PART 8: MAINTENANCE AND SERVICE
PB1319 (CAT. NO. 5296 ) —157— 22-01691 (R02/02)
Cab Heater-Air Conditioner
The combined use of the heater and optional air conditioner provides
comfort for those in the cab through accurate control of the cab envi-
ronment in all weather conditions. Regular attention will help you
keep your unit running well.
Perform the following checks every 3 months or 30,000 miles / 48,000
km, whichever occurs first:
Heater
• Check all heater controls for full-range operation.
WARNING! Although the brakes will continue to operate
with a malfunction in either circuit, the vehicle should not
be operated until the system is repaired, and both braking
circuits, including all pneumatic and mechanical compo-
nents, are working properly.
CAUTION: Do not attempt to recycle the anti-lock system
until the vehicle has been brought to a full stop.
NOTE: If one wheel on any driven axle continues to slip or spin
for approximately 4 seconds, this will cause the anti-lock con-
troller for that axle to go into the fail-safe mode, and the warning
light will give a shutdown signal. In this case, the anti-lock sys-
tem can be turned back on, and the warning light extinguished,
by turning the key switch OFF and ON, after the vehicle has
been brought to a full stop. When the key switch is turned back
on, the warning light will illuminate and remain on for 3 to 5 sec-
onds. This is a built-in function test of the warning light.
NOTE: Keep the engine exhaust system and the vehicle’s cab/
sleeper ventilation system properly maintained. It is recommended
that the vehicle’s exhaust system and cab/sleeper be inspected
•
By a competent technician every 15,000 miles
•
Whenever a change is noticed in the sound of the
exhaust system
•
Whenever the exhaust system, underbody, cab or
sleeper is damaged
NOTE: To allow for proper operation of the ventilation system
•
keep the inlet grille at the base of the windshield clear of
snow, ice, leaves and other obstructions at all times.
•
keep the exhaust pipe area clear to help reduce the
buildup of exhaust gases under the vehicle.
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