Hummer H1 (2002+). Manual — part 8

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General Information, Lubrication and Maintenance 1-29

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05745159

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 be-
tween ÒHOTÓ and ÒCOLDÓ marks on the cap indicator. If fluid
is cool, level should be between ÒADDÓ and ÒCOLDÓ marks.
In either condition, level must be above ÒADDÓ mark.

NOTE: Power steering fluid does not require periodic replace-
ment.

Figure 1-32: 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 1-33).

Figure 1-33: Surge Tank Coolant Level

Indicator Location

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
components.

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

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

Add DOT 3 fluid if necessary and reinstall the cap (Figure 1-34).

Figure 1-34: 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 ex-
tensive 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, infla-
tion pressures are probably incorrect.

If the vehicle is equipped with CTIS, cycle the system and
check operation. Verify tire inflation pressures with an accu-
rate 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
unless cracks extend all the way through or across the belt face.

FILLER CAP

SURGE TANK

COLD FILL LINE

MASTER CYLINDER

CAP

MAX FLUID

LEVEL

INDICATOR

1-30

General Information, Lubrication and Maintenance

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CDR Valve

Clean the CDR valve with parts solvent and allow to dry. Re-
place the valve if oil soaked, or if it wonÕt sustain vacuum/at-
mospheric pressure testing, see ÒCDR ValveÓ in Section 3 for
pressure testing instructions. Also replace the valve hose if
cracked, brittle and hard.

Body Lubrication Points

Every 6 months or 3,000 mi (4 800 km), whichever occurs
first, lubricate the: hood hinges, hood stops, tailgate hinges,
door hinges, door handles, parking brake lever, service brake
pedal push rod stud, transfer case shift linkage, and transmis-
sion shift linkage (Figure 1-35). Suggested lubricants include
engine oil or ATF for hinges; LPS silicone lube for linkages,
handles, and brake push rod; white grease for seat tracks, win-
dow regulators and park brake lever. Door locks should use a
graphite based lubricant such as Lock-Eze. Refer to the Rec-
ommended Fuel/Fluids/Lubricants/Capacities section for more
detailed lube information.

Check condition of the spare tire and swing away carrier mech-
anism, if equipped. Be sure the spare is properly inflated and
the carrier operates smoothly, without bind.

Figure 1-35: Body Lubrication Points

DOOR

TRANSMISSION

DOOR HINGE

TAILGATE

HOOD

SERVICE BRAKE PEDAL

PARKING

TRANSFER CASE

DOOR

SHIFT LINKAGE

PUSH ROD STUD

HINGE

SHIFT LINKAGE

HOOD STOP

HOOD

SEAT

DOOR

SWING AWAY

TIRE CARRIER

(IF EQUIPPED)

HANDLE

BRAKE

LEVER

STOP

HINGE

HINGE

LOCKS

TRACKS

CENTER

HOOD

STOP

WAGON

DOOR

HINGES

AND LOCKS

(GREASE)

(GREASE)

(GREASE)

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General Information, Lubrication and Maintenance 1-31

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05745159

ESSENTIAL TOOLS

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

Engine

Fuel, Emissions and Exhaust

Transmission/Transfer Case

Tool No.

Description

JÐ23523-F

Harmonic Balancer Remover/Installer Set

JÐ26999-30

Compression Gauge Adapter

JÐ22102

Front Crankshaft Seal Installer

JÐ26999

Compression Gauge

JÐ39084

Rear Main Seal Installer

JÐ33139

Engine Lifting Sling and Bracket

JÐ23951

Water Manometer

JÐ35555

Vacuum (MITY-VAC) Pump

JÐ8001

Dial Indicator Set

JÐ23129

Universal Seal Remover, use with slide hammer JÐ6125-1B

JÐ41613

Turbocharger Inlet Guard

JÐ41515-A

Glow Plug Socket

JÐ41240-1

Spanner, Fan Clutch

JÐ41240-5A

Wrench, Fan Clutch

Tool No.

Description

JÐ29075-AMG

Fuel Injector Pressure Test Tool

JÐ29872-A

Injection Pump Adjusting Tool (used with ratchet handle)

JÐ29873

Fuel Injector Socket (30mm)

JÐ29698-A

Injection Line (ßare nut) Wrench, 3/4

JÐ28552-A

Fuel Pressure Gauge

JÐ38641-B

Diesel Fuel Hydrometer

JÐ34151

Housing Pressure Adapter

JÐ41711

Injection Pump Timing Wrench, 6.5 Turbo

JÐ28552-100

Adapter, Fuel Line

Tool No.

Description

JÐ39544-AMG

Transmission Oil Cooler Flush Kit

JÐ35944-500

Cooler Line Adapters

JÐ8614-01

Yoke Holding Tool

JÐ8092

Universal Driver Handle

JÐ25025-B

Dial Indicator and Guide Pin Set

JÐ39775

Transmission Test Jumper Harness

JÐ21867

Pressure Gauge and Hose Assembly

JÐ33831

Input Seal Installer

JÐ33835

Pump Housing Seal Installer

JÐ38869

Output Shaft Seal Installer

JÐ41623

Oil Cooler Release Tool

JÐ42543

Selector Shaft Seal Remover/Installer

JÐ38694

Installer, Oil Pump to Converter Seal

J-8614-5

Bolt Kit, Yoke Holding Tool

1-32

General Information, Lubrication and Maintenance

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Wheels, Tires and CTIS

Brakes

Steering

Axles/Suspension and Frame

HVAC

Tool No.

Description

JÐ42557

Cam Socket

Tool No.

Description

J

Ð

42553

Disc Brake Tool Kit

Tool No.

Description

JÐ24319-B

Steering Linkage and Tie-Rod Puller

JÐ25033-C

Pump Pulley Installer

JÐ33141

Adapter Fittings (used with J-25323)

JÐ25034-C

Pump Pulley Remover

JÐ25323

Power Steering System Analyzer

JÐ42548

Puller, Pitman Arm

JÐ8092

Universal Driver Handle

Tool No.

Description

JÐ8092

Universal Driver Handle

JÐ24319-B

Steering Linkage and Tie Rod Puller

JÐ8001

Dial Indicator

JÐ29162

Rear Retainer Seal Installer

JÐ33143

Input Seal Installer

JÐ8614-O1

Yoke Holding Tool (includes JÐ8614-5 bolt kit)

JÐ42545

Clampnut Socket

JÐ35184

Spindle Seal Installer

JÐ38869

Seal Installer

JÐ35910

Axle Boot Crimping Tool

JÐ42546

1/4 in. Drive Torque Wrench (Preset)

JÐ42547

3/8 in. Drive Torque Wrench (Preset)

JÐ42591

Steering Cover Seal Installer

Tool No.

Description

JÐ42549

HVAC Anemometer

JÐ42550

HVAC Flow Meter Adapter Kit

JÐ42551

Leak Detector, A/C R134a