Oil Pump

OIL PUMP





INSPECTION



1. Inspect oil pump body, oil pump shaft and ring groove areas for wear.




2. Remove oil pump plate.
3. Inspect gears and all internal surfaces for faults and visible wear.
4. Measure clearance between outer gear and crescent.

Standard clearance: 0.20 - 0.30 mm (0.0079 - 0.0118 in.)

Replace oil pump inner & outer gear and oil pump housing if the clearance exceeds 0.35 mm (0.0138 in.).




5. Measure clearance between outer gear and pump housing.

Standard clearance: 0.20 - 0.30 mm (0.0079 - 0.0118 in.)

Replace oil pump inner & outer gear and oil pump housing if the clearance exceeds 0.35 mm (0.0138 in.).




6. Measure clearance between gears and oil pump housing.

Standard clearance: 0.02 - 0.04 mm (0.0008 - 0.0016 in.)

Replace oil pump inner and outer gears and oil pump housing if the clearance exceeds 0.04 mm (0.0016 in.).

Oil Pump Outer Gears:

Oil Pump Inner Gears:

- Select oil pump inner and outer gears of the proper thickness from among those in the table before installation.




7. Check oil pump plate for scratches or bending.




8. Measure clearance between seal ring and ring groove.

Standard clearance: 0.10 - 0.25 mm (0.0039 - 0.0098 in.)
Wear limit: 0.25 mm (0.0098 in.)

ASSEMBLY



1. Install oil pump gear hub, pressure relief spring and steel ball onto oil pump housing.




2. Install oil pump plate.
Do not allow periphery of oil pump plate to protrude beyond periphery of oil pump housing.




3. Install seal rings.
Refer to the figure for proper locations of the two different types of seal rings.