Chapter 4 – Lubrication
Service manual AJP PR3/PR4 4 - 8
Inspection
! WARNING !
If any component of the oil pump is worn
over the service limit, replace the oil pump
as a set.
Note:
Note the position of all parts during
disassembly so you can assemble the parts in
the same position.
It should be taken into consideration the
following operations:
Wash and clean all components of the oil
pump before inspecting or assemble;
Measure in several places and use the
highest value to compare with the service
limit;
If any portion of the oil pump is worn
beyond the specified service limits, replace
the entire oil pump set.
Measure the clearance between the inner and
outer rotor.
Service limit: 0,20mm
Measure the clearance between the outer
rotor and the pump housing.
Service limit: 0,35mm
Measuring the clearance between the outer
rotor and the face of the pump casing, use a
precision ruler and a blade caliper.
Service limit: 0,15mm
Removal
Remove the following components:
Rotor cover;
Inner and outer rotor;
Rotor shaft;