Hummer H1 (2006+). Manual - part 330
11-54 Heating/Ventilation/Air Conditioning (HVAC)
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Figure 11-52: Auxiliary Air Conditioning Components
AUXILIARY EXPANSION VALVE REPLACEMENT
Removal
1.
Discharge the air conditioning system.
2.
Remove the center console.
3.
Remove the prestite tape and the bulb clamp.
4.
Using two wrenches for equalized support, remove the high-pressure hose from the expansion valve. Remove the O-ring from
the hose and discard the O-ring (Figure 11-53).
5.
Using two wrenches for equalized support, remove the expansion valve from the auxiliary unit. Remove and discard the O-
ring (Figure 11-46).
Installation
1.
Install the O-ring and the expansion valve on the auxiliary unit. Using two wrenches for equalized support, tighten to 15-20 lb-
ft. (20-27 N•m) (Figure 11-46).
2.
Position the O-ring onto the high pressure hose and hand-thread the hose fitting onto the expansion valve. Using two wrenches
for equalized support, tighten to 11-13 lb-ft. (15-17 N•m) (Figure 11-53).
3.
Install the prestite tape and the bulb clamp.
4.
Evacuate, charge, and leak test the system.
5.
Install the center console.
6.
Start the engine and check the operation of the auxiliary unit.
PLENUM
TUNNEL SUPPORT BRACKET
EXPANSION VALVE
BLOWER MOTOR ASSEMBLY
TOP HOUSING
EVAPORATOR/HEATER
CORE ASSEMBLY
MESH FILTER
PLASTIC PIN
LOWER HOUSING