The coolant pump is being repaired due to coolant leakage from the inspection hole

Repair sequence

Coolant pump: 1 - pump cuff; 4 - pump housing; 5 - pump roller; 6 - impeller; 7 - thrust ring; 8 - sealing ring; 9 - ring cage; 11 - dust deflector; 13 - pulley; 14, 15 - bearing; 17 - oiler; 18 - pulley mounting bolt; 19 - spring washer; 20 - washer; 22 - nut; 25 - retaining ring; 27 - washer; 28 - segment key; 31 - water pump cuff

Drain the coolant

Coolant drain valve

Loosen the tension on the pump drive belt and remove the belt

Loosen the coolant supply clamp

You can unscrew the pump pipe

KAMAZ pump repair

Remove the three pump mounting bolts

Remove the pump, while removing the supply pipes to the thermostat housing and fluid coupling

Unscrew the bolt securing the pump pulley 18

Unscrew the cap nut securing the impeller 22

Using a soft metal drift and a hammer, knock out the shaft along with the bearings and cuffs

Assemble in the sequence shown in the figure

After assembly, press Litol 24 through a grease gun. We replace the O-rings and gasket.

When installing the pipes, lubricate the O-rings with Litol.

Spare parts are supplied as an assembled roller with bearings and cuffs, or separately.

To replace the oil seal, the water pump is disassembled in the following sequence: the lock washer is bent and the cap nut is unscrewed, while keeping the shaft from turning.

Replacing the roller seal in the water pump housing: 1 - support plate; 2 - water pump housing; 3 - water pump seal; 4 - water pump roller; 5 - device for pressing the seal
Pressing the impeller onto the water pump roller: 1 - support plate; 2 - water pump housing; 3 - impeller; 4 - water pump roller; 5 - device for pressing the impeller onto the roller

After this, the impeller with the seal, the sealing ring and the thrust ring are removed in sequence: using a puller I-81.33.000; Using the I-81.40.000 puller, the pulley is removed, the key is knocked out, the dust deflector and retaining ring are removed, and the roller assembly with ball bearings is pressed out.

The seal is then removed from the pump housing. The defective seal is replaced with a new one.

Assembly of the water pump is carried out as follows.

The roller assembly with bearings is installed in the housing.

After this, the seal is pressed onto the pump shaft with a mandrel, as shown in the figure, and the impeller is pressed with another mandrel, as shown in the figure.

A retaining ring, a dust deflector, a key are installed on the second end of the roller, and a pulley is pressed on.

After assembly, the cavity of the ball bearings is filled with Litol-24 lubricant.

During operation, the lubricant is replenished at each maintenance-2.