Air Pressure Gauge - Hummer H1 Service Manual

6-40 Wheels and Tires/Central Tire Inflation System (CTIS)

AIR PRESSURE GAUGE

WARNING: CTIS components are subject to high air
pressure. Always relieve air pressure before loosening
or removing air system components by disconnecting
quick-disconnect valve assemblies. Failure to follow
this warning may result in serious injury.
Removal
1. Remove CTIS instrument cluster panel.
2. Remove lamp from air pressure gauge (Figure 6-57).
3. Disconnect two air pressure indicator lines from air
pressure gauge.
4. Remove two nuts, lockwashers, air pressure gauge, and
bracket from CTIS instrument cluster (Figure 6-57).
Discard lockwashers.
AIR PRESSURE
INDICATOR
LINES
PRESSURE
GAUGE LAMP
SCREW
Cleaning and Inspection
Clean and inspect air pressure gauge and lamp. Check for
cracks and stripped threads. Replace defective parts.
CAUTION: Do not allow sealant into air system. Sealant will
damage CTIS components.
NOTE: Apply sealant to threads prior to installation.
Installation
1.
2.
3.
4. Install CTIS instrument cluster panel.
5.
GAUGE BRACKET
Figure 6-57: Air Pressure Gauge
Install air pressure gauge and bracket on CTIS instrument
cluster with two nuts and lockwashers. Tighten nuts to 8
lb-in. (0.9 N•m) (Figure 6-57).
Connect two air pressure indicator lines to air pressure
gauge.
Install lamp in air pressure gauge.
Start engine and ensure air pressure gauge operates
properly.
AIR PRESSURE
AIR PRESSURE
GAUGE
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