Disassembly and Assembly

Fig. 8 Exploded View Of Oil Pump:

OVERHAUL

1. Remove oil strainer subassembly and oil pump cover, Fig. 8.
2. Remove rotors, relief valve plug, spring and valve.
3. Remove snap ring, spacer, driveshaft gear, key and shaft subassembly.
4. Reverse procedure to assemble.

Fig. 9 Checking Clearance Between Driven Gear & Body:

Fig. 10 Checking Gear Backlash:

INSPECTION

1. Check relief valve for scoring or wear. If damaged, replace valve or pump assembly.
2. Measure clearance between driven gear and body, Fig. 9. If clearance is greater than .008 inch, replace gear and/or body.
3. Measure backlash between driven and drive gears, Fig. 10. If backlash is greater than .035 inch, replace shaft assembly and drive gear.
4. Place a straightedge between rotors and housing, then measure side clearance between rotors and straightedge. If clearance is greater than .0006 inch, replace gears and/or pump unit.