Hummer H1 (2006+). Manual — part 228
6-62
Wheels and Tires/Central Tire Inflation System (CTIS)
_______________
Figure 6-69: Right Rear Line Routing Over Rear Crossmember
AIR INTAKE LINE REPLACEMENT
Removal
1.
Raise and secure the hood.
2.
Loosen the hose clamp and disconnect the air intake hose from the connector (Figure 6-70).
Figure 6-70: Air Intake Hose
3.
Loosen the clamp and disconnect the air cleaner elbow from the air horn.
4.
Remove the nut, washer, coupling, connector, and seal from the air horn.
5.
Loosen the hose clamp securing the air intake hose to the compressor fitting (Figure 6-71).
6.
Remove the air intake hose.
Cleaning and Inspection
Clean and inspect the air intake hose, elbow, coupling assembly and seal. Check for leaks, cracks, and stripped threads.
CAUTION: Do not allow sealant into the air system. Sealant will damage the CTIS components.
Installation
1.
Connect the air intake hose to the compressor fitting and secure with the hose clamp (Figure 6-71).
2.
Install the seal, coupling, washer, nut, and connector to the air horn(Figure 6-70).
AIR LINE TO
REAR
RIGHT REAR WHEEL
AIR LINE
TO TEE
CROSSMEMBER
CLAMP
CLAMP
CONNECTOR
AIR
INTAKE
HOSE
______________
Wheels and Tires/Central Tire Inflation System (CTIS) 6-63
5745804
3.
Connect the air cleaner elbow to the air horn and secure with the clamp.
4.
Connect the air intake hose to the air horn connector and secure with the hose clamp.
5.
Lower and secure the hood.
Figure 6-71: Air Intake Hose to Fitting
QUICK-DISCONNECT VALVE AND TUBE REPLACEMENT
WARNING: The CTIS components are subject to high air pressure. Always relieve the air pressure before loosen-
ing 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 the vehicle.
2.
Isolate the quick-disconnect valve of the wheel being serviced and the match on the other side of the vehicle (Figure 6-74).
3.
Disconnect the compression nut and separate the tube from the quick-disconnect valve.
CAUTION: Do not force apart the quick-disconnect valve. The quick-disconnect valve is a one-piece component. Damage to the
quick-disconnect valve will result if forced apart.
4.
Remove the quick-disconnect valve from the spindle.
5.
Disconnect the compression nut from the threaded connector, then remove the nut and sleeve assembly.
6.
Remove the threaded connector.
Cleaning and Inspection
Clean and inspect the tube and the quick-disconnect valve. Check for leaks, stripped threads, and cracks. Replace the defective
parts.
Installation
CAUTION: Do not allow sealant into the air system. Sealant will damage the CTIS components.
CLAMP
FITTING
AIR INTAKE
HOSE
12-1-05
6-64
Wheels and Tires/Central Tire Inflation System (CTIS)
_______________
NOTE: Apply sealant to the threads prior to installation.
1.
Install the quick-disconnect valve into the spindle (Figure 6-74).
2.
Install the threaded connector.
3.
Install the compression nut on the tube and connect the tube to the quick-disconnect valve.
4.
Install the compression nut on tube and connect the tube to the threaded connector.
5.
Reactivate the quick-disconnect fittings on both wheels.
6.
Adjust the air pressure in the tires as needed.
7.
Lower the vehicle.
Figure 6-72: Quick-Disconnect Valve and Tube Replacement
TUBE CONNECTION SHIELD REPLACEMENT
NOTE: This procedure applies to all of the tube connection shields.
Removal
Remove the two bolts, washers, shield and two washers from the steering arm cover (Figure 6-73).
Cleaning and Inspection
Clean and inspect the shield and mounting hardware. Check for cracks and stripped threads. Replace the defective parts.
02-S06-001
QUICK-
DISCONNECT
VALVE
TUBE
COMPRESSION
NUTS
THREADED
CONNECTOR
12-1-05
______________
Wheels and Tires/Central Tire Inflation System (CTIS) 6-65
5745804
Figure 6-73: Rear Tube Connection Shield
Installation
Install the shield on the steering arm cover with two washers, bolts and two washers. Tighten the bolts to 75 lb-ft (102 N•m) (Fig-
ure 6-73).
Figure 6-74: Line Connection at the Steering Arm Cover
SPINDLE EXTENSION AND SEAL REPLACEMENT
Removal
1.
Remove the braided CTIS hose from the 45° line fitting and remove the line fitting from the steering arm cover (Figure 6-74).
2.
Remove the tie rod end from the steering arm cover (Refer to section 9).
3.
Remove the tube connection shield (Refer to section 6).
4.
Remove the remaining two bolts, washers and the steering arm cover from the geared hub (Figure 6-75).
5.
Remove the retaining ring and seal from the steering arm cover.
STEERING
ARM COVER
SHIELD
01-S06-007
STEERING
ARM COVER
BRAIDED
HOSE
45° LINE
FITTING
12-1-05
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