Regional Haul Model Operator's Manual - Peterbilt Motors Company

SPRING BRAKES — MANUAL RELEASE
To move a vehicle immobilized by the spring brakes due
to loss of air pressure in the brake system, perform the following
procedure:
1. Remove the cap from the
spring chamber.
2. Remove the release stud
assembly from the side pocket,
and remove the release nut and
washer from the release stud.
STARTING AND OPERATING THE VEHICLE
4. Insert the release stud
through the opening in the
spring chamber where the cap
was removed. Insert it into the
pressure plate. Turn the
release stud 1/4 turn clockwise
in the pressure plate. This
secures the cross pin into the
cross pin area of the pressure
plate and locks it into the manual
release position.
5. Assemble the release stud
washer and nut on the release
stud.
3. Slide out the release stud.
– 140 – Y53-6033 Regional Haul (R05/10)