Hummer H1 (2006+). Manual - part 10

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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 General Information, Lubrication and Maintenance  1-39

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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

1-40

General Information, Lubrication and Maintenance

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Master Cylinder Fluid Level Check

CAUTION: Use DOT 3 brake fluid only. Failure to use the proper fluid may affect brake performance or damage brake compo-
nents.

Check master cylinder fluid level monthly. Correct fluid level is to within 1/2 in. (13 mm) from the “MAX” indicator.

Clean the master cylinder cap and exterior before checking fluid level. Dirt on the cap must not be allowed to enter the reservoirs.

Add DOT 3 fluid if necessary and reinstall the cap (Figure-1-37).

Figure 1-37:   Master Cylinder Cap Location

Wheels/Tires/CTIS

Inspect tire and wheel condition. Look for loose wheel nuts and rim stud nuts, or dented, deformed wheel rims. Note tire tread wear
and sidewall condition. If the vehicle is used for extensive off road operation, check the sidewalls for bulges, bead damage, cuts,
fabric breaks.

If the tire treads are worn, note type of wear. If wear is only on one shoulder, toe setting or camber may be incorrect. If tires are
scalloped or worn at crown only, or both shoulders, inflation pressures are probably incorrect.

If the vehicle is equipped with CTIS, cycle the system and check operation. Verify tire inflation pressures with an accurate gauge.

Serpentine Belt

Replace the belt if frayed, cut, or torn. Minor, small surface cracks within the belt grooves are normal. Do not replace the belt un-
less cracks extend all the way through or across the belt face.

Body Lubrication Points

Every 6 months or 6,000 mi (9,700 km), whichever occurs first, lubricate the: hood hinge, hood stops, tailgate hinges, door hinges,
door handles, parking brake lever and service brake pedal push rod stud (Figure-1-38). Suggested lubricants include engine oil or
ATF for hinges; LPS silicone lube for linkages, handles, and brake push rod; white grease for seat tracks, window regulators and
park brake lever. Door locks should use a graphite based lubricant such as Lock-Eze. Refer to the Recommended Fuel/Fluids/Lu-
bricants/Capacities section for more detailed lube information.

MASTER CYLINDER

CAP

MAX FLUID

LEVEL

INDICATOR

12-1-05

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 General Information, Lubrication and Maintenance  1-41

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Figure 1-38:   Body Lubrication Points

ESSENTIAL TOOLS

NOTE:  See page 1-1 of the 2006 Service Parts Catalog for information on ordering Kent-Moore tools.

Engine

Tool No.

Description

EN-47913

Wrench, Belt Tensioner

J–23523-F

Harmonic Balancer Remover/Installer Set

J–23951

Water Manometer

J–26999-10

Compression Gauge Adapter

J–26999-20

Adapter, Compression Gauge

J–26999-30

Compression Gauge Adapter

J–34826

 Socket, 36mm 12 Point

J–42000-EU

Digital Battery Tester

J–44640

Installer, Valve Stem Seal

J–44641

Remover, Rear Crankshaft Seal

J–44642

Installer, Rear Crankshaft Seal

J–44643

Flywheel Holder

J–44644

Remover, Front Crankshaft Seal

J–44645

Installer, Front Crankshaft Seal

J–44646

Compressor, Valve Spring (On-Vehicle)

J–44648-A

Storage Case - Duramax 6.6L Tools

J-45059

Angle Meter

J–46594

Tool, Injector Removal

DOOR

TRANSFER CASE

DOOR

DOOR

TAILGATE

DOOR

TRANSMISSION

SEAT 

PARKING BRAKE 

SERVICE BRAKE PEDAL 

HOOD

SHIFT LINKAGE

SHIFT LINKAGE

PUSH ROD STUD

LEVER

 HINGE

HINGE

HANDLE

TRACKS

HINGE

 LOCKS

 HINGE

CENTER
 HOOD
  STOP

HOOD
 STOP

 (GREASE)

  HOOD
   STOP
(GREASE)

(GREASE)

11-1-05