Hummer H1 Service Manual page 767

11-48 Heating/Ventilation/Air Conditioning (HVAC)
AUXILIARY A/C DRAIN TUBE(S)
REPLACEMENT
Removal
1. Remove rear console.
2. Remove clamps from drain tube section being replaced
(Figure 11-89).
3. Remove drain tube.
DRAIN TUBE
Figure 11-89: Auxiliary A/C Drain Tube
Replacement
Installation
1. Install drain tube section and secure with clamps
(Figure 11-89).
2. Install rear console.
AUXILIARY HIGH-PRESSURE HOSE
REPLACEMENT
NOTE: Production hoses have a full underbody length of foil-
backed heat-resistant sleeving. Replacement hoses should have
the same level of thermal protection.
Removal
1. Discharge air conditioning system.
2. Remove air cleaner assembly and air induction tube
(Section 3).
3. Remove rear console.
4. Remove front console.
5. Using two wrenches to equalize support, remove auxiliary
high-pressure hose from expansion valve manifold.
Remove and discard O-ring (Figure 11-90).
6. Using two wrenches for equalized support, remove
auxiliary high pressure hose from auxiliary expansion
valve. Remove and discard O-ring (Figure 11-91).
7. Remove two P-clamps securing hose to underbody.
8. From under the vehicle pull high-pressure hose through
grommet.
DRAIN
TUBE
CLAMPS
TEE
______________________
HEATER TUBE
Figure 11-90: Auxiliary High-Pressure Hose
.
Connection, Front
AUXILIARY
EXPANSION
UNIT
MOUNTING BRACKET
Figure 11-91: Auxiliary High-Pressure Hose
Connection, Rear
Installation
1. Route expansion valve end of hose through grommet to
auxiliary unit.
2. Lubricate and position O-ring on high pressure hose and
hand thread hose fitting onto expansion valve. Using two
wrenches for equalized support, tighten to 11-13 lb-ft (15-
18 N•m) (Figure 11-91).
3. Route other end of hose to expansion valve manifold
(Figure 11-90).
4. Lubricate and position O-ring on hose and secure to high
expansion valve manifold. Using two wrenches for
equalized support, tighten to 11-13 lb-ft (15-18 N•m).
5. Install two P-clamps to secure hoses to underbody.
6. Install front and rear consoles.
7. Evacuate, charge, and leak test system.
8. Start engine and check A/C operation.
EXPANSION VALVE
MANIFOLD
HIGH PRESSURE HOSE
CONNECTION (AUX.)
7-S11-063
LOW PRESSURE
A/C HOSE
VALVE
O-RING
HIGH
PRESSURE
HOSE
®