TRANSMISSION OIL PUMP MAINTENANCE (Cont).
If removing bushings, their location should be measured to ensure
Installation in same location.
Inspect pump body bushing, and front and rear stator shaft bushings for damage. Remove and
replace if damaged. Inspect stator shaft for damaged splines. Replace oil pump assembly if
splines are damaged.
Inspect regulator boost valve assembly and pressure regulator valve for free operation and
damage. Ensure that there is no dirt in pressure regulator bore. Replace components if there
is binding or damage.
Inspect cover assembly face for
overall flatness. Inspect to see that all
oil passages are open and not
Inspect to see that breather hole (28)
is open and has a 1/8 in. diameter.
Use compressed air to open all oil
passages and breather hole, Replace
oil pump assembly if cover assembly
face is not flat, if there is evidence of
porosity, or if breather hole is not
open to specification.
Inspect 2 oil seal ring grooves for
damage. Replace oil pump assembly
if damaged. Inspect selective washer
and replace if damaged.
All components should be lightly
coated with hydraulic fluid as they
Install driven gear (27) and drive gear
alinement marks facing
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