GMC T Series 1994 Repair Manual page 113

6. REMOVE AND INSTALL PITMAN SHAFT
SEALS AND BEARING
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.
HOUSING ASSEMBLY
Inspect for burrs.
PITMAN SHAFT SEAL
NEEDLE BEARING
Remove only if it
needs replacing.
. Bearing
remover
J-6278
L______________________ I
Installer
J-8092
When tool bottoms on
housing bearing is
fully installed.
Install Pitman shaft bearing.
INSTALL
1. Install parts as shown.
Install Pitman shaft seals.
7. ADJUST WORM BEARING PRELOAD
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. ADJUST "OVER CENTER" PRELOAD
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)
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
F4653