User Manual

WARNING
Lift axles that are not equipped with
parking
brakes should be fully raised
when parking the vehicle. Lift axles,
that are not equipped with parking
brakes, left in the down position while
parked, in certain cases, could cause
the parked vehicle to roll, causing an
accident involving death or personal
injury.
1. Set the parking brake before
leaving the driver
’s seat. To hold
your vehicle while it is parked, DO
NOT rely on:
• Air Brakes
• Hand Control Valve for Trailer
Brakes
• Engine Compression
2. If you are parked on a steep grade,
block the wheels.
3. Drain water from the air reservoirs.
While the engine and air supply
system are still warm, drain
moisture from the air reservoirs.
Open the reservoir drains just
enough to drain the moisture. Don’t
deplete the entire air supply
. Be
sure to close the drains before
leaving the vehicle.
4. Secure the vehicle. Close all the
windows and lock all the doors.
Antilock Brake Systems
(ABS)
This vehicle may be equipped with an
ABS, which reduces the possibility of
wheel lock-up. If a wheel is about to lock
during braking, the ABS will automatically
adjust air pressure to the brake chambers
on the appropriate wheel(s) to prevent
wheel lock-up. The ABS is automatically
turned on when the ignition switch is turned
on.
DRIVING - Antilock Brake Systems (ABS)
Y53-6113-1A1 (11/20) 165
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