Removal and installation
If only the oil pump needs to be repaired, remove the engine from the vehicle (see chapter «Removing the engine»), place on a turntable, drain the crankcase, turn the engine over and remove the crankcase. Then turn away bolts of fastening of the oil pump and remove it together with a receiving branch pipe.
Install 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, and then:
- unscrew the bolts and remove the intake pipe together with the oil pressure reducing valve;
- remove cover 3 (pic. 2-69) pump housing and remove the pump shaft with the drive gear and the driven gear from the housing
- To assemble, secure the pump carefully in a vise and proceed in the following order:
- install the drive gear with the shaft into the pump housing, and put the driven gear on the axle in the housing;
- install the casing cover, pressure reducing valve with spring and attach the suction pipe to the pump casing.
Pic. 2-69. Oil pump disassembly: 1 - pressure reducing valve; 2 - spring; 3 - cover; 4 - body; 5 - roller
Note. After assembling the pump, when turning the drive shaft by hand, the gears should rotate smoothly and without jamming.