Hummer H2. Manual — part 906

Fig. 8: Damaged Areas
Courtesy of GENERAL MOTORS CORP.

Surface depressions on the race and the rollers caused by hard particles of foreign matter. Clean all the parts and
the housings. Check the seals. Replace rough or noisy bearings.

Frettage

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 9: Frettage
Courtesy of GENERAL MOTORS CORP.

Corrosion caused by small relative movement of parts with no lubrication. Replace the bearing. Clean the
related parts. Check the seals. Check for proper lubrication.

Smears

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 10: Smears
Courtesy of GENERAL MOTORS CORP.

Smearing of the metal due to slippage. Slippage can be caused by the following factors:

z

Poor fits

z

Lubrication

z

Overheating

z

Overloads

z

Handling damage

Replace the bearings. Clean the related parts. Check for proper fit and lubrication.

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Stain Discoloration

Fig. 11: Stain Discoloration
Courtesy of GENERAL MOTORS CORP.

Discoloration ranging from light brown to black. This discoloration is caused from incorrect lubrication or
moisture. Reuse the bearing if you can remove the stains with light polishing. Reuse the bearing if there is no
evidence of overheating. Check the seals and the related parts for damage.

Heat Discoloration

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2