Hummer H2. Manual - part 2618

ACCUMULATOR ASSEMBLY 

Removal 

1. Remove the control valve body. See VALVE BODY & PRESSURE SWITCH .  

2. Remove the accumulator cover bolts. See Fig. 15 .  

3. Remove the 1-2 accumulator cover.  

4. Disassemble the 1-2 accumulator as follows: 

A. Blow compressed air into the 1-2 accumulator cover in order to remove the 1-2 accumulator piston. 

See Fig. 16 .  

B. Remove the 1-2 accumulator inner and outer springs.  

5. Inspect the 1-2 accumulator inner and outer springs for cracks.  

6. Remove the 1-2 accumulator piston seal (1) from the 1-2 accumulator piston. See Fig. 17 .  

7. Inspect the 1-2 accumulator piston for the following defects: 

z

Porosity.  

z

Cracks.  

z

Scoring.  

z

Nicks and scratches.  

8. Inspect the 1-2 accumulator cover for the following defects: 

z

Porosity.  

z

Cracks.  

z

Scoring.  

z

Nicks and scratches.  

See Fig. 18 .  

9. Remove the spacer plate support bolts. See Fig. 19 . 

must be the correct part number for that application. Fasteners requiring 
replacement or fasteners requiring the use of thread locking compound or 
sealant are identified in the service procedure. DO NOT use paints, 
lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces 
unless specified. These coatings affect fastener torque and joint clamping 
force and may damage the fastener. Use the correct tightening sequence 
and specifications when installing fasteners in order to avoid damage to 
parts and systems. 

NOTE:

Tools required: Dial Indicator Post and Guide Pin Set (J-25025-B), and Transjel 
Lubricant (J-36850). 

NOTE:

Use care not to drop the number one checkball, the 3-4 accumulator 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

10. Remove the spacer plate support.  

11. Remove the spacer plate to valve body gasket, the spacer plate and the spacer plate to transmission case 

gasket. See Fig. 20 .  

12. Remove the 3-4 accumulator piston. See Fig. 21 .  

13. Inspect the 3-4 accumulator spring for cracks.  

14. Remove the 3-4 accumulator piston seal (1) from the 3-4 accumulator piston. See Fig. 17 .  

15. Inspect the 3-4 accumulator piston for the following defects: 

z

Porosity.  

z

Cracks.  

z

Scoring.  

z

Nicks and scratches.  

spring and the 3-4 accumulator pin. 

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 15: Removing Accumulator Assembly Bolts 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2

  

Fig. 16: Removing & Installing 1-2 Accumulator Assembly 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2003-04 AUTOMATIC TRANSMISSIONS Servicing - H2