flushing in order to detect the presence of wear, cracks, chips, scratches on their surfaces. After examining the worn parts, their dimensions and shapes are checked, for which a measuring tool is used. To establish the possibility of carrying out repairs, the interaction of the unit with the associated part is checked, more often by replacement. Replacement takes place when the dimensions of the part, as a result of wear, interfere with the operability of the mechanism.
The design of the tractors allows some parts to be replaced without preliminary dismantling, namely: an air cleaner, a generator, a centrifugal oil cleaner, a starter, a fuel pump, a hydraulic distributor mechanism, a power take-off shaft, an intermediate support for a propeller shaft, a compressor, a transfer case.
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To repair the transmission, disconnect the frame of the machine. The tractor is rolled out on planes according to the scheme: clutch housing - MTZ-80/82 gearbox - rear axle. Install a fixed jack stand under the rear axle, movable ones are placed under the clutch housing and gearbox. Then they disconnect, roll out the skeleton, remove the box.
In the event that malfunctions were detected when turning on / off the first gear, reverse gear, then it is necessary to remove the side cover and the shift fork. The last part requires replacement when the gap is more than 1.5 mm. Determine the size of the gap by alternately connecting the fork to the slots of the sliding carriages. The gear block is changed when the groove width exceeds 10.8 mm.
When there are extraneous noises in the gearbox, excessive heating of the housing is noticed, this indicates a seizure or destruction of the shaft bearings. To fix the problem, drain the oil from the MTZ gearbox. Use a crowbar to turn all the shafts accessible for inspection. They need to be influenced in the radial and axial directions. Bearing races must not rotate in their seats. If it is found: movement of the shafts, wear of the bearings, the gearbox is removed from the tractor, disassembled with the replacement of faulty bearings.
Gearbox repairs can be triggered by knocks that disappear when shifting to the next gear. In this case, problems arise in the gear teeth. Check for wear by jacking one of the drive wheels, spinning it and inspecting the teeth of the visible gears. If the defect is visible with the naked eye, the parts are replaced.
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The internal combustion engine is removed assembled from the tractor when cracks, knocking of connecting rod or main bearings are detected in the cylinder block. First, the crankshaft journals and connecting rod bearings are tested for functionality. It is necessary to remove the oil pan, oil pump, oil lines, connecting rod caps. Measure the diameter of the crankshaft journals in 2 planes - perpendicular and parallel to the longitudinal axis of the connecting rod. With a decrease / increase in diameter, the crankshaft is removed and given for regrinding.
To find out whether it is worth replacing the connecting rod bearings of the MTZ-80, MTZ-82 engine, measure the size of the connecting rod bearing bore. In this case, its cover must be tightened. The design clearance ranges from 0.05 to 0.12 mm, and the excess of the allowable clearance is limited to 0.3 mm.
D 242 engine after overhaul
On MTZ-80 tractors, special attention will be paid to engine repair. If the oil level rises in the diesel engine crankcase, it means that as a result of the formation of cracks, the tightness of the liner seals is broken. It is possible that water has entered the cylinder block from the cooling system. A high pressure reading or a low reading indicates a malfunction with the oil pump, misalignment, worn bypass and drain valves, or a faulty thermostat valve.Check the oil pressure, if the indicator is below 0.08 MPa, stop the engine, adjust the drain valve, wash the filter parts.
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Repair of electrical equipment is carried out in case of malfunctions of the generator and starter. The generator is checked by turning on the electricity consumers, setting the crankshaft rotation speed corresponding to the nominal one. After connecting to a voltammeter and smoothly increasing the current to 30 A, measure the voltage (the permissible value is not less than 12.5 V). The difference between the generator voltage and the nominal makes it necessary to replace the part.
Pre-check the main elements for a malfunction with a warning lamp. Remove the back cover and the EUT, release the coil leads from the panel bolts. At the end of these steps, proceed to check for a short circuit between the generator case and the windings of the tractor electrical equipment. Defects in insulation and diodes lead to replacement.
Installing the battery on MTZ over the rear axle
The starter is examined using KI-1093, a portable device. Remove the wire from the storage battery leading to the starter, put on the “+” terminal a volt-ammeter connected to the KI-1093. Put in top gear. After making sure that no fuel is flowing, turn on the starter for 7-10 seconds. to monitor the readings of measuring instruments.
A small voltage indicator indicates a discharged or malfunctioning AB, oxidation of the clamps. An increased value of the current that the starter consumes indicates an interturn short circuit of the armature windings. If you notice the rotation of the armature during the check, look for a malfunction in the clutch mechanism. In all these cases, it is advisable to replace the starter with a new one.
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Repair of Onboard MTZ / part - 1 disassembly.
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Recovery MTZ Hood, disks, distributor and more. Repair of the MTZ tractor. Series No. 1
With this technique, the most difficult thing was to wash off fuel oil. And so a couple of dents, replaced the grilles on the hood, sheathed.
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
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 appearance of traces of grease on the propeller shaft flange and the main gear housing of the MTZ-82 tractor indicates a loss of elasticity or destruction of the drive gear cuff.
In the process of repair, when replacing the collar of the driving gear of the main gear of the gearbox of the driving front axle of the MTZ-82 tractor, the driveshaft is disconnected, the castle nut is unscrewed and the cardan flange is removed.
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. 1).
Rice. 1. Mutual arrangement of parts of the main gear of the front drive axle PVM MTZ-82
1 - driving gear; 2, 5 - bearings; 3 - shims; 4 - glass; 6 - cuff; 7 - oil seal holder; 8 - flange; 9 - nut
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. 1). Then the two bolts of the radial bearing are unscrewed, the driven gear is removed and the wheel flange is pressed out (Fig. 2). A glass of cuffs and a glass of an outer cage
The bearing is pressed out with two mounting bolts.
Rice. 2. Mutual arrangement of parts of the MTZ-82 final drive gearbox
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. 3. Removing the driven gear of the reducer when repairing the front drive axle of the MTZ-82 tractor
1 - driven gear; 2 - gear cover; 3 - bearing
Heating of the housing of the upper conical pair of the wheel gearbox PVM MTZ-82 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 joints
pendants.
During the repair process, to replace the suspension parts of the MTZ-82 FDA, 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 under the pipe: nominal - 88 + 0.035 / permissible - 88.5
The outer diameter of the vertical shaft pipe under the sleeve: nominal - 87 -0.080-0.125 / permissible - 87.1
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 gearbox housing of the drive front axle of the MTZ-82 tractor PVM indicate destruction or extreme wear of the bearings of the drive gear of the main drive or differential, for chips or chipping of the teeth of the bevel gears of the main gear.
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 MTZ-82 front axle is hung out, 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 an assembly crowbar, inspection of the parts
differential (fig. 4).
Rice. 4.Mutual arrangement of body parts, cover and differential of the front drive axle of the MTZ-82 tractor
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. 5).
To disassemble the MTZ-82 PVM differential, unscrew the bolts tightening 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 for
external surfaces and, if necessary, restore it.
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, the axial clearance in the bearings of the main gear and the differential of the MTZ-82 FDA is adjusted and the main gear is installed in the axle body. Then check and, if necessary, adjust the lateral clearance between the teeth of the bevel gears.
Rice. 5. Removing the main gear and the differential of the gearbox of the leading front axle of the MTZ-82 tractor
1 - main gear; 2 - differential; 3 - case
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, they replace defective parts and control those surfaces that are subject to the most intense wear.
Dimensions of FDA MTZ-82 parts (nominal / permissible), mm
Outer diameter of the semi-axle and vertical shaft for bearing 5707
35 ± 0,008 / 34,9
Inner diameter of the case of the tapered pair and the pipe of the vertical shaft for bearing 5707
79+0,020 / 72,1
Internal diameter of the gearbox housing PVM MTZ-82:
Bearing 208
80+0,023 / 80,1
Bearing 36209K1
85+0,023 / 85,14
The outer diameter of the driving gear of the lower bevel pair of MTZ-82:
Bearing 208
40+0,020 / 39,9
Bearing 36209K1
45+0,020 / 44,9
Outside diameter of the flange of the wheel disk FVM mtz-82:
Bearing 2310K
50± 0,008 / 49,9
Bearing 7212
60-0,020 / 59,9
Inner diameter of a glass of bearings of a flange of a disk of a wheel for a bearing 7212
110-0,035 / 110,1
In the case of replacing the bearings of the wheel reduction gear of the leading front axle of the MTZ-82 tractor and its parts, as well as checking its technical condition, a number of control and adjustment works are carried out, including monitoring and adjusting the wheel flange bearings, checking the correctness
assemblies of the upper and lower bevel pairs of wheel reduction gears.
To check the technical condition of the bearings, remove the wheel flange, fix the measuring device on the gearbox housing and wipe the indicator leg into the flange. By moving the flange in the axial direction to failure, the indicator reading is determined.
When the indicator readings are more than 0.5 mm, the tapered bearings of the front axle of the MTZ-82 tractor are adjusted by changing the total thickness of the adjusting rings, which are located between the inner bearing races, by selection or processing on a lathe. The correct selection of the adjusting rings without assembling the gearbox can be checked using a tool.
The pipe of the device is abutted against the end of the inner bearing race and the clearance in the bearings is selected by screwing in the bolts. Having installed the indicator, tighten the bolts. If there is a gap in the bearings, the gear cover, together with the tripod and the indicator, will move upward on its
magnitude.
To check the correct assembly or to assess the technical condition of the teeth of the gears of the upper and lower bevel pairs of the final drive, measure the lateral clearance between the teeth. It is determined by the amount of movement of the MTZ-82 wheel disk mounting bolt.
By turning the wheel disc (the axle shaft must be fixed), determine the total clearance in the final drive gears. If the indicator reading exceeds 1.0 mm, measure the side play in the gear teeth of the lower bevel pair separately. Remove the gearbox cover, fix
vertical shaft and repeat the measurements.
Rice. 6. Adjusting the clearance of the lower bevel pair of the MTZ-82 final drive reducer
1 - shims; 2 - wheel flange
Rice. 7. Adjustment of the gap of the upper bevel pair of the final drive gearbox FDA MTZ-82
1 - semi-axle body; 2 - king pin pipe; 3 - adjusting shims
The difference between the first and second measurements corresponds to the gap in the teeth of the upper bevel pair of gears of the reduction gear of the leading front axle of the MTZ-82 tractor. The permissible value of the indicator readings when measuring the clearance in the teeth of the upper and lower pairs of gears, which determines
the possibility of further operation of the gearbox without adjustment, - 1.0 mm.
To reduce the gap between the teeth of the lower comic pair, the bolts for fastening the wheel flange bearing cup are unscrewed through the technological holes and the cup is pressed with two mounting bolts until the two packs of gaskets are released. Some of the gaskets are removed (Fig. 6). In this case, the thickness of the remaining bags must be the same.
The lateral clearance in the lower bevel pair of the gearbox of the driving front axle of the MTZ-82 tractor may increase due to wear or destruction of the bearings of the driving gear. To check the condition of the bearings, remove the bottom cover and move the drive gear by hand in the axial and radial directions.
To adjust the clearance in the gear teeth of the upper bevel bunk, the bolts of the reducer and the pipe flange are unscrewed, and then the vertical shaft pipe is pressed out of the bevel pair housing with mounting bolts (Fig. 7). By removing some of the spacers, the mesh in the engagement is reduced.
If it is not possible to achieve a noticeable decrease in the gap by changing the thickness of the package of gaskets, using an indicator device, the axial displacements of the semi-axis and the vertical shaft are measured - the degree of tightening of their tapered bearings is monitored. Permissible axial displacements of the shafts are 0.5 mm.
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Axial play can be caused by self-loosening of the round bearing nuts. The gap is adjusted by tightening the round nuts to failure and then unscrewing them by 10-15 °. The shaft bearings are tightened correctly if the axial movement of the shafts is between 0.05 and 0.15 mm. After
adjusting the shafts must turn in the bearings by hand.
