To adjust the rear wheel bearings;

  • - raise the rear of the car;
  • —drain the oil from the wheel gears;
  • - disassemble the wheel gear;
  • - check if the wheel rotates freely from a hand push. If the wheel turns hard, find out if this is caused by damage to the oil seal or bearing. Eliminate the defect and only after that proceed with the adjustment;

Drive axle drive train with MAZ discless wheels

  • - turning the hub, tighten the nut 17 (Fig. 1, 2) to 392-490 Nm (40-50 kg/cm), then unscrew it by 60-75 degrees and check the hub for ease of rotation. It should rotate freely, but without play;
  • - install washer 18, lock washer, tighten lock nut 20 to a torque of 40-50 kgf-m and lock it with a bend of the mustache of the lock washer;
  • - check the rotation of the hub again. Axial play should not be felt.

Determine the correct adjustment by the mileage of the car by the degree of heating of the hub, the temperature of which should not exceed 60 ˚c (at a higher temperature, the hand cannot withstand prolonged contact).

MAZ hub bearing adjustment

Adjust the bearings (Fig. 2) in the following order:

  • —drain the oil from the wheel drive;
  • — remove cover 9, remove carrier 12, remove axle shaft 6, unscrew lock nut 2, remove washer 1 and loosen nut 33;

Drive axle drive with MAZ disc wheels

  • - turning the hub, tighten the nut 33 (tightening torque 392-490 Nm (40-50 kg / cm)), then unscrew it by 60-75 degrees and check the hub for ease of rotation. It should rotate freely, but without play;
  • — install lock washer 1, if the washer hole does not match the nut pin, tighten (unscrew) the nut until the pin matches the nearest washer hole;
  • - install the lock washer, tighten the lock nut to a torque of 390-490 Nm (40-50 kgf) and lock it with the bend of the tab of the lock washer;
  • - check the rotation of the hub again. Axial play should not be felt.

Determine the correct adjustment by the mileage of the car by the degree of heating of the hub, the temperature of which should not exceed 60 ° C (at a higher temperature, the hand cannot withstand prolonged contact).

The front wheel hubs are adjusted in the same way.

In this case, after removing the carrier, it is necessary to additionally remove the drive gear of the wheel drive.

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Maintenance of the K-126GU carburetor (for engines mod. 4178) The K-126GU carburetor is used to complete the 4178 model engines, as an option to replace the K-151V carburetor

Repair of the crankshaft consists of regrinding the main and connecting rod journals to the next repair size