Oil Pump

OIL PUMP

DISASSEMBLY
1. Remove the reaction shaft support bolts.





2. Remove the reaction shaft support (2) from the pump housing (1) (Fig. 237).





3. Remove the pump gears (2, 3) (Fig. 238) and check for wear and damage on pump housing (1) and gears (2, 3).
4. Re-install the gears and check clearances.





5. Measure the clearance between the outer gear (1) and the pump pocket (2) (Fig. 239). Clearance should be 0.089 - 0.202 mm (0.0035 - 0.0079 inch).
6. Measure clearance between outer gear and crescent. Clearance should be 0.060 - 0.298 mm (0.0023 - 0.0117 inch).
7. Measure clearance between inner gear and crescent. Clearance should be 0.093 - 0.385 mm (0.0036 - 0.0151 inch).
8. Position an appropriate piece of Plastigage across both pump gears.
9. Align the Plastigage to a flat area on the reaction shaft support housing.
10. Install the reaction shaft to the pump housing. Tighten the bolts to 27 Nm (20 ft. lbs.).
11. Remove bolts and carefully separate the housings. Measure the Plastigage following the instructions supplied.
12. Clearance between outer gear side and the reaction shaft support should be 0.020 - 0.046 mm (0.0008 - 0.0018 inch). Clearance between inner gear side and the reaction shaft support should be 0.020 - 0.046 mm (0.0008 - 0.0018 inch).

ASSEMBLY





1. Assemble oil pump as shown (Fig. 240)
2. Install and torque reaction shaft support-to-oil pump housing bolts to 28 Nm (20 ft. lbs.) torque.