Hummer H1 Service Manual page 392

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CAUTION: Tighten locknuts gradually to avoid bending and/
or breaking studs, or damage to wheel components.
NOTE: If vehicle is equipped with central tire inflation sys-
tem, position shield mounting bracket on outer rim.
15. Line up alignment holes in both wheel halves and secure
outer rim half on inner rim half with twelve locknuts.
NOTE: If tire bead does not seat on the rim flange after infla-
tion, deflate tire completely and remove from rim. Check to en-
sure that a 16.5 inch diameter tire is being used. Also check for
bent or damaged components and replace if necessary. Lubri-
cate tire bead and rim mating surfaces and reinstall tire on rim.
NOTE: Never tighten locknuts when tire is in an inflated con-
dition. This will result in less accurate torque. Tighten locknuts
to proper torque specifications every 3,000 miles (4800 km).
16. Preliminarily tighten locknuts to 85 lb-ft (115 N•m) in
tightening sequence shown (Figure 6-15).
5
9
3
12
8
Figure 6-15: Locknut Tightening Sequence
17. Retighten locknuts to 125 lb-ft (170 N•m) in sequence
shown.
18. Check wheel assembly for gaps at each stud. Use a 0.0015
inch (0.038 mm) thickness gauge to detect gaps. If gaps
are detected, disassemble and reassemble wheel assembly
and recheck for gaps. If gaps are still detected, replace
inner rim half (Figure 6-16).
19. Install wheel half locknut covers.
05745159
Wheels and Tires/Central Tire Inflation System (CTIS)
1
7
11
4
10
6
2
S06-103.1
STUD
Figure 6-16: Checking Wheel Stud Gap
WARNING: Never inflate a tire without having
checked wheel half locknut torques to ensure the wheel
locknuts are tightened to specifications. A wheel with
improperly tightened locknuts could separate under
pressure, resulting in serious injury or death. Always
use a tire inflation cage for inflation purposes. Stand on
one side of cage during inflation, never directly in front.
Keep hands out of the cage during inflation. Inflate tire
to recommended pressure using a clip-on air chuck. Do
not exceed 50 psi (345 kPa) cold inflation pressure.
Failure to follow these instructions may result in seri-
ous injury or death.
20. Place wheel in safety cage and inflate tire to recommended
tire pressure.
21. Check for leaks around rim edges, insert, and core housing
with soapy solution (Figure 6-17).
6-9
THICKNESS
GAUGE
INNER
RIM HALF