Medium Duty Operator's Manual - Peterbilt Motors Company

OPTIONAL GAUGES
WARNING! The air pressure warning light and
the audible alarm indicate a dangerous situation.
There is not enough air pressure in the
reservoirs for repeated braking and the brake
system has failed. If air pressure falls below
60 psi (414 kPa) the spring brakes could suddenly
apply, causing a wheel lockup, loss of
control, or your vehicle to be overtaken by following
vehicles. You could be in an accident
and severely injured. If these alarms come on
while you are driving, bring your vehicle to a
safe stop right away. If the light and alarm do
not turn off at start-up, do not try to drive the
vehicle until the problem is found and fixed.
Optional Gauges
Maximum transmission temperature may vary, depending
upon the transmission and type of lubricant. Check your
transmission’s owner’s manual.
CONTROLS AND DISPLAY
Forward Drive Axle Temperature Gauge
Rear Drive Axle Temperature Gauge
These gauges indicate the temperature of the lubricant in
your vehicle’s axle(s). These temperatures will vary with
the kind of load you are carrying and the driving conditions
you encounter. Maximum axle temperature may
vary, depending upon the axle and type of lubricant. Very
high temperatures signal a need to have your axle(s) lubrication
checked.
– 42 – Y53-6008A Medium Duty (R05/09)