Regional Haul Model Operator's Manual - Peterbilt Motors Company

BRAKE SYSTEM
NOTE: If one wheel on any driven axle continues
to slip or spin for approximately 4 seconds, this
will cause the anti-lock controller 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 system 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 seconds.
This is a built-in function test of the warning
light.
WARNING! Do not attempt to recycle the antilock
system by turning the keyswitch OFF and
ON until the vehicle has been brought to a full
stop and the parking brakes set. Failure to do
so could adversely affect steering and braking
control, and may result in loss of vehicle
control which may result in an accident
involving death or personal injury.
PREVENTIVE MAINTENANCE
WARNING! Do not operate the vehicle in the
event of a malfunction in any air or hydraulic
circuit. Such a malfunction may prevent the
brake system from operating properly, and
could result in an accident causing death or
serious personal injury. The vehicle should
not be operated until the system is repaired
and both braking circuits, including all pneumatic,
hydraulic, and mechanical components
are working properly.
– 188 – Y53-6033 Regional Haul (R05/10)