Hummer H1 Service Manual page 386

________________
®
c. Remove the brass fitting from the center of the geared
hub spindle on the wheel(s) to be worked on.
d. Use tire chalk to mark two of the geared hub spindle
assembly studs nearest the air valve.
WARNING: In all disassembly operations, ensure tire
is totally deflated before removing wheel half locknuts.
Failure to follow proper safety precautions could cause
serious injury or death.
2. Remove wheel/tire assembly from vehicle.
3. Inspect vehicle geared hub spindle studs for bending,
looseness, or stripped threads. Replace if damaged.
4. Inspect lug nuts for fatigue, stripped threads, or other
damage. Replace if damaged.
5. Use tire chalk to mark the valve location on the sidewall of
the tire.
6. Remove valve cap and core from air valve and deflate tire.
7. Run a piece of wire through air valve to ensure it is not
plugged (Figure 6-3).
WARNING: Do not use unauthorized tools. Damage to
equipment or serious injury may result.
VALVE CAP
VALVE CORE
CORE
HOUSING
INSERT
O-RING
LOCKNUT
05745159
Wheels and Tires/Central Tire Inflation System (CTIS)
OUTER
RIM HALF
ALIGNMENT
HOLE
CLIP-ON
BALANCE
WEIGHT
Figure 6-4: Two-Piece Wheel Breakdown
8. Remove wheel half nut covers.
9. When tire is fully deflated, use a circular pattern and
loosen twelve wheel half locknuts securing rim halves
together. If you hear air escaping, do not proceed. Wait
until the sound stops and recheck core housing for
obstructions. When you are certain the tire is fully
deflated, continue to remove wheel half locknuts. Discard
locknuts.
WARNING: Never inflate a two-piece wheel assembly
with the wheel locknuts removed in an attempt to sepa-
rate inner and outer rim halves. The assembly will sepa-
rate under pressure resulting in serious injury or death.
10. Remove outer rim half from inner rim and tire.
NOTE: Perform steps 6 and 7 only if damage to core housing,
insert, or O-ring is evident.
11. Inspect valve core housing and insert for damage. Replace
both if damaged.
12. Remove valve core housing from insert. Remove insert
and locknut from outer rim half.
WHEEL HALF
LOCKNUT
TIRE
O-RING SEAL
INNER RIM HALF
00-S06-007
6-3