Oil Pump Inspection (3.0L) - Mazda B-Series 1997 Workshop Manual

OIL PUMP
INSPECTION
Oil Pump
1. Check the inside of the pump housing and the inner and
outer gears for damage or excessive wear.
2.
Check the mating surface of the pump cover for wear.
Minor scuff marks are normal, but if the cover, gears, or
housing surfaces are excessively worn, scored, orgrooved,
replace the pump. Inspect the rotor for nicks, burrs or
score marks. Remove minor imperfections with an oil
stone.
Note
With the rotor assembly removed from the pump
and resting on a flat surface, the inner and outer
rotor tip clearance must not exceed the limit with a
feeler gauge inserted a distance of 13 mm (0.5 in).
Clearance: 0.30 mm (0.012 in)
Relief spring tension:
28.2 mm (1.1 1 in)
/
21-22 kgf (9.1-10.1 Ibf)
c
MDlO31-A
Note
Internal components are not serviced. If any com-
ponent is out of specification, the pump assembly
must be replaced.
5BUOD2-011
IGHTEDGE
3. With the rotor assembly installed in the housing, place a
straightedge over the rotor assembly and the housing.
4. Measure the vertical clearance (rotor end play between
the straightedge and both the inner rotor and the outer
race). Maximum clearance must not exceed the limit.
Limit: 0.13 mm (0.005 in)
5. Inspect the relief valve spring to see if it is collapsed or
worn. Check the relief spring tension. If the tension is not
within specification and/or the spring is worn ordamaged,
MDI 032-8
~BUODI-012
replace the pump. Check the relief valve piston for free
operation in the bore.