Hummer H2. Manual - part 1982

Fig. 40: A/C Refrigerant Filter Components 
Courtesy of GENERAL MOTORS CORP. 

4. Install the nuts (4) to the A/C refrigerant filter (1). 

Tighten: Tighten the nuts to 15 N.m (11 lb ft). 

5. Recharge the A/C system. Refer to Refrigerant Recovery and Recharging .  

6. Leak test the fittings of the repaired or reinstalled component using the J 39400-A . See Special Tools 

and Equipment .  

7. Install the air cleaner. Refer to Air Cleaner Assembly Replacement in Engine Controls - 6.0 L.  

EXPANSION (ORIFICE) TUBE REPLACEMENT 

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Tools Required 

z

J 26549-E Orifice Tube Remover. See Special Tools and Equipment .  

z

J 39400-A Halogen Leak Detector. See Special Tools and Equipment .  

Removal Procedure 

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . 

Fig. 41: Locating Evaporator Tube 
Courtesy of GENERAL MOTORS CORP. 

2. Loosen the nut from the evaporator tube fitting.  

3. Use the J 26549-E in order to remove the orifice tube (1) from the evaporator tube (2). See Special Tools 

and Equipment .  

4. Cap or plug the open line.  

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Installation Procedure 

1. Uncap or unplug the evaporator tube.  

2. Lubricate the new O-ring using new 525 viscosity refrigerant oil. 

Fig. 42: Locating Evaporator Tube 
Courtesy of GENERAL MOTORS CORP. 

3. Install the new O-ring seal.  

4. Install the orifice tube (1) to the evaporator tube (2). 

1. Coat the O-ring seal with 525 viscosity refrigerant oil.  

2. Insert the short screen end of the new orifice (1) into the evaporator tube.  

5. Connect the evaporator tube at the fitting. 

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2

  

Tighten: Tighten the fitting to 25 N.m (18 lb ft).

6. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging .  

7. Leak test the fittings of the repaired component using J 39400-A . See Special Tools and Equipment .  

COMPRESSOR RELAY REPLACEMENT 

Removal Procedure 

Fig. 43: A/C Compressor Relay & Convenience Center 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the cover from the underhood convenience center (1).  

2. Remove the A/C compressor relay (1) from the convenience center (2).  

Installation Procedure 

 

2004 Hummer H2 

2004 HVAC Heating, Ventilation and Air Conditioning - Hummer H2