Hummer H1 Service Manual page 435

6-52 Wheels and Tires/Central Tire Inflation System (CTIS)
QUICK-DISCONNECT VALVE AND TUBE
REPLACEMENT
WARNING: CTIS components are subject to high air
pressure. Always relieve air pressure before loosening
or removing air system components by disconnecting
quick-disconnect valve assemblies. Failure to follow
this warning may result in serious injury.
NOTE: The replacement of all four quick-disconnect valves
and tube assemblies is identical.
Removal
1. Raise and support vehicle.
2. Remove tube shield.
3. Remove tube and nut from quick-disconnect valve
(Figure 6-76).
Figure 6-76: Quick-Disconnect Valve Assembly
CAUTION: Do not force apart quick-disconnect valve. The
quick-disconnect valve is a one-piece component. Damage to
quick-disconnect valve will result if forced apart.
4. Remove quick-disconnect valve from spindle.
5. Disconnect tube from elbow, then remove nut and sleeve
assembly and insert from tube.
6. Remove elbow.
Cleaning and Inspection
Clean and inspect tube and quick-disconnect valve. Check for
leaks, stripped threads, and cracks. Replace defective parts.
Installation
CAUTION: Do not allow sealant into air system. Sealant will
damage CTIS components.
NOTE: Apply sealant to threads prior to installation.
1. Install quick-disconnect valve into spindle (Figure 6-76).
2. Install elbow.
ELBOW
3. Install nut on tube and connect tube to quick-disconnect
valve.
INSERT
4. Install nut and sleeve assembly and insert on tube and
connect tube to elbow.
SLEEVE
5. Install tube shield.
NUT
6. Lower vehicle.
TUBE
NUT
QUICK
DISCONNECT
VALVE
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