Hummer H2. Manual - part 2118

Fig. 19: Removing Control Valve Assembly & Flow Control Spring From Pump Housing Assembly
Courtesy of GENERAL MOTORS CORP. 

5. If replacement is required, remove the control valve assembly (2) and the flow control spring (3) from the 

pump housing assembly (1). 

 

2004 Hummer H2 

2004 STEERING Power Steering System - Hummer H2

  

Fig. 20: Reservoir Assembly & Pump Housing Assembly 
Courtesy of GENERAL MOTORS CORP. 

6. Remove the reservoir assembly (1) from the pump housing assembly (2). 

 

2004 Hummer H2 

2004 STEERING Power Steering System - Hummer H2

  

Fig. 21: Reservoir O-ring Seals 
Courtesy of GENERAL MOTORS CORP. 

7. Remove the O-ring seals (1) (4) (5).  

8. Remove the magnet (3).  

9. Clean the magnet (3).  

10. Inspect the welch plug in the power steering pump housing (2). Do not remove. If the welch plug is 

deformed or dislodged, replace the power steering pump housing (2).  

Assembly Procedure 

 

2004 Hummer H2 

2004 STEERING Power Steering System - Hummer H2

  

Fig. 22: Pump Housing Assembly Components 
Courtesy of GENERAL MOTORS CORP. 

1. Lubricate the O-ring seals (1) (4) (5) with power steering fluid.  

2. Install the flow control spring (7) to the pump housing assembly (2).  

3. Install the control valve assembly (6) to the flow control spring (7).  

4. Install the O-ring seals (1) (4) (5) to the pump housing assembly.  

5. Install the magnet (3) to the pump housing assembly (2). 

IMPORTANT: Use new O-ring seals when assembling the power steering pump 

assembly.

 

2004 Hummer H2 

2004 STEERING Power Steering System - Hummer H2