Procedures

Oil Pump

REMOVE

Oil Pump Cover:

1. Remove the bolts from the oil pump cover.
2. Withdraw the oil pump cover.
3. Lift off the cover and remove the gasket.
4. Withdraw the oil pump gears.

DISASSEMBLE

Oil Pressure Relief Valve:

5. Unscrew the plug from the pressure relief valve.
6. Lift the sealing washer from the plug.
7. Withdraw the spring from the relief valve.
8. Withdraw the pressure relief valve.

INSPECT

9. Check the oil pump gears for wear or scores.
10. Fit the oil pump gears and shaft into the front cover.

Oil Pump Cover Clearance:

11. Place a straight edge across the gears.
12. Check the clearance between the straight edge and the front cover. If less than 0.05 mm (0.002 in), check the front cover gear recess for wear.
13. Check the oil pressure relief valve for wear or scores.
14. Check the sides of the relief valve spring for wear or signs of collapse.
15. Clean the wire screen filter for the relief valve.
16. Check the fit of the relief valve in its bore. The valve must be an easy slide fit with no perceptible side movement.


ASSEMBLE

17. Insert the relief valve spring.
18. Locate the sealing washer on to the relief valve plug.
19. Fit the relief valve plug and tighten to 40-47 Nm (30-35 ft lb).
20. Fully pack the oil pump gear housing with Petroleum Jelly. Use only Petroleum Jelly; no other grease is suitable.
21. Fit the oil pump gears so that the Petroleum jelly is forced into every cavity between the teeth of the gears.


Important: Unless the pump is fully packed with Petroleum jelly it may not prime itself when the engine is started.

22. Place a new gasket on the oil pump cover.
23. Locate the oil pump cover in position.
24. Fit the special bolts and gradually tighten to 11-14 Nm (8-10 ft lb).