DIY repair of the MTZ 82 gap

In detail: do-it-yourself repair of the MTZ 82 gap from a real master for the site my.housecope.com.

Universal row-crop tractors "Belarus" MTZ-80, MTZ-82 are among the best domestic tractors. Every year their design is being improved, quality is improving, efficiency, reliability and maintainability are increasing. They are widely recognized by machine operators.

At the same time, tractor downtime is still long due to failures and malfunctions, the occurrence of which is often due to the low culture of machine operation, the unsatisfactory quality of repairs.

The main reference material when carrying out repairs for tractor drivers and mechanics-repairmen is the instruction manual for the MTZ-80, MTZ-82 tractors, published by the factories and the supplier. Despite the informativeness of the instructions, the data contained in it on the design, repair, etc. and replaceable tools, pullers, fixtures, instrumentation, on the basic rules and sequence of disassembly and assembly of the tractor are insufficient. As a result, even experienced machine operators often disassemble the tractor and its components at random. Due to the lack of data on fault detection, many parts fit for work are replaced, which leads to an increase in the cost of repair.

This manual can provide practical assistance to machine operators, mechanics-repairmen of workshops of collective and state farms, tenants. It contains information about the causes of malfunctions and methods of their elimination, shows the correct techniques for performing disassembly and assembly and adjustment work during the current repair of the MTZ-80, MTZ-82 tractors.

We should take into account that manufacturers are constantly improving products in order to increase their reliability and better suitability for service. Therefore, the design of some of the parts shown in the figures may differ from the design of parts of a real tractor, which is at the consumers' disposal.

Video (click to play).

The manual was prepared by the staff of GOSNITI F. N. Pukhovitsky and S. V. Petrov (compilers), O. M. Kopylov, E. Zh. Sapozhnikov.

If you have replaced the friction linings, check that the rivet heads must be at least 2.0 mm deep. The pads, of course, fit snugly against the disc. A small gap of up to 0.1 mm is not critical and radial cracks in the linings in the rivet area without going over the edge or into another hole for the rivet.

If the thickness of the driven disc is not less than the permitted value, and if the rivet heads sag below the plane of the lining by 0.1 mm or even less, then these friction linings are replaced together.

Next, the pressure plate is diagnosed. Its reference plane should not have ring marks with a depth of more than 0.2 mm, as well as marks from burn-through and cracking marks of more than 40% of the entire surface. The working plane of the pressure plate is ground or grinded until there are no signs of wear. Then gently clean it with fine sandpaper to a finished state.

The clutch is assembled with a special tool (see Fig. 2.5.2). Previously, as noted above, the technological bolts are screwed in to compress the pressure plate spring and fix it in this position. A special shaft is placed in the inside of the flywheel bearing (Fig. 2.5.3), which is required for the verified installation of the spline hubs of the driven discs and ensuring their alignment with the flywheel.

Then the process bolts are unscrewed from the housing and the process splined shaft is removed.

Rice. 2.5.4. Adjustment of the clutch and brake of the MTZ tractor:
1 - support bearing; 2 - release lever; 3 - pedal lever; 4, 8 - brackets; 5 - brake thrust; 6 - plug; 7 - stop bolt; 9 - thrust; 10 - bracket mounting bolt

Rice. 2.5.3. Centering of the driven disc of the MTZ tractor:
1 - technological shaft;
2 - support disk

Rice. 2.5.5. Adjustment of the clutch release levers of the MTZ tractor:
1 - release lever;
2 - technological shaft

Free travel of the clutch pedal (Fig. 2.5.4) is adjusted by rotating the rod 9. In the released position, the lever 3 of the pedal rests on the floor of the cab. If this does not happen, smoothly unscrew the stop bolt 7 from the bracket 8. If this is not enough, release the bracket fixing bolt 10 and twist the bracket to the spring (clockwise).

If you did everything correctly when adjusting the clutch release mechanism and observing the size 12 ± 0.5 mm, the gap between the protrusions of the levers 2 and the support bearing 1 should be 3 ± 0.5 mm (how to adjust the clutch release levers is shown in Fig.2.5.5) ...

Adjustment of the brake layering is carried out as follows (see Fig. 2.5.4). First, remove the rod 5 from the bracket 4, scroll the bracket 4 to the right (counterclockwise) to failure; turning the fork 6, they achieve an increase in the thrust 5 until the easy connection of the fork 6 and the bracket 4. Next, turn the fork 6 until the total length of the thrust 5 decreases by 7 mm. In the resulting state, the plug is connected to the bracket. According to the results of the adjustment, the fork is fixed with a lock nut.

Most often, the breakdown of the gearshift mechanisms of the reduction gear appears due to spontaneous shutdown and heavy gear shifting, the occurrence of noise and knocking.

For no reason, the gears are turned off when the teeth of the gears and toothed couplings are worn out and chipped, the clips and the recesses for them on the gear shift shafts break. It happens that the elasticity of the retainer springs is lost, the friction plane of the shift forks, the link, the annular grooves of the sliding gears and gear couplings wears out.

Heavy engagement of gears, rattling are caused (along with incomplete disengagement of the clutch) a violation of the brake adjustment, incorrect operation of the locking mechanism.

Loud noises and knocks in the gearbox occur due to the following main reasons: due to failure of the shaft bearings, the development of bearing seats in the housing, when the shaft alignment changes, a small volume of oil in the crankcase, cracks and breakdowns of parts.

The above breakdowns appear not only due to the usual wear of the mechanisms, but also due to improper operation of the tractor, ignoring the technical conditions when repairing the tractor.

For example, premature wear of bearings and gear teeth in thickness can result from the presence of abrasive particles in the oil that is poured into the transmission case. They can also penetrate the grease through leaks. Failure of the gear teeth on the engaging side occurs due to erroneous clutch adjustment, incorrect gear shifting and inaccurate alignment of the clutch shaft brake. Breakage of gear teeth due to metal fatigue is accelerated when pairs of gears enter incorrectly, they are insufficiently turned on, and the engagement of bevel pairs is unclear. When working on a tractor, a bunch of faults can be easily eliminated directly on it.

If during tractor operation you can hear

The grinding of gears that appears when shifting gears tells us about incorrect adjustment of the clutch control mechanism and the failure of its discs. The wear of the friction discs and the brake is also possible, wear of the coatings at the junction of the fork and the pin of the brake cutoff (Fig. 2.5.6).

Rice. 2.5.6. Clutch and reduction gear of the MTZ tractor:
a - general view; b - mutual arrangement of parts;
1 - damper; 2 - driven disk; 3 - pressure plate; 4 - support disk; 5 - release lever; 6 - support bearing; 7 - layering; 8 - layering bracket; 9, 15, 16, 26, 39, 40, 54, 58, 62 - rings; 10 - cuff; 11 - oil deflector washer; 12, 14, 18, 27, 29, 38, 56, 61 - bearings; 13 - persistent sleeve; 17 - intermediate gear; 19 - gear axle; 20 - fixing screw; 21 - clutch housing; 22, 50, 63 - gaskets; 23,24 - covers; 25 - PTO drive shaft; 28 - thrust washer; 30 - brake cutoff bracket; 31 - inclusion plug; 32 - brake layering; 33 - brake disc with pad; 34 - gear clutch; 35 - clutch shaft; 36 - gear; 37 - support cover; 41, 44 - levers; 42 - shaft of clutch forks; 43 - brake rod; 45 - shaft of forks of inclusion; 46 - clutch cover; 47 - fork for switching PTO stages; 48 - PTO gearshift shaft; 49 - bottom cover; 51 - needle bearing; 52 - PTO drive shaft; 53 - clutch; 55 - PTO drive gear (stage II); 57, 60 - spacer washers; 59 - PTO drive gear (stage I); 64 - bearing cover

When the tractor is operating, it is likely that other breakdowns and failures of gear change mechanisms are likely to occur. To eliminate them, remove the clutch housing and disassemble in the same order as in fig. 2.5.11-2.5.28.

The increased free play of the reduction gear stage change lever is due to the wear of the shift fork and the groove of the gear clutch.

To check this guess, fold the fork, push it into the groove of the gear clutch and determine the gap. If the gap is more than 3 mm, the coupling and the fork must be replaced. To replace the gear clutch, roll out the skeleton and separate the clutch housing from the gearbox.

Rice. 2.5.7. How to remove the control mechanism of the reduction gear and the toothed clutch of the MTZ tractor:
1 - control mechanism;
2 - clutch shaft

Rice. 2.5.8. Pressing out the clutch shaft and removing the brake drive disc of the MTZ tractor:
1 - technological bolt;
2 - clutch shaft

Rice. 2.5.9. How to remove the support bearing, layering, switching forks and clutch forks of the MTZ tractor:
1 - layering;
2 - plug;
3 - shaft of clutch forks

Rice. 2.5.10. Removing the brake layer of the MTZ tractor:
1 - brake layering;
2 - inclusion plug;
3 - shaft of forks of inclusion

Rice. 2.5.11. Removing the retaining ring of the clutch shaft bearing of the MTZ tractor:
1 - retaining ring;
2 - clutch shaft;
3 - support cover

Rice. 2.5.12. Pressing the support cover from the clutch shaft of the MTZ tractor:
1 - support cover;
2 - clutch shaft;
3 - puller

Rice. 2.5.13. Removing the intermediate gear wheel of the hydraulic pump drive of the MTZ tractor:
1 - intermediate gear;
2 - locking screw

Rice. 2.5.14. Pressing out the bearing from the intermediate gear wheel of the hydraulic pump drive of the MTZ tractor:
1 - bearing;
2 - tutorial;
3 - gear

Rice. 2.5.15. Pressing the brake layering bracket of the MTZ tractor:
1 - brake cutout bracket;
2 - technological bolt;
3 - bolt

Rice. 2.5.16. Pressing out the bearing from the brake tappet bracket of the MTZ tractor:
1 - bearing;
2 - bracket;
3 - collet;
4 - inertial puller

Rice. 2.5.17. Pressing the branching bracket of the MTZ tractor:
1 - layering bracket;
2 - technological bolt

Rice. 2.5.18. Pressing out the bearing of the PTO drive drive shaft from the branching bracket of the MTZ tractor:
1 - bearing;
2 - layering bracket;
3 - puller

Rice. 2.5.19. Removing the bottom cover assembly with the fork for switching the PTO drive stages of the MTZ tractor:
1 - cover;
2 - bolt

Rice. 2.5.20. Removing the cover of the driven shaft of the PTO drive of the MTZ tractor:
1 - cover;
2 - bolt

Rice. 2.5.21. Unscrewing the bolt fastening the driven shaft of the BOM drive of the MTZ tractor:
1 - fastening bolt

Rice. 2.5.22. Pressing out the driven shaft of the PTO drive shaft, removing the gears of the I and II stages, removing the coupling of the MTZ tractor:
1 - tutorial;
2 - clutch housing

Rice. 2.5.23. Pressing out the bearing from the clutch housing of the MTZ tractor:
1 - bearing;
2 - clutch housing;
3 - inertial puller

Rice. 2.5.24. Removing the retaining ring of the gears of the I and II stages of the BOM drive of the MTZ tractor:
1 - gear wheel of the II stage;
2 - gear of the 1st stage;
3 - retaining ring

Rice. 2.5.25. Pressing off the gears of the I and II stages of the BOM drive of the MTZ tractor:
1 - gear wheel of the 1st stage;
2 - gear wheel of the II stage;
3 - puller

Rice. 2.5.26. Pressing the bearing from the gear wheel of the first stage of the BOM drive of the MTZ tractor:
1 - bearing;
2 - gear wheel of the 1st stage;
3 - puller

Rice. 2.5.27. Pressing out the needle bearing of the driven shaft of the PTO drive of the MTZ tractor:
1 - needle bearing;
2 - clutch housing;
3 - inertial puller

Rice. 2.5.28. Pressing out the bearing from the driven gear of the II stage of the PTO drive of the MTZ tractor:
1 - bearing;
2 - gear wheel of the II stage;
3 - collet;
4 - inertial puller

I disassembled the tractor clutch housing to replace the power shaft, I also changed all the oil seals and seals.

repair intervals MTZ at the time of uploading the video, the repair is almost finished, as I said, I did not have time to insert it.

Friends . Hello everyone on the tractor driver's channel, my name is Sergey, I am engaged in the land, repairing tractors, by.

This video shows how to remove the MTZ-80/82 power shaft. Removal is carried out already on the removed clutch housing.

He took off the top and side covers, checked the insides of the gearbox, bridge, and gaps.

I rolled out the MTZ 80 tractor, removed the gap for repairs.

This video shows how to install the PTO output shaft into the housing.

This video shows how to remove the secondary shaft of the PTO drive of the MTZ tractor.

Friends . Hello everyone on the tractor driver's channel, my name is Sergey, I am engaged in the land, repairing tractors, by.

This video shows how to replace the bearings on the gears of the PTO output shaft.

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Tell me how to adjust the engagement of the vertical shaft with the horizontal, final drives in the MTZ-82 FDA.
And is the kingpin pipe of the old and new designs interchangeable? DIY MTZ-80 (82) repair https://my.housecope.com/wp-content/uploads/ext/967/node/51831. Please continue communication here. The old theme will be archived

Guys tell me what to do so that they could not start the tractor. The thing is, as I go on a day off, they take my tractor, because they have their own. I’m tired of swearing and the engineer says don’t regret, damn, but I’m sorry that one or the other will be broken off, it came to a fight once. fights. it’s worth the launcher, about the launcher not to offer, he did and magnetically blocked and blocked the air, what can be done like this so that the diesel engine is not started, but do not disassemble anything so that it comes, cleaned and started,

tired of swearing and the engineer says do not regret

Engineer nah. Let him twist the nuts at least once.

tell me where is this valve on the pump,

the valve on the high-pressure fuel pump is installed - the return flow from the high-pressure fuel pump is drained on old tractors, the tube went to the pump to a double fitting, on the new one from this valve, the return flow goes directly to the tank fitting, turnkey 19, and there is a cork 14 in it. under it there is a spring and a ball. there will be no pressure in the filters, the tractor will not start, no matter how much you pump it, but over time they will bite out and they will screw it from another tractor or from a KAMAZ-there is the same.

unscrew the large plug on the pumping pump (the key is probably 32), take out the spring and twist it back, this will be the fastest. I tried with the valve, but the tractor still started up, maybe under load and wouldn’t be lucky, but I didn’t try

the eyes are afraid and the hands are doing

He's like they have no time, and they themselves sit for half a day in the stern of the warehouse, so I'm sorry that I'm wiping their asses.

Here, the root cause of evil. Anti-theft to the light bulb, in revenge, the workers can do this to you.

Who will fuck later ?, but you. Half measures cannot solve the problem.

Made a light bulb as prompted. Hooray! Working! Thanks!

Guys who will tell you what can be done with a plastic tank lid so that it does not leak, or can someone redo it share

Only the one who does nothing is not mistaken

Guys who will tell you what can be done with a plastic tank lid so that it does not leak, or can someone redo it share

Did you try to put the rubber gasket into the cork?

I don’t know this option will suit you, I have a metal tank, I didn’t like this narrow neck and I picked up the thread so that it screwed onto the neck and welded this thread to the neck of the GA Z53, and then screwed it onto the neck of the tractor.
If you are interested in the idea, contact me, I will provide a photo.

Guys who will tell you what can be done with a plastic tank lid so that it does not leak, or can someone redo it share

Hi everybody! please tell me who knows or had to. can antifreeze be poured into MTZ? since there is no expansion barrel from the factory. I had a dispute with my superiors.that it is possible to fill in antifreeze without an expansion tank, but it does NOT need only to put an expansion tank. I want to know who is right. tell.

Since 2003 I have been using antifreeze, but I haven’t heard about the expansion tank,

the eyes are afraid and the hands are doing

Hi everybody! please tell me who knows or had to. can antifreeze be poured into MTZ? since there is no expansion barrel from the factory. I had a dispute with my superiors. that it is possible to fill in antifreeze without an expansion tank, but it does NOT need only to put an expansion tank. I want to know who is right. tell.

in principle, antifreeze has a large expansion when heated, so there are two outputs - put an expander (you can from a bug, an Oise) or keep the level lower in the radiator - in practice, I get that the level is two centimeters below the level of the tubes. if I fill it above the tubes in the radiator (half a tank) then throws out a little antifreeze to a level of -1-2 cm. and then this level does not go down. I add a liter and a half-antifreeze comes out and it will be thrown out a day.

Universal - row-crop tractors MTZ-80 “Belarus”, MTZ-82 “Belarus” have been produced by the Minsk Tractor Plant since 1974. The target at that time was the creation of a tractor with a capacity of 75-80 hp. traction class 1.4.

In the 2000s, the above models were significantly upgraded. The design of the tractor has received many changes. In particular, a new cab with a deeply modernized engine was installed. Production employees managed to achieve seventy percent unification of parts and assembly units, which is also important for the repair of MTZ 80, 82 tractors.

Having received a small rebranding, the tractors entered the market under the brands “Belarus-80” and “Belarus-82”, respectively.

The traditional layout of the MTZ-80 tractor is based on a semi-frame structure with supporting crankcases for transmission units. The engine has received a forward location. Rear drive wheels have a significantly larger diameter relative to the front idler wheels.

Four-wheel drive is an advantage of the MTZ-82 tractor.

The plant has developed several modifications of the above models, which differ from each other in type, transmission ratios, engine starting method, attachment points for attachments, external design, type of rubber used, size of agricultural clearance, installation of systems ensuring operation on steep slopes. However, the repair of the MTZ 80, 82 tractors differs slightly.

These are the most common tractors in the CIS, owners of four-cylinder four-stroke family 4CH11 / 12.5 (only models D-240 and D-243) produced by the Minsk Motor Plant with a semi-divided combustion chamber made in a piston, liquid-cooled, a preheater PZHB-200B was installed on some of the engines.

The working volume of the engine is 4.75 liters. Rated power 59.25 kW (80 hp), originally 55.16 kW (75 hp).

Starting the engine during the repair of the MTZ 80, 82 tractor is carried out by an electric starter (modifications D-240/243), or a starting engine PD-10 (modifications D-240L / 243L), with a rated power of 10 hp [6], with start blocking at included gear.

The rigid suspension of the rear wheels on the driving axles has terminal connections, which allows the track width to be continuously varied within 1400-2100 mm. Front wheels with semi-rigid suspension are also adjustable within 1200-1800, but in steps (100 mm step).

A practical guide for the current repair of tractors MTZ-80, 82

Operating manual BELARUS 80.1 / 80.2 / 82.1 / 82.2 / 82R (repair of the MTZ 80, 82 tractor)

Description and repair of tractors MTZ-80, 82

Tractors "Belarus" MTZ-80, MTZ-80L, MTZ-82, MTZ-82L (repair manual for tractors MTZ 80, 82 and their modifications)

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, the manufacturer of which is 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 working order, good 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:

1. Check for oil, fuel, electrolyte and water leakage.
2. The filtered fuel is added to the diesel and starting engine tank.
3. Measure the oil level in the crankcase, check the water level in the radiator.
4. The condensate is drained from the receiver.
5. 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 overhaulOn 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.
to the menu ↑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 axleThe starter is examined using KI-1093, a portable device. Remove the wire from the battery leading to the starter, put a voltammeter connected to the KI-1093 on the “+” terminal. 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.Hello everyone, friends on my channel. I apologize for not often responding to comments, but you can callHere is my groupRepair of Onboard MTZ / part - 1 disassembly.HOME TEXTILE 100% LINEN All linen CONSTRUCTION OF A SIP HOUSE REPAIR IN THE KITCHEN MY Instagram: Vlog Channel: Vkonta .DIY 20 W energy saving lamp repair (broken filament), Tv Online free hd 2018 moviesdo-it-yourself muffler repair without welding vases.DIY Yamaha motorcycle repair. This model is made quite well, it is similar to the manufacturer W.During the current repair of MTZ-80, 82 tractors, the main content of the work is to remove faulty units and install new or repaired ones on the tractor.At the same time, the following basic principles are adhered to: the tractor, unit, assembly unit is disassembled within the limits necessary to identify and eliminate the causes of failures and malfunctions; units and assembly units are removed in cases where it is impossible to eliminate the malfunction without this.In tractors, the base on which all units are mounted is a semi-frame frame. It is formed by a front semi-frame for installing a diesel engine and transmission units connected to each other.Therefore, disassembling the tractor into units includes the following main types of work: disconnecting the frame and removing the units.For disassembly of the MTZ-80, 82 tractor, special devices and devices are used that allow reliable installation and removal, jacking, disconnection and rolling out of the tractor components.Dismantling and installation of units is carried out with special fights and traverses using a crane, electric or manual hoist.Unreasonable disassembly of the tractor and its aggregates violates the running-in of parts and reduces their service life, since after each disassembly the wear rate increases.If by external inspection of the tractor, cracks, breaks, nicks, bends, dents and other defects that affect the performance of the tractor are found visible without disassembling the mechanism, and when removing the units, it is found that the technical condition of the adjacent mechanisms requires replacement or repair of a number of parts, then the units are disassembled. , and parts and spare parts - troubleshooting.Troubleshooting of parts and spare parts is performed after washing, when traces of wear, chips, cracks, scuffs and scratches are clearly visible on the surfaces.Worn parts and spare parts MTZ-80, 82 are inspected, and then their shape and dimensions are checked with appropriate measuring instruments and devices. At the same time, a conclusion is made on the advisability of replacement or repair.To establish whether a part can be repaired or if it needs to be replaced, sometimes the interaction of the part with another mating part, for example, a shaft with a gear or a shaft with a body, is checked.A part is replaced if, as a result of wear, its dimensions disrupt the operability of the mechanism or cause its intensive wear.The design of the tractor is such that some of the units can be replaced without additional disassembly operations, and some require preliminary dismantling.So, without preliminary disassembly, you can remove the air cleaner 12, the centrifugal oil cleaner 7, the generator 6, the pump and hydraulic distributor, the starting engine 17 (or starter), the compressor 14, the power take-off shaft 9, the transfer case 24, the intermediate support of the propeller shaft 23 (MTZ- 82), front axle or driving axle 21 (Fig. 1.1).Rice. 1.1 Layout of units on tractors MTZ-80, 82a — right side view; b - left side view; c - right side view (MTZ-82); 1 - water radiator; 2 - oil cooler; 3 - hydraulic booster (steering; 4 - water pump; 5 - oil pump; 6 - generator; 7 - centrifugal oil cleaner; 8 - clutch housing and reduction gear; 9 - power take-off shaft; 10 -
pneumatic adapter; 11 - rear linkage hydraulic cylinder; 12 - air cleaner; 13 - cylinder head; 14 - compressor; 15 - fuel pump; 16 - diesel (MTZ-80L, MTZ-82L); 17 - starting engine; 18 - rear hitch; 19 - transmission; 20 - starting motor reducer; 21 - front driving axle; 22 - cardan shaft; 23 - intermediate bearing of the propeller shaft; 24 - transfer caseTo remove other units, you need to dismantle the hood parts (Fig. 1.2-1.4), the empennage or the cab, the rods, hydraulic pipelines, and electrical fittings.With the hood removed, you can dismantle the water 1 and oil 2 radiators (Fig. 1.5, 1.6), power steering 3, - water pump 4, diesel 16, cylinder head 13, front axle 21 (see Fig. 1.1).Rice. 1.2. Removing the headlight bracket and hood sidewall1 - headlight bracket; 2 - sidewall of the hoodRice. 1.3. Removing the front hood grille MTZ-80, 821 - front hood grill; 2 - fastening boltRice. 1.4. Removing the hood1 - the hood; 2 - fastening boltsRice. 1.5. Disconnecting and removing the oil coolera - left view, b - right view; 1 - oil cooler; 2 - mounting bolts; 3 - pipelines; 4 - power steeringRice. 1.6. Disconnecting and removing the water radiatora - left view; b - right side view; 1 - water radiator; 2 - mounting bolts; 3 - radiator shutter cable; 4 - radiator mounting bracket; 5 - pipelines; 6 - nutThe MTZ-80, 82 cab is removed when repair is required of the clutch housing and the reduction gear (hereinafter referred to as the clutch housing) 8, gearbox 19, rear axle, rear power take-off drive, power cylinder 11 or power regulator.To remove the complete cab, remove the rear radiator lining, disconnect the control rods from the cab. Then remove the springs of the brake valve and brake pedal levers, disconnect and remove the clutch and brake control pedals, disconnect the heating system pipelines, and
also fastening the cab to the brackets (Fig. 1.7).After that, disconnect the wire from the battery to the starter (Fig. 1.8) and the electrical wires from the instrument panel (Fig. 1.9), remove the handles from the control levers of the reduction gear and the gearbox.Disconnect the tachospeedometer cable, wires from the sound signal and headlight blocks. Remove the rubber mat and floor box, disconnect the fuel pedal.Having unscrewed the mounting bolts located inside and below the cab, remove the floor (Fig. 1.10).Disconnecting the power regulator control handle, remove the sector assembled with the power regulator control lever (Fig. 1.11).And, finally, after removing the terminals, remove the storage batteries and disconnect the "ground" wire from the tractor cab (Fig. 1.12). After completing the listed operations with the lifting mechanism, the cab is removed from the tractor using a scraper.Rice. 1.7. Disconnecting the MTZ-80, 82 caba - left view; b - right viewRice. 1.10 Removing the cab floora - left view; b - right viewRice. 1.11. Removing the sector assembled with the power (position) regulator control lever 1 - bracket; 2 - toothed sectorRice. 1.12. Disconnecting the ground wire from the tractor cab 1 - mounting bolt; 2 - wire "mass"To repair the clutch, gearbox, rear axle and when replacing the diesel engine, front axle or front drive axle, the tractor frame is disconnected. Diagrams of disconnecting and rolling out tractor components using the OR-16346 stand are shown in Fig. 1.13.Rice. 1.13. Disconnection and rolling out of the components of the MTZ-80, 82 tractora - disconnecting the semi-frame with a diesel engine from the clutch housing; b - disconnecting the clutch housing from the gearbox; c - disconnecting the gearbox from the rear axle; d - disconnection and removal of the gearbox; 1 - rear axle; 2 - gearbox; 3 - clutch housing; 4 - fixed stand; 5
- side members of a semi-frame with a diesel engine; 6 - movable supports; 7 - guidesWhen removing the diesel engine, the front half-frame is rolled back on the stand. In this case, the fixed stand-jack of the stand is installed under the clutch housing, and the movable ones - under the side members of the half-frame and under the front axle or the front driving axle.After that, by rotating the screws of the jacks, the front of the tractor is hung out until the wheels are lifted off the floor and the operations are performed to disconnect the electrical wires and pipelines (Fig. 1.14-1.19), the steering shaft and the half-frame. Then the semi-frame is rolled back.Rice. 1.15. Disconnecting electrical wires, pipes and steering shaft (top view)Rice. 1.17. Disconnecting pipelines from power steering 1 - power steering; 2 - oil coolerTo repair the clutch and the MTZ-80, 82 gearbox, the semi-frame with a diesel engine is disconnected from the clutch housing. If it is necessary to replace individual parts of the reduction gear and the gearbox, then disconnect the clutch housing from the gearbox.For this, a fixed stand of the stand is installed under the gearbox, and the movable ones - under the clutch housing and the front axle. Then hang the front of the tractor, disconnect the rods and pipelines of the hydraulic system, disconnect and roll out the frame.If you need to replace the clutch housing in the gearbox or remove it for repair, the tractor frame is disconnected along the planes: diesel - clutch housing - gearbox. For this, a fixed stand of the stand is installed under the gearbox, and the movable ones - under the clutch housing and under the side members of the semi-frame.Then disconnect the electrical wires, the steering shaft, the semi-frame, the hydraulic pipelines from the housing of the hydraulic units, the power regulator and the rear axle, the traction, the electrical wires and pipelines from the clutch housing and the gearbox.Remove the housing of the hydraulic units, disconnect the cardan shaft (MTZ-82) and then roll out the tractor frame.Rice. 1.25. Disconnecting the propeller shaft, removing the transfer case1 - cardan shaft; 2 - transfer case; 3 - boltsWhen troubleshooting the rear axle and the MTZ-80, 82 gearbox, it is disconnected from the rear axle. For this, the fixed stand of the stand is installed under the rear axle, and the movable ones - under the gearbox and under the side members of the semi-frames.Disconnect the pipelines of the hydraulic system, traction and electrical wires, remove the gearbox cover, unscrew the bolts located under the top cover and under the transfer case (Fig. 1.26-1.29), the bolts to the rear axle (Fig. 1.30, 1.31) and then disconnect and roll out the skeleton of the tractor.Rice. 1.26. Disconnecting the piping from the power regulator1 - pipelines; 2 - power regulatorRice. 1.27.Disconnecting the piping from the rear axleRice. 1.28. Disconnecting the pipes from the differential lock housing1 - pipelines; 2 - the body of the differential lock mechanismRice. 1.29. Removing the transmission coverRice. 1.30. Unscrewing the bolts securing the gearbox to the rear axle MTZ-80, 821 - gearbox housing; 2 - boltRice. 1.31. Unscrewing the bolts securing the gearbox to the rear axle located under the transfer case1 - gearbox housing; 2 - boltIf you need to remove the gearbox for repair or replacement, then the tractor is rolled out on the planes: clutch housing - gearbox - rear axle.

Video (click to play).

To do this, a stationary jack stand is installed under the rear axle, and movable ones - under the gearbox and clutch housing, disconnect and roll out the tractor frame and remove the box.