GMC 1989 Light Duty Truck Repair Manual page 111

6
. R EM O VE A N D IN S T A L L PITM A N S H A FT
S E A LS A N D B EA R IN G
REMOVE
1. Clean end of housing
thoroughly to prevent
dirt from entering and
be extremely careful
not to score the
housing bore.
2. Usine screwdriver,
pry seal from bore.
H O U SIN G A S S E M B L Y
Inspect for burrs.
PITMAN SHAFT SEA L
N EE D LE BEARIN G
Remove only if it
needs replacing.
Installer
J-8092
When tool bottoms on
housing bearing is
fully installed.
Install Pitman shaft bearing.
INSTALL
1. Install parts as shown
1 ' A Socket
Install Pitman shaft seals.
Figure 8 — Model 535 — C hart C — A djustm en t
MANUAL STEERING GEAR 3B2-9
7. A D JU S T W O R M B E A R IN G PR E LO A D
1. Tighten worm bearing adjuster until it bottoms then
loosen one-quarter turn.
2. Carefully turn the wormshaft all the way to end of travel
then turn back one-half turn.
3. Tighten adjuster plug until torque wrench reads 0.6
to 1.0 N.m (5 to 8 in-lbs).
4. Tighten locknut using punch against edge of slot.
8
. A D JU S T " O VER C E N T E R " PR E LO A D
A. Back off preload
adjuster until it stops,
then turn it in one full
turn.
With gear at center
of travel, check torque
to turn stub shaft,
(reading #1)
TO RQ U E
W REN CH
11/16" socket - Due to
tolerances, some sockets
require a wrapping of
card stock around the
serrations.
B. Turn adjuster in until
torque to turn stub shaft
is 0.5 to 1.2 N*m (4 to
10 in-lbs) more than
reading #1.
Torque adjuster lock
nut to 34 N*m (25 ft-lbs).
Prevent adjuster screw
from turning while
torqueing lock nut.
F-04653