Hummer H1 Service Manual page 395

6-12 Wheels and Tires/Central Tire Inflation System (CTIS)
RUNFLAT COMPRESSOR BELT REPLACEMENT
Installation
COMPRESSOR
Figure 6-21: Runflat Compressor Belt Replacement
NOTE: Belt overlap is to be positioned so that you have equal
amount of belt on each side of the worm gear shaft assembly.
Perform steps 1 and 2 for crank handle runflat compressor.
1. Install belt on compressor with bolt and locknut
(Figure 6-21).
2. Loop free end of belt around retaining bracket
(Figure 6-22).
RETAINING
BRACKET
Figure 6-22: Runflat Compressor Belt Installation
TIRE, ONE-PIECE ALUMINUM WHEEL
(OPTION), AND TWO-PIECE RUNFLAT SER-
VICE
CAUTION: It is not recommended mixing one-piece wheel and
runflat assemblies and two-piece take-apart wheel and runflat
assemblies on the same vehicle. Runflat profiles differ between
the two types of wheel assemblies.
Disassembly
1. Remove the center cap.
If the vehicle is equipped with a Central Tire Inflation System
(CTIS), perform steps a and b.
a.
BELT
b.
2. Remove wheel/tire assembly from vehicle.
3. Inspect 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. Remove valve cap and core from air valve and deflate tire.
Run a piece of wire through air valve to ensure it is not
plugged.
WARNING: Balance weights contain lead. Wash hands
after handling.
6. Remove balance weights from wheel if present. Discard
balance weights.
7. Install wheel/tire assembly on tire machine.
8. Using tire machine break loose both tire beads.
9. Lubricate outside tire bead and use tire machine to remove
bead from wheel flange.
BELT
10. Pull tire bead up away from wheel to expose runflat
assembly. This can be accomplished with pry bars or a
bead spreader devise (Figure 6-23).
_______________
Release the quick disconnect fitting located at the
center of the geared hub spindle on all four wheels.
Remove the 3/4 inch brass fitting from the center of
the geared hub spindle on the wheel(s) to be worked
on.
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