Water pump d 240 DIY repair

In detail: water pump d 240 DIY repair from a real master for the site my.housecope.com.

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 ___________________

Water leakage from the drainage hole, increased noise and knocking during operation of the water pump of the D-240/243 engine of the MTZ-80, MTZ-82 tractor indicate a malfunction of the water cooling system (Fig. 1).

Rice. 1. Water pump (pomp) D-240/243 of the MTZ-80, MTZ-82 tractor, assembled

1 - pulley; 2 - bearings; 3 - case; 4 - impeller; 5 - drainage hole; 6 - roller; 7 - nut

Significant bearing play or bearing failure can damage the radiator core by the fan impeller.

Increased noise and knocking indicate extreme wear or destruction of the bearings of the water pump (pump) D-240/243 of the MTZ-80, MTZ-82 tractor, weakening of the roller seat under the drive pulley.

Coolant leakage from the drain hole or traces of oil on the drive pulley indicate the destruction of the pump shaft seals (In order to increase reliability and durability, water pumps with a seal and a reinforced bearing unit are installed on D-240/243 diesel engines).

If a malfunction occurs, remove the water pump from the D-240/243 diesel engine of the MTZ-80, MTZ-82 tractor (Fig. 2.) and disassemble it to replace worn parts (Fig. 3-7).

Video (click to play).

If the axial movement of the roller in the bearings exceeds 0.6 mm or weakening of the inner rings of the bearings on the roller is observed, then the roller is replaced as an assembly with bearings.

When the radial clearance in the bearings exceeds 0.1 mm, the bearings are replaced (Fig. 9).

Rice. 3. Mutual arrangement of parts of the D-240/243 water pump of the MTZ-80, MTZ-82 tractor

1 - pulley; 2 - bearings; 3 - impeller; 4 - case; 5 - branch pipe; 6 - pump roller; 7 - water pump drive belt; 8 - locking
plate; 9 - nut; 10 - fan

Rice. 2. Removing the water pump D-240/243 of the MTZ-80, MTZ-82 tractor

1 - pulley; 2 - water pump; 3 - branch pipe

Rice. 4. Unscrewing the nut for fastening the pulley D-240/243 of the MTZ-80, MTZ-82 tractor

1 - nut; 2 - pulley; 3 - lock plate

Rice. 5. Pressing the pump pulley

1 - pulley; 2 - two-blade puller

Rice. 6. Removing the bearing circlip

Rice. 7. Unscrewing the bolt of the pump impeller D-240/243 of the MTZ-80, MTZ-82 tractor

1 - water pump housing; 2 - impeller; 3 - bolt

Rice. 8. Pressing out the roller of the D-240/243 water pump of the MTZ-80, MTZ-82 tractor

1 - water pump housing; 2 - drift; 3 - impeller

Rice. 9. Pressing the bearing from the roller of the D-240/243 water pump of the MTZ-80, MTZ-82 tractor

1 - bearing; 2 - water pump roller; 3 - press rod

On the sealing washer of the mechanical seal, ring marks and wear marks with a depth of no more than 0.5 mm are allowed. The washer must be at least 2.5 mm thick. The cuff should not have penetrations through it.

If there are cracks, the body of the D-240/243 water pump of the MTZ-80, MTZ-82 tractor is discarded. If there are no cracks, measure the housing seating surfaces for the roller bearings and compare the results with the acceptable values.

Nominal and permissible dimensions of the D-240/243 diesel water pump of the MTZ-80, MTZ-82 tractor, mm

Distance from the end of the support sleeve to the plane of the connector: nominal - 47.0-47.3 / permissible - 48.5

Allowable housing bore diameters for bearings: Bearing 305 - 62.07 / Bearing 304 - 52.06

If there are traces of wear (annular grooves) with a depth of more than 0.5 mm on the end surface of the support sleeve of the D-240/243 pump body of the MTZ-80, MTZ-82 tractor, then the sleeve is pressed out and replaced with a new one.

When the pump is ruffled, the rubber cuffs are installed so that the cuffs with the springs are facing the ball bearings. The hub nut must be tightened with a torque of 16-19 Nm.

After assembling the pump, the roller should rotate by hand without jamming the impeller.The ends of the fan blades must be in the same plane.

What are the signs that you can conclude that there are problems with the water pump? First, there was a leak of water from the drainage hole. Secondly, an uncharacteristic noise and knocking is heard when the water pump is operating.

Another water pump failure is the formation of a significant bearing play or bearing failure. This could damage the radiator core by the fan impeller.

Loud knocks and hums are signs of extreme wear, or even destruction of the pump bearings. An imbalance of the roller seat under the drive pulley is also possible.

The emerging coolant leak from the drain hole, or oil spots on the drive pulley make it clear that the pump shaft seals have been destroyed. To increase reliability and durability, the manufacturer has installed water pumps with a VAZ-type seal and a reinforced bearing assembly since February 1987 on D-240 engines.).

Rice. 2.1.98. Water pump of the MTZ tractor assembly:
1 - pulley; 2 - bearings; 3 - case; 4 - impeller; 5 - drainage hole; 6 - roller; 7 - nut

To eliminate the malfunctions that have appeared, the water pump is removed (Fig. 2.1.99) and disassembled to replace the worn-out parts (Fig. 2.1.100-2.1.105).

With an increase in the axial movement of the roller in bearings over 0.6 mm, the roller must be replaced as an assembly with bearings. The assembly changes even in the event of a weakening of the inner bearing rings on the roller.

Bearings must be replaced if the radial clearance in them increases by more than 0.1 mm (Fig. 2.1.106).

Rice. 2.1.100. Layout of parts of the water pump of the MTZ tractor:
1 - pulley; 2 - bearings; 3 - impeller; 4 - case; 5 - branch pipe; 6 - pump roller; 7 - water pump drive belt; 8 - locking plate; 9 - nut; 10 - fan

Rice. 2.1.99. How to remove the water pump of the MTZ tractor:
1 - pulley;
2 - water pump;
3 - branch pipe

Rice. 2.1.101. How to unscrew the nut securing the pulley of the MTZ tractor water pump:
1 - nut;
2 - pulley;
3 - lock plate (since February 1987 there is no lock plate)

Rice. 2.1.102. Pressing the pulley of the water pump of the MTZ tractor:
1 - pulley;
2 - two-blade puller

Rice. 2.1.103. How to remove the retaining ring of the bearing of the MTZ tractor water pump

Rice. 2.1.104. How to unscrew the bolt of the MTZ tractor impeller:
1 - water pump housing;
2 - impeller;
3 - bolt

Rice. 2.1.105. Pressing out the roller of the water pump of the MTZ tractor:
1 - water pump housing;
2 - drift;
3 - impeller

Rice. 2.1.106. Pressing the bearing from the water pump roller of the MTZ tractor:
1 - bearing;
2 - water pump roller;
3 - press rod

The sealing washer of the mechanical seal can be operated even if it has small ring marks and signs of wear. But their depth should not exceed 0.5 mm. In general, the thickness of the washer should not be less than 2.5 mm. The cuff must be one-piece; through-breaks are unacceptable.

If you suddenly find a crack on the water pump housing, then it should be replaced. Next, diagnose the seating surfaces of the housing for the roller bearings.

Nominal and permissible dimensions of the water pump of the D-240 engine, mm

Water pump for tractors MTZ-80, MTZ-82 and their modifications are similar in structure and principle of operation to the pump 260-1307116-M, installed on the MTZ-100 and MTZ-102 tractors. The pump takes the cooled liquid from the lower radiator tank and pumps it into the engine cooling jacket, while the heated liquid is displaced from it into the upper tank.

Excessive steam generation, water or oil leakage in the system, as well as increased noises and knocking are all signs of a pump malfunction. In addition, the degree of wear of the impeller blades, casing walls and pump seals significantly affects the volume of the working fluid. Pump 240-1307010-A must be replaced or repaired if cracks are found on its body.Worn bearings and roller seals, as well as cuffs, can be replaced. If the axial movement in the bearings of the roller itself is more than 0.6 mm, the roller must also be replaced. The ball bearings of the water MTZ pump must be lubricated every 60 hours of operation, while the bearing cavity is filled with grease until it emerges from the control hole.

The mechanical seal of the impeller must be checked for its technical condition. The textolite washer of the seal may have traces of wear and annular marks with a depth not exceeding 0.5 mm, while the thickness of the washer itself should not be less than 2.5 mm. The cuff should be free of breakthroughs. During post-repair assembly of the pump, the cuffs are installed with the direction of the cuffs with springs towards the bearings. The tightening torque for the hub nut should be 16-19 Nm. When assembled, the pump shaft should turn freely by hand without jamming the impeller.

1 - pulley; 2 - pulley hub; 3 - oiler; 4 - roller; 5 - body bushing; 6 - case; 7 - impeller; 8 - oil seal holder; 9 - oil seal cuff; 10 - sealing washer; 11 - gland thrust spring; 12 - branch pipe; 13 - self-tightening frame oil seals; A - suction cavity; B - discharge cavity.

Water leakage from the drain hole, increased noise and knocking during the operation of the water pump indicate a malfunction of the water pump of the diesel cooling system (Fig. 2.1.98).

Rice. 2.1.98. Water pump assembly:
1 - pulley; 2 - bearings; 3 - case; 4 - impeller; 5 - drainage hole; 6 - roller; 7 - nut

Significant bearing play or bearing failure can damage the radiator core by the fan impeller.

Increased noise and knocking indicate extreme wear or destruction of the pump bearings, a weakening of the roller seat under the drive pulley.

Coolant leakage from the drain hole or traces of oil on the drive pulley indicate the destruction of the pump shaft seal and reinforced bearing assembly.).

When a malfunction occurs, the diesel water pump is removed (Fig. 2.1.99) and disassembled to replace worn parts (Fig. 2.1.100-2.1.105).

If the axial movement of the roller in the bearings exceeds 0.6 mm or weakening of the inner rings of the bearings on the roller is observed, then the roller is replaced as an assembly with bearings.

When the radial clearance in the bearings exceeds 0.1 mm, the bearings are replaced (Figure 2.1.106).

Rice. 2.1.100. Mutual arrangement of parts of the water pump:
1 - pulley; 2 - bearings; 3 - impeller; 4 - case; 5 - branch pipe; 6 - pump roller; 7 - water pump drive belt; 8 - locking plate; 9 - nut; 10 - fan

Rice. 2.1.99. Removing the water pump:
1 - pulley;
2 - water pump;
3 - branch pipe

Rice. 2.1.101. Unscrewing the pulley retaining nut:
1 - nut;
2 - pulley;
3 - lock plate (since February 1987, the lock plate is not installed)

Rice. 2.1.102. Pulley crimping:
1 - pulley;
2 - two-blade puller

Rice. 2.1.103. Removing the bearing retaining ring

Rice. 2.1.104. Loosen the impeller mounting bolt:
1 - water pump housing;
2 - impeller;
3 - bolt

Rice. 2.1.105. Pressing out the water pump roller:
1 - water pump housing;
2 - drift;
3 - impeller

Rice. 2.1.106. Pressing the bearing off the water pump roller:
1 - bearing;
2 - water pump roller;
3 - press rod

If there are cracks, the water pump housing is discarded. If there are no cracks, measure the housing seating surfaces for the roller bearings and compare the results with the acceptable values.

Nominal and permissible dimensions of the D-240 diesel water pump, mm

Distance from the end face of the support sleeve to the plane of the part:

Case 245-1307025-01
Bolt М10-6gx50.88.35.019 GOST 7795-70
Plug KG 3/8 ″ A12.019
Washer 10 GOST 6402-70
Gasket 50-1307048-B
Bolt М10-6gx45.88.35.019 GOST 7795-70
Gasket 50-1307049-A
Branch pipe 50-1307044-02
Washer 8 GOST 6402-70
Bolt М8-6gx45.88.35.019 GOST 7795-70
Ball bearing 160703
Ring B-62-019
Belt 1-11x10x1250 GOST 5813-76
Pulley 240-1307061-02
The hub 50-1307079
Plate 50-1307037-B1-01
Bolt М8-6gx16.88.35.019 GOST 7796-70
Nut М16х1,5.6Н.6.019 GOST 5915-70
Fan 240-1308040-01
Clip 2101-1307033
Cup 240-1307038-B
Internal frame 2101-1307036
Spring 2101-1307034
Outer frame 2101-1307037
Key 5x7.5 GOST 24071-80
Ring 01-1328
Bushing 240-1307133
Roller 245-1307052
Impeller 240-130774-B
Ball bearing 304K GOST 8338-75
Washer 50-1002073
Washer 8 GOST 6402-70
Bolt М8-6gx20.88.35.019 GOST 7796-70
Bushing 245-1307084
Ring 009-013-25-2
Ring 014-018-25-2-2

We invite regional dealers, representatives of service centers and online stores to cooperate!

The main malfunctions of the D-240 diesel

The technical condition of individual systems and mechanisms of the D-240 diesel engine of the MTZ-80 tractor is determined by external and indirect signs, as well as using diagnostic tools.

A decrease in the power of a diesel engine, excessive consumption of crankcase oil, the appearance of a large amount of gases coming out of the breather indicate wear of the cylinder-piston group, coking (sticking) of the piston rings.

Difficulty starting a diesel engine, interruptions during operation at the minimum crankshaft speed, the appearance of black smoke from the exhaust pipe indicate malfunctions of the fuel equipment, contaminated fuel filters, low pressure in the system, loose fit, burnout of valve seats and valve plates.

The degree of contamination of the filter elements for fine fuel purification and the maximum pressure developed by the fuel priming pump are checked with the KI-13943 device.

The drop in the power of the D-240 engine of the MTZ-80 tractor, a decrease in the crankshaft rotation speed are also affected by contamination of the air cleaner, leaks in the air intake duct connections, violation of the adjustment of the regulator control lever.

The degree of contamination of the air cleaner elements is determined by the signaling device, the sensor of which is installed in the intake manifold of the diesel engine.

The appearance of a red stripe in the inspection window of the warning device (or the illumination of a warning light on the cab instrument panel for tractors manufactured since 1989) during diesel operation indicates the need to clean the air cleaner.

The tightness of the intake air duct is checked at an average diesel crankshaft speed by blocking the central pipe of the air cleaner.

In this case, the diesel engine must stop quickly. Otherwise, use the indicator. KI-13948 identify leaks in the intake tract and eliminate the malfunction. The indicator pressure should not exceed 0.08 MPa.

If the speed of the crankshaft of the D-240 engine, determined by the tachospeedometer, or the speed of the power take-off shaft does not correspond to the nominal values, you should pay attention to the adjustment of the regulator thrust.

When the pedal is fully depressed or the fuel control handle is set to the "Full" position, the outer regulator lever must rest against the maximum speed limiter bolt.

Excessive consumption (waste) of crankcase oil or a large amount of gases coming out of the breather, the appearance of blue smoke from the exhaust pipe indicate the extreme wear of the cylinder-piston group.

To assess the technical condition of the cylinder-piston group, a method is used to determine the amount of gases breaking through into the diesel crankcase. This parameter is measured using a KI-4887 gas flow meter.

During the operation of MTZ-80 tractors, there are cases when not all cylinders fail. This can be caused by coking ("sticking") or breakage of the piston rings, which inevitably leads to scuffing of the working surface of the cylinder liner.

A comparative assessment of the technical condition of each cylinder is carried out by measuring the pressure at the end of the compression (compression) stroke at the starting speed of the crankshaft using the KI-861 compressor (Fig. 2.1.3).

Rice. 2.1.3. Checking the compression in the cylinders of the D-240 diesel

1 - compressor KI-861; 2 - mounting plate

The minimum pressure at the end of the compression stroke for a new engine should be 2.6-2.8 MPa; the pressure of the extremely worn one is 1.3-1.8 MPa. The most accurate reading is obtained by determining the difference in compression values for each cylinder.

If the difference between the compression of an individual cylinder and the average compression value in the remaining cylinders exceeds 0.2 MPa, then this indicates a malfunction of this cylinder.

The decrease in pressure at the end of the compression stroke in individual cylinders is affected by the violation of the tightness of the valve-seat interface. Loose fit of the valves to the seats is possible due to a violation of the clearance adjustment in the valve drive.

In the absence of a gap between the valve and the rocker arm during the working stroke of the piston, gases break through the leaks and destroy the surface of the working chamfers of the valve and its seat; as a result, the compression in the cylinder is reduced and the start of the diesel engine is more difficult.

The release of coolant from the radiator, especially with an increase in the load on the diesel engine, indicates a breakdown of the cylinder head gasket, a weakening of the tightening of the nozzle glass, and the appearance of cracks in the cylinder head.

If it is not possible to eliminate the defect by tightening the cylinder head mounting bolts or injector cup nuts, then the head is removed and inspected.

An increase in the oil level in the diesel engine crankcase indicates a violation of the tightness of the liner seals with the block as a result of cracks, cavitation destruction of the metal of the cylinder block, the ingress of water from the cooling system into it and other factors.

Low or high oil pressure (gauge) and temperature (remote thermometer) indicate low oil pump flow, wear or misalignment of the drain and bypass valves, excessive wear on the crank joints, malfunction of the thermostat valve in the cooling system, poor oil quality , contamination of the centrifugal oil cleaner.

If the oil pressure in the lubrication system according to the pressure gauge is below 0.08 MPa, the engine is stopped, the reasons for the pressure drop are found out and eliminated, the drain valve of the centrifugal oil filter is readjusted by tightening its spring, and the filter parts are washed.

If the pressure does not increase as a result, the pressure in the diesel lubrication system is measured with the KI-13936 device (Fig. 2.1.4) at the nominal crankshaft speed and, according to its readings, it is judged that the diesel engine needs to be repaired.

Rice. 2.1.4. Measurement of oil pressure in the engine smear system D-240

1 - device KI-13936; 2 - centrifugal oil filter

The appearance of extraneous noise and knocking during the operation of the motor indicates an increased or extreme wear of the mates of its parts.

Upon reaching the limiting clearances in the mating of parts, as a result of wear, dynamic loads and accompanying knocks appear, which are heard by a stethoscope in certain zones and under the appropriate operating modes of the diesel engine.

The sound of a dull middle tone in the piston movement zone, first at minimum and then at maximum speed, indicates an increased clearance between the piston and the liner.

A strong ringing sound of a metallic tone under the same test conditions indicates the ultimate
wear or melting of the connecting rod bearing.

A more dull sound of a low tone, periodically heard in the area of the main journals of the crankshaft at the rated speed with a periodic increase to the maximum, indicates wear of the main bearing shells.

The ringing sounds of a high-pitched metal tone, constantly audible at any crankshaft speed and intensifying when the diesel engine warms up, indicates increased thermal clearances in the valve train.

With an increased thermal gap, the degree of filling the cylinder with air and cleaning it from exhaust gases decreases, which affects the power of the diesel engine.

The thermal clearance in the valve train is checked with a feeler gauge with the valves fully closed at the end of the compression stroke. On a "cold" D-240 engine, the gap should be within 0.40-0.45 mm.

Dull sounds heard on the block on the right side when the diesel engine is running at low revs indicate large gaps in the camshaft bushings.

Knocking under the camshaft cover when the crankshaft speed changes abruptly indicate significant wear on the camshaft teeth.

If the parameters of the technical condition of the diesel engine have reached their limit values or exceed the permissible values in operation, then the diesel engine is disassembled for a technical examination-inspection, micrometering of the couplings of the cylinder-piston group and the crank mechanism, replacement of parts.

Dismantling the diesel engine D-240

The assembled diesel engine (Fig. 2.1.6) is removed from the tractor and replaced with a new one or repaired in case of cracks in the cylinder block, emergency knocks of main or connecting rod bearings, the limiting value of the clearance in at least one interface between the crankshaft journal and the liner.

Rice. 2.1.6. Diesel engine D-240 of the MTZ-80 tractor assembled

1 - oil pan; 2 - crankshaft; 3 - connecting rod; 4 - flywheel; 5 - a camshaft; 6 - cylinder block; 7 - cylinder head; 8 - cylinder head cover; 9 - cap; 10 - valve; 11 - valve spring; 12 - piston; 13 - barbell; 14 - fan

The type of repair - major or current - is determined when measuring the main parts of a diesel engine: piston pins, pistons, cylinder liners, connecting rod bushings. First of all, check the condition of the connecting rod bearings and crankshaft journals.

To do this, remove the oil pan, oil lines, oil pump, connecting rod caps, measure the diameter of the crankshaft connecting rod journals (Fig. 2.1.8).

The diameter of the connecting rod journals is measured in two planes - parallel and perpendicular to the longitudinal axis of the connecting rod.

If the ovality of the journals exceeds the permissible size or their diameter is less than the lower tolerance of the corresponding size group, then the crankshaft must be removed (Fig. 2.1.10) and reground to the next repair size.

Rice. 2.1.8. Measurement of the diameter of the connecting rod journals of the D-240 crankshaft

1 - micrometer; 2 - connecting rod journal of the crankshaft

Rice. 2.1.10. Removing the rear crankshaft support

1 - back support; 2 - bolts of the rear support

Nominal and repair dimensions of the connecting rod journals of the D-240 diesel engine of the MTZ-80 tractor

Size group designation / Size size, mm

H1 - 68.16-68.17
H2 - 67.91-67.92
D1 - 67.66-67.67
P1 - 67.41-67.42
D2 - 67.16-67.17
P2 - 66.91-66.92
DZ - 66.66-66.67
RZ - 66.41-66.42

In practice, in addition to overhaul dimensions (P1, P2, P3), alternating every 0.5 mm and determined by the diesel engine manufacturer, with slight wear of the crankshaft journal, they are ground to additional dimensions (D1, D2, DZ), alternating with overhaul dimensions through 0.25 mm.

In the same way, the inserts of repair sizes are bored for additional sizes (D1, D2, DZ). The ovality of the connecting rod journals of the D-240 diesel is allowed no more than 0.06 mm.

If the dimensions of the connecting rod journals are within the normal range, the disassembly of the motor is continued (Fig. 2.1.11-2.1.14), the cylinder head is removed and the pistons with connecting rods are removed.

To decide whether it is necessary to replace the connecting rod bearing shells, measure the diameter of the connecting rod bearing bore with its cap assembly with shells tightened.

Rice. 2.1.11. Removing the cylinder head cover

Rice. 2.1.12. Removing the cylinder head cover D-240 of the MTZ-80 tractor

Rice. 2.1.14. Removing the cylinder head

The difference between the measurements of the diameters of the crankshaft connecting rod journal and the connecting rod bearing bore gives the actual diametral clearance in the connecting rod bearing. The nominal clearance in the connecting rod bearings corresponds to 0.05-0.12 mm, the allowable clearance is no more than 0.3 mm.

In cases where the surface of the bushings is in a satisfactory condition, the only criterion for the need to replace them is the size of the diametrical clearance in the bearing.

When assessing the condition of the liners by inspection, it should be borne in mind that the surface of the antifriction layer is considered satisfactory if there are no scuffing, chipping of antifriction material and inclusions of foreign materials on it.

Seals of the crankshaft of the D-240 engine of the MTZ-80 tractor

To replace the cuff of the rear crankshaft seal, first remove the clutch and flywheel (Fig. 2.1.48, 2.1.49).

After removing the crankshaft seal housing from the side of the rear sheet (Fig. 2.1.50), press out the cuff with a stepped mandrel. When replacing the cuff of the front crankshaft seal, remove the front cover of the diesel engine.

Rice. 2.1.48. Unscrewing the flywheel mounting bolts D-240

Rice. 2.1.49. Pressing the flywheel

1 - back sheet; 2 - three-blade stripper; 3 - flywheel

Rice. 2.1.50. Removing the crankshaft seal housing

1 - seal housing; 2 - diesel back sheet; 3 - bolt

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Water pump MTZ and the fan are connected in one unit, which is mounted on the front wall of the motor block. The MTZ spare part has a simple structure, long service life.

However, it requires periodic maintenance.

Water pump MTZ - principle of operation, structure

An auto part includes front bushings, a pulley and its cover, a bearing and a driver, a fan crosspiece. Also, the pump device includes a filler plug, an oil seal, nuts, bushings, an impeller, and a fan roller.

The MTZ water pump works as follows. First, the fan pulley with a spider starts rotating on the front and rear bearings. These elements are lubricated through the filler hole, which in turn is closed with a plug. Water pump MTZ also has a pulley.

The part is filled with oil. After that, the roller and bronze bushings rotate. Through the leash, rotation is transmitted to the roller from the pulley. The impeller moves and water is pumped into the channel of the motor block.

The pulley starts its work after the rotation of the belts, which also contains water pump MTZ... The belt tension is adjusted using a generator.

Water pump MTZ and its repair

How do you know if a pump is faulty? In most cases, part breakdowns are signaled by the following:

Water flows from the drain hole;
Water pump MTZ makes noises;
During the work of the part, a grinding and knocking is heard.

If you notice these signs in the operation of the pump, it is necessary to repair the cooling system. Is there a gap in the bearing or are there signs of wear on the surface of the element?

Carry out unscheduled maintenance urgently. If you ignore this problem, then over time, the core of the radiator of the fan impeller will break. Consequently, you will have to spend more time and effort replacing defective parts.

The pump may be noisy. All this indicates wear of the tractor spare parts - bearings, weakening of the roller seat. Another problem is that the MTZ water pump is leaking. For example, liquid appears from the drainage hole.

Therefore, if you notice a malfunction, proceed with the repair. Take off water pump MTZ from the tractor motor.

Disassemble the part, replacing the worn out elements with new ones.

Buy a water pump only if it is severely damaged. Be sure to check the axial movement of the roller in the bearings. The value of the indicator should not exceed 0.6 mm. If you notice a weakening of the element, replace the roller complete with new bearings.

Inspect the condition of the sealing washer. Slight signs of wear are allowed on this part (depth no more than 0.5 mm). Washer thickness - not less than 2.5 mm.

Frame water pump MTZ discarded if there are cracks on the surface. After completing the inspection of the pump surface and replacing the worn parts, start the assembly of the unit.

Remember to install the rubber seals so that the spring flaps are facing the bearings.The fan, or rather the ends of its blades, must be in the same plane. Generally after assembly and repair water pump MTZ works properly.

Our company sells spare parts for various types of special equipment, trucks and agricultural equipment of domestic and foreign production, including spare parts for the D-240 MTZ engine... One of the directions of the enterprise's work is the repair and maintenance of engines, transmissions, steering, braking systems, running gear, hydraulic and electrical equipment. Working with us, you are guaranteed to receive an individual approach and expert advice, as well as high-quality spare parts and components at the lowest prices.

Repair of the engine cooling system D-240 MTZ

Cooling system of the D-240 engine (MTZ) designed to remove excess heat from heated parts and assemblies. It ensures optimum performance of the entire machine. Violation of the normal operation of the system leads to damage to the diesel engine.

The main indicator of a malfunctioning cooling system is engine overheating. One of the most common system defects is the loosening of the drive belt that rotates water pump of the D-240 engine... Loose tension, the belt slips on the pump pulley, and the pump does not rotate at full strength. In this case engine pump D-240 does not pump the optimal amount of coolant through the system at a rate sufficient for the normal operation of the diesel engine.

The tension state is checked by pressing the hand with a force of 4 kg on the middle part of the belt. Moreover, its permissible deflection should be within 15-22 mm. If this figure is exceeded, use the appropriate tools to tighten the belt to the required ratings.

If the coolant begins to seep through the interface between the pump and pipelines, this indicates a failure of the oil seals. In this case, it is necessary to make repair of the water pump of the D-240 engine... As a rule, it is sufficient to replace worn out oil seals with new ones that are included in repair kit for the water pump of the D-240 engine.

But the leakage of antifreeze can also indicate a malfunction of the valve in the filler cap of the radiator. It serves to relieve excess pressure of vapors generated during the boiling of the coolant. A non-working valve causes excessive pressure in the system, and then the liquid is squeezed out through the weak points of the system, which often become old pump seals. To avoid this, it is necessary to monitor the condition of the valve and clean it.

Since the coolant moves and heats up very much during diesel operation, over time it becomes dirty, and its chemical composition changes. As a result, the old fluid becomes unusable.

As a consequence, inside piping, pump, thermostat and radiator engine D-240 scale is formed, which destroys the entire cooling system. To avoid this, every 2000 hours of diesel operation, the system is flushed, followed by replacing the old fluid with a new one.

For washing, take 2 liters of kerosene and a soda solution (50 g of soda per 1 liter of water) and pour into radiator... The diesel must run on such a mixture for at least 10 hours. After draining the flushing mixture, the radiator must be rinsed with clean water.

In addition, the lamellar structure of the radiator and the peculiarities of the operation of the tractor lead to the fact that the heat exchanger is often clogged with dirt, grass, and other debris. To prevent such contamination from negatively affecting the performance of the cooling system, the heat exchanger should be cleaned and rinsed as often as possible.

If flushing the radiator and its internal cavity does not give the required results, it should be checked more carefully. If strong slagging, deformation, significant cracks, antifreeze leakage are found, it is recommended replacement of the radiator of the D-240 engine.

Guys help. I am still a snot in tractors, well, in the sense that I still do not understand well.In general, the problem is that the pump has begun to leak. Well, winter is coming in the yard, and it's too lazy to drain / fill the water every evening. It is necessary to actually disassemble it and prevent a leak. I don’t understand what and how it’s arranged, so I turned to you so that you could explain to me on your fingers how to disassemble it “without harm” and what needs to be done there so that it doesn’t flow .. Thank you in advance.

OH, by the way, I forgot to write that the MTZ 82.1 tractor

Guys help. I am still a snot in tractors, well, in the sense that I still do not understand well. In general, the problem is that the pump has begun to leak. Well, winter is coming in the yard, and it's too lazy to drain / fill the water every evening. It is necessary to actually disassemble it and prevent a leak. I don’t understand what and how it’s arranged, so I turned to you so that you could explain to me on your fingers how to disassemble it “without harm” and what needs to be done there so that it doesn’t flow .. Thank you in advance.

Buy a new one or disassemble and change the repair kit.

first disassemble yours, there are such pumps that the repair does not make sense. no matter how much the seal does not change, it all leaks. I saw three types of seals and none of them can be put in place of the other. a new pump can also be bought of bad quality - it ran into one, with an increase turns the propeller into the radiator climbed-a short spacer sleeve between the bearings turned out to be. and the bearings in the housing moved by hand. I made it to my mind, but after a year it flowed, I threw it out. I took it from the bull-caliber, the pulley was not on the creek, the hub protruded by a centimeter more, I had to sharpen it and adjust - again, on the pumps, the shaft under the pulley hub is different - there are 16 and 20 mm. in general, there is room for creativity.

Now good repair kits are being sold that have everything - shaft, bearings, impeller, seal, oil seal. For the price almost like a pump, but runs great. I don't remember the manufacturer, but everything is in such a beautiful box.

He also began to disassemble the pump. Now I'm looking for a rem. kit on the pump to make it normal.

I also disassembled the pump, the impeller is so-so, the water makes itself felt, but I cleaned it with a file and it seemed to take on a human form with an emery, the shaft took off the cuff on it, it also crawled into a brass bushing, the bearings also came down to nothing. I drove into the store and bought a repair kit for 710 rubles there 2 closed bearings 305, a shaft, a cuff and 2 rubber bands, one on the shaft in front of the cuff, and the second one? Tell me if I think correctly.

maybe right, or maybe not. There are several ways to seal the impeller, it's not a fact that the repair kit in the store is the same as on your pump. The usual pumps came with different bearings. and now all sorts of pumps are in the store.

Video (click to play).

But on the other hand, what can it seal?

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