Peterbilt Medium Duty Trucks Operator's Manual after 1-07

Operating Instructions
WARNING! If the air pressure falls below 60 psi
(414 kPa) the spring brakes may stop the vehicle
abruptly, which could result in an accident and/
or injuries. Observe the warning light in the
panel. If it comes on, do not continue to drive the
vehicle until it has been properly repaired or serviced.
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. Without the use of your service
brakes, your spring brakes could suddenly
apply. This could cause a wheel lock-up, loss of
control, or over-take by following vehicles. You
could be in an accident and severely injured.
•Bring the vehicle to a safe stop right away, while
you still have control of the vehicle.
Air Loss Emergency Procedure
Instruments and Controls
1. Slow down carefully.
2. Move a safe distance off the road and stop.
3. Place the transmission in park and set the parking brake.
(See Pages 68 and 74 for transmission shifting and parking
brake information.)
4. Turn OFF the engine.
5. Turn ON the emergency flasher (See “Emergency
Flasher Switch” on page 55) and use other warning
devices to alert other motorists.
Medium Duty (R10/06) Y53-6008 – 27 –