Condenser Replacement - Hummer H1 Service Manual

11-20 Heating/Ventilation/Air Conditioning (HVAC)
Receiver/Dryer-To-Evaporator Core Hose
WARNING: Air conditioning system components are
subject to high pressure R-134a gas. Always discharge
pressure and contain refrigerant using approved service
equipment. Use extreme care when handling R-134a.
Direct contact with skin may cause frostbite. Do not
smoke in areas where R-134a is stored or used. Failure
to follow these warnings may result in serious injury.
Removal
1. Discharge air conditioning system.
2. Disconnect hose from receiver/dryer and remove O-ring.
Discard O-ring (Figure 11-13).
3. Disconnect auxiliary hose connection (if equipped).
4. Remove hose and O-ring from expansion valve manifold
block. Discard O-ring (Figure 11-11)
Installation
1. Lubricate two O-rings with PAG oil and position on hose
(Figure 11-11).
2. Secure hose to expansion valve manifold block. Using two
wrenches for equalized support, tighten to 11-13 lb-ft (15-
18 N•m).
3. Torque auxiliary unit line to 11-13 lb-ft (15-18 N•m).
4. Secure hose to receiver/dryer. Using two wrenches for
equalized support, tighten to 11-13 lb-ft (15-18 N•m)
(Figure 11-13).
5. Leak test system.
______________________

CONDENSER REPLACEMENT

Removal
WARNING: Air conditioning system components are
subject to high pressure R-134a gas. Always discharge
pressure and contain refrigerant using approved service
equipment. Use extreme care when handling R-134a.
Direct contact with skin may cause frostbite. Do not
smoke in areas where R-134a is stored or used. Failure
to follow these warnings may result in serious injury.
1. Discharge air conditioning system.
NOTE: Cover all open lines to prevent contamination.
2. Disconnect two pressure hoses from condenser and
remove O-rings. Discard O-rings.
CONDENSER
Figure 11-14: Condenser Replacement
3. Remove screws, washers, spacers, and condenser from oil
cooler (Figure 11-14).
Installation
1. Secure condenser to oil cooler with spacers, washers, and
screws (Figure 11-14).
2. Lubricate two O-rings with PAG oil and install on
pressure lines.
3. Connect two pressure hoses to condenser.
4. Evacuate and charge air conditioning system.
®
OIL
COOLER