GMC 1976 ZEO 6083 Maintenance Manual page 566

9- 3 4
STEERING
CAUTION :
Use suitable container to catch
oil forced out of gear. This method of
removing the pitman shaft seals is recom-
mended, 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 instal-
lation . Check seal surface of pitman shaft for rough-
ness or pitting . If pitted replace pitman shaft.
6 . Clean the 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 to install seals with Installer J-6219
(figure 48) . 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 re-
taining 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 . Start engine and allow engine to idle
for at least 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 .
Figure 48-Installing Pitman Shaft Seals
STUB
VALVE
SHAFT BODY
LOWER THRUST
BEARING WASHERS
Figure 49-Worm and Valve Body
NOTE : The pitman arm to steering gear nut and
washer are important attaching parts in that
they could affect the performance of vital com-
ponents and systems, and/or could result in ma-
jor repair expense . They must be replaced with
the same part numbers or with equivalent parts
if replacement becomes necessary . Do not use a
replacement part of lesser quality or substitute
design . Torque values must be used as specified
during reassembly to assure proper retention .
STEERING GEAR ASSEMBLY
1 . Lubricate the worm, lower thrust bearing and
the two thrust washers with Power Steering Fluid,
then install one thrust washer, the bearing, and the
other thrust washer over the end of the worm (figure
49) .
Figure 50-Valve
to
Worm Alignment