Pic. 2.28. To properly assemble the oil pump, put alignment marks on the pump rotors or gears
Examination
Gear pump
2. Check the gap between the teeth of the internal gear and the segment (pic. 2.29). Normal value: 0.21-0.34mm. Limit value: 0.5 mm.
Pic. 2.29. Checking the gap between the teeth of the internal gear and the segment
3. Check the clearance between the teeth of the outer gear and the segment (pic. 2.30).
Normal value: 0.22-0.44mm. Limit value: 0.6 mm.
Pic. 2.30. Checking the clearance between the teeth of the outer gear and the segment
4. Check pump end play (pic. 2.31). Normal value: 0.04-0.10mm. Limit value: 0.15 mm.
Pic. 2.31. Checking the axial clearance of the gear oil pump
5. Check clearance between outer gear and oil pump housing (pic. 2.32). Normal value: 0.1-0.20mm. Limit value: 0.3 mm.
Pic. 2.32. Checking clearance between outer gear and oil pump housing
Rotary pump
6. Check radial clearance (pic. 2.33). Normal value: 0.06-0.18mm. Limit value: 0.35 mm.
Pic. 2.33. Checking the Radial Clearance of the Rotary Oil Pump
7. Check end play (pic. 2.34). Normal value: 0.04-0.10mm. Limit value: 0.2 mm.
Pic. 2.34. Checking the axial clearance of a rotary oil pump
8. Check clearance between outer rotor and pump housing (pic. 2.35). Normal value: 0.10-0.18mm. Limit value: 0.35 mm.
Pic. 2.35. Checking clearance between outer rotor and pump casing