Hummer H1 Service Manual page 437

6-54 Wheels and Tires/Central Tire Inflation System (CTIS)
SPINDLE EXTENSION AND SEAL
REPLACEMENT
Removal
1. Remove rear tube connection shield.
2. Remove four bolts, washers, and steering arm cover from
geared hub (Figure 6-79).
3. Remove retaining ring and seal from steering arm cover.
4. Remove spindle extension from spindle.
STEERING
ARM COVER
SEAL EXTENSION
RETAINING
RING
Figure 6-79: Spindle Extension and Seal
Cleaning and Inspection
Clean and inspect spindle extension and seal. Check for leaks
and cracks. Replace defective parts.
Installation
CAUTION: Do not allow sealant or adhesive into air system.
Sealant will damage CTIS components.
1. Apply sealant to seal and install seal in steering arm cover
(Figure 6-79).
2. Secure seal to steering arm cover with retaining ring.
3. Apply a small amount of adhesive to end of spindle
extension and install into spindle.
4. Install steering arm cover on geared hub with four washers
and bolts. Tighten bolts to 75 lb-ft (102 N•m).
5. Install rear tube connection shield.
AUXILIARY AIR HOSE REPLACEMENT
Removal
1. Raise and secure hood.
WARNING: The CTIS air system contains air under
high pressure. Always relieve air pressure before loos-
ening or removing air system component(s) by discon-
necting quick-disconnect valves. Failure to follow this
warning may result in personal injury.
2. Isolate tire by depressing metal tab on quick-disconnect
valve body. The valve body will pop out approximately
1/4 in. (6 mm) from shuttle. Perform this procedure on
GEARED
HUB
remaining three wheels (Figure 6-81).
SHUTTLE
Figure 6-80: CTIS Quick-Disconnect Valve
3. Remove auxiliary air valve from tee (Figure 6-81).
_______________
TAB
VALVE
BODY
DISCONNECTED
CONNECTED
®