Overhauling Oil Pump

OVERHAULING OIL PUMP

- Oil Pump Removed -






Unscrew connector (1).
Remove spring (2) and piston (3).

Important:
Never change relaxed spring length.

Remove oil pump cover (4).
Take off connecting plate (5).
Connecting plate (5) can be service installed.






Check play between outer rotor and pump body.
If play exceeds specifications. replace pump body.






Check gap between inner and outer rotors. If gap exceeds specifications. replace inner and outer rotors.






Check play between rotor sealing surface and pump body.
If play exceeds specifications, replace pump body.






Pull off (don't press off) output flange with Special Tool 00 8 500 from Kukko.






Installation:
Note flange distance to inner rotor: A= 44.3 ±0.1 mm (1.744 ± 0.004").






Important:
Clean vent bore thoroughly.
If oil pump does not have an oil bore this bore can be drilled subsequently






Venting of pressure chamber (D) at the beginning of delivery is accomplished by way of bore (E) and is regulated by the pressure relief piston. This will reduce the time for which the oil pressure indicator lamp is on considerably.