Power Steering Pump; Pitman Shaft Seals; Removal And Installation With Steering Gear In Car - Pontiac TRANS AM 1977 Service Manual

POWER STEERING GEAR AND PUMP 3
B
3-3
RESERVOIR
\
O-RING SEAL-
THRUST
PLATE
-DIP STICK
-PUMP RING
PRESSURE
'
PLATE
RETAINING
'
RING
DISCHARGE
CAVITY
RESERVOIR-.
PRESSURE
RETAINING
RING
VANE
3
C ~ ~ S S U R E
FLOW CONTROL+~_Z~LIIIII~ UNION
V A L V E
EXIT ORIFICE
HOLE
3904
Fig. 383-2 Power Steering Pump
SERVICE PROCEDURES
PITMAN SHAFT SEALS
REMOVAL AND INSTALLATION
With Steering Gear In Car
Removal and Installation of Pitman Shaft Seals
With Steering Gear In Car
If upon inspection of the gear, it is found that oil leakage
exists at the pitman shaft seals, the seals may often be
replaced without removing the gear assembly from the car
as follows:
1. Remove pitman nut and disconnect pitman arm from
pitman shaft using Puller J-5504. (DO NOT HAMMER O N
END O F PULLER.)
2. Thoroughly clean end of pitman shaft and gear
housing, then tape splines on end of pitman shaft to insure
that seals will not be cut by splines during assembly.
NOTE: Only one layer of tape should be used; an
excessive amount of tape will not allow the seals to pass
over it, due to the close tolerance between the seals and
the pitman shaft.
3. Remove pitman shaft seal retaining ring with snap
ring pliers.
4. Start engine and turn steering wheel fully to the left
so that oil pressure in the housing can force out pitman shaft
seals. Turn off engine.
NOTE: Use suitable container to catch oil forced out of
gear. This method of removing the pitman shaft seals is
recommended, as it eliminates the possibility of scoring
the housing while attempting to pry seals out.
5. Inspect seals for damage to rubber covering on O.D.
If O.D. appears scored, inspect housing for burrs and remove
before attempting new seal installation. Check seal surface of
pitman shaft for roughness or pitting. If pitted, replacement
of pitman shaft is recommended.
6. Clean end of housing thoroughly so that dirt will not
enter housing with the installation of the new seals.
7. Lubricate the seals thoroughly with Power Steering
Fluid No. 1050017 or equivalent. To install seals with
installer (Fig. 3B3-31), install the inner single lip seal first,
then a back-up washer. Drive seal in far enough to provide
clearance for the outer seal, back-up washer and retaining
ring. Make sure that the inner seal does not bottom on the
counterbore. Install the outer double lip seal and the second
back-up washer in only far enough to provide clearance for
the retaining ring. Install retaining ring.
8. Fill pump reservoir to proper level with Power
Steering Fluid, No. 1050017 or equivalent. Start engine and
allow engine to idle for at lease three minutes without turning
steering wheel. Turn wheel to left and check for leaks. Add
Power Steering Fluid as required.
9. Remove tape and reconnect pitman arm.