GMC 1990 Light Truck Repair Manual page 109

REMOVE
1. Wrap 0.1 mm to 0.2 mm
(.005" to 008") shim stock
around shaft and insert
between shaft and seal.
Pry seal out.
W O R M S H A F T
SHIM S T O C K
W O R M S H A F T
S E A L
REMOVE
1. Center steering gear.
2. Rem ove parts as shown.
SID E C O V E R B O LT S
P R E L O A D
A D JU S T E R
SHIM
P R E L O A D
A D JU S T E R
PITM AN
S H A F T
1. REMOVE AND INSTALL WORM SHAFT
SEAL GEAR ASSEMBLED
INSTALL
1. Install parts as shown.
S C R E W D R IV E R
H O U SIN G
NOTICE: Do not turn steering wheel hard
against "stops" when linkage is disconnected.
2. REMOVE AND INSTALL PITMAN SHAFT
AND SIDE COVER
INSTALL
1. Before installing turn
preload adjuster screw
counterclockwise until
it bottoms, then back
screw off one half turn.
2. Install parts a s shown.
P R E L O A D A D JU S T E R N U T
(If replacing gasket only, do not remove.
PITM AN
S H A F T S E A L
Figure 6— Model 535 — Chart A
MANUAL STEERING 3B2-7
1" S O C K E T
W O R M S H A F T
Install seal.
Checking end clearance
If clearance is greater than .05 mm (.002") a steering gear
lash adjuster kit is available
P R E L O A D
A D JU S T E R
F E E L E R G A U G E
(Select to get
proper clearance)
LUBRICATION
The steering gear requires .315 kg (11 oz)
of lubricant GM 4673M or equivalent.
S E A L
H O U SIN G
SHIM
PITM AN S H A F T
F4651