4.2.3 General instructions on water pump disassembly and assembly
4.2.3.1 Water pump disassembly
Unscrew bolts 2 (Fig. 16) of the fan mounting.
Mount a fixer on pulley 9 (Fig.28) end surface, similar to that shown on Fig.29, with the
mounting holes coordinates corresponding to the holes coordinates on the pump pulley.
Holding the pulley by the fixer lever, unscrew nut 11(Fig. 28). Remove pulley 9 using a
puller. Take the key out of the slit on the pump shaft and stop ring 12 fixing the bearings
block in the water pump housing.
Unscrew three 3 bolts of the water pump cover. Remove the water pump cover using two
dismantling pieces 13 (thread
М8) located on the cover end. Remove plug 6 installed in
the impeller end.
Press the shaft with bearings out of the water pump housing. The pressing out direction –
to pulley mounting side. Press the bearings out of the shaft.
Press the gland out of the pump housing.
Check the parts for defects.
4.2.3.2 Water pump assembly.
Mount thrust ring 14 on the pump shaft, press the bearings in. Fill the bearings and bear-
ings cavities with 45g of Litol 24-
МЛи 4/12-3 lubricant. Press the shaft with bearings into
the pump housing. Mount ring 12 stopping the bearings unit.
Mount the pump pulley, washer and nut. Tighten the nut with 120…140N·m torque.
Using the mandrel (Fig. 30) press water pump sealing 2 with the inner housing on the wa-
ter pump shaft and simultaneously press with the sealing outer housing into the water
pump housing till the sealing housing flange thrust to the water pump gasket surface. The
mandrel design must ensure the inner sealing housing pressing so that the inner housing
end surface stays at 10,7±0,1 mm away from the sealing outer housing.
Press the impeller on the shaft till the pump shaft end coincides with the impeller bore end
surface ensuring 15,5±0,1mm from the pump housing end to the impeller end surface.
Mount a plug in the impeller end. Mount the water pump cover providing horizontal posi-
tioning of the dismantling bosses located on the cover. Fix the cover with three bolts put-
ting on them spring and flat washers. The bolts must be tightened with 4,5…10 N·m
torque. Mount the water pump on the engine.