Hummer H1 (2006+). Manual - part 21

1-36

General Information, Lubrication and Maintenance

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Figure 1-28:   Coupler Shaft Grease Points

Universal and Slip Joint Lubrication

Lubricate U-joints with a multipurpose, NLGI-LB grade chassis grease.

Lubricate propeller shaft universal and slip joints every 6,000 mi (9,700 km), or semiannually, whichever occurs first. Use a hand
operated or low-pressure air powered lubrication gun. If operating conditions are severe service at 1,000 mi. (1,600 km) intervals.

The rear propeller shaft U-joints have two grease fitting locations (Figure-1-29). The front shaft has four fitting locations (Figure-1-30)

Figure 1-29:   Propeller Shaft Lube Points

GREASE

ZERKS

GREASE

ZERKS

U-JOINT LUBE FITTINGS

12-1-05

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 General Information, Lubrication and Maintenance  1-37

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Figure 1-30:   Front Propeller Shaft Lube Points

Steering and Suspension Lubrication Points

Lubricate steering and suspension components every 6,000 mi. (9 700 km), or semiannually, whichever occurs first. If operating
conditions are severe, service at 1,000 mi. (1 600 km) intervals.

Figure 1-31:   Ball Joint/Radius Rod Lube Points

Suspension lube points include the upper and lower ball joints and the rear suspension radius rods (Figure-1-31). Steering lube
points include the tie rod ends, idler arm, steering arm, and intermediate steering shaft ( Figure 1-32  through  Figure 1-34).

Use a hand operated or low pressure air powered lube gun filled with a multipurpose chassis grease. NLGI-LB classification lubri-
cating grease is recommended.

LUBE FITTING

LOCATION

LUBE FITTING

LOCATION

RADIUS ROD
LUBE FITTING

UPPER BALL

JOINT FITTING

LOWER BALL

JOINT FITTING

11-1-05

1-38

General Information, Lubrication and Maintenance

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Figure 1-32:   Idler Arm and Tie Rod Lube Points

Figure 1-33:   Tie Rod and Steering Arm Lube Points

Figure 1-34:   Intermediate Steering Shaft Lube Points

IDLER ARM

FITTINGS

TIE ROD END

FITTING (2)

STEERING ARM FITTING

TIE ROD END FITTINGS

LUBE FITTINGS

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Power Steering Fluid

Check the fluid level in the power steering reservoir monthly and adjust level as necessary. If fluid is hot, level should be between
“HOT” and “COLD” marks on the cap indicator. If fluid is cool, level should be between “ADD” and “COLD” marks. In either
condition, level must be above “ADD” mark.

NOTE: Power steering fluid does not require periodic replacement. 

Figure 1-35:   Power Steering Pump Reservoir 

Cooling System Fluid Level Check

Check coolant level at the surge tank monthly and adjust level as necessary. Level should be at, or above, the cold fill line (Figure-
1-36).

Figure 1-36:   Surge Tank Coolant Level Indicator Location

POWER STEERING

PUMP RESERVOIR

FILLER CAP

SURGE TANK

COLD FILL LINE