Buick LeSabre 1965 Service Manual page 490

8 - 2 6 POWER STEERING STEERING GEAR, STEERING COLUMNS AND LINKAGE
8 - 1 2 REMOVAL AND
INSTALLATION OF
PITMAN SHAFT
SEALS, STEERING
GEAR AND OIL
PUMP
a. 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 re-
moving gear assembly from car
as follows:
1. Remove pitman nut and dis-
connect pitman arm from pitman
shaft.
2. Thoroughly clean end of pit-
man shaft and gear housing, then
tape splines on end of pitman
shaft to insure that seals will not
be cut by splines during disas-
sembly and assembly.
NOTE: Only one layer of tape
should be used; an excessive a-
mount 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 re-
taining ring with No. 3 Truarc
pliers J-4245.
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 at-
tempting 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 at-
tempting new seal installation.
6. Clean the end of housing thor-
oughly so that dirt will not enter
housing with the installation of the
new seals.
7. Lubricate the seals thoroughly
with petroleum jelly and install
seals with Installer J-6219. In-
stall the inner single lip seal
first, then a back-up washer. See
Figure 8-50. Drive seal in far
enough to provide clearance for
the other seal, back-up washer
and retaining ring. Make sure
that the inner seal does not bot-
tom on the counter bore. Install
the outer double lip seal and the
second back-up washer in only
far enough to provide clearance
for the retaining ring. Install re-
taining ring.
8. Fill pump reservoir to proper
level. Start engine and allow en-
gine to idle for at least three
minutes without turning steering
wheel. Turn wheel to left and
check for leaks.
9. Remove tape and reinstall pit-
man arm.
b. Removal of Power Steering
Gear
1. Place fender cover over left
front fender.
2. Disconnect the pressure and
return line hoses at the steering
gear and elevate ends of hoses
higher than pump to prevent oil
from draining out of pump.
3. Remove pinch bolt from cou-
pling lower flange. See Figure
8-26 or 8-27.
4. Jack up car and remove the
pitman shaft nut, then remove the
pitman arm using Puller J-5504.
See Figure 8-28.
5. Loosen the three-frame-to-
steering gear bolts at outside of
frame and remove steering gear.
c. Installation of Steering
Gear Assembly
1. Install the gear assembly by
reversing the procedure for re-
moval. See Figure 8-26 or 8-27
for t i g h t e n i n g specifications.
Torque pitman nut to 135 ft. lbs.
Torque lower coupling pinch bolt
to 30 ft. lbs. Be sure there is
1/16" clearance between adjuster
plug and coupling.
2. Fill pump reservoir to correct
level with automatic transmission
oil.
3. Start engine and maintain oil
level in reservoir while allowing
engine to idle for at least three
minutes before turning steering
wheel. Then rotate steering wheel
through its entire range slowly a
few times with engine running.
Recheck oil level and inspect for
possible leaks.
NOTE: If air becomes trapped in
the oil, the oil pump may be noisy
until all air is out of oil. This
may take some time since air
trapped in oil does not bleed out
rapidly.
d. Removal of Oil Pump
Refer to Figures 8-29 & 8-30.
It is not necessary to remove oil
pump to service the flow control
valve or to replace the shaft seal.
The flow control valve is retained
in pump housing by the pressure
Figure 8-28—Removing Pitman Arm
from Pitman Shaft