Removal and installation
If only the oil pump needs to be repaired, remove the engine from the vehicle (see chapter "Removal the engine"), install on a rotary stand, drain the oil from the crankcase, turn the engine over and remove the crankcase. Then unscrew the oil pump mounting bolts and remove it together with the intake pipe.
Perform the operations for installing the oil pump on the engine in the reverse order of removal.
Disassembly and assembly
Secure the oil pump in a vice, being careful not to damage the housing, then:
- unscrew the bolts and remove the intake pipe together with the oil pressure reducing valve;
- remove cover 3 (Fig. 2-69) of the pump housing and remove the pump shaft with the drive gear and the driven gear from the housing
- To assemble, carefully secure the pump in a vice and perform the following operations in order:
- install the drive gear with the shaft into the pump body, and place the driven gear on the axle in the body;
- install the housing cover, the pressure reducing valve with the spring and attach the inlet pipe to the pump housing.
Fig. 2-69. Disassembling the oil pump: 1 - pressure reducing valve; 2 - spring; 3 - lid; 4 - body; 5 - roller
Note: After assembling the pump, when turning the drive shaft by hand, the gears should rotate smoothly and without jamming.