Oil Pump: Testing and Inspection

HOUSING-TO-ROTOR AXIAL CLEARANCE






- Check the housing-to-rotor axial clearance on the pump rotor. If the housing-to-rotor axial clearance exceeds the service limit, replace the set of inner and outer rotors and/or the pump housing.
- Housing-to-Rotor Axial Clearance
- Standard (New): 0.02-0.07 mm (0.001-0.003 inch)
- Service Limit: 0.12 mm (0.005 inch)

HOUSING-TO-OUTER ROTOR RADIAL CLEARANCE






- Check the housing-to-outer rotor radial clearance. If the housing-to-outer rotor radial clearance exceeds the service limit, replace the set of inner and outer rotors and/or the pump housing.
- Housing-to-Outer Rotor Radial Clearance
- Standard (New): 0.10-0.19 mm (0.004-0.007 inch)
- Service Limit: 0.21 mm (0.008 inch)

INNER-TO-OUTER ROTOR RADIAL CLEARANCE






- Check the inner-to-outer rotor radial clearance on the pump rotor. If the inner-to-outer rotor clearance exceeds the service limit, replace the inner and outer rotors.
- Inner Rotor-to-Outer Rotor Radial Clearance
- Standard (New): 0.02-0.16 mm (0.001-0.006 inch)
- Service Limit: 0.20 mm (0.008 inch)