EMERGENCY ACTION
TOWING
Parking Brake Mechanical
Release (Disc Brakes)
The brake cylinders have a release
mechanism for the parking brake spring,
which means that the release bolt does
not come out of the brake cylinder.
When you start to release the parking
brake manually, a red plastic plug comes
out of the center of the nut. It is entirely
out after three turns. A total of about 45
turns are needed to fully compress the
parking brake spring. When the parking
brake is fully reinstated, (spring
released), the red plastic plug will return
into the center of the nut.
CAUTION
The maximum torque for the release
mechanism nut is 47 Nm (34.67 ft-lbs).
NOTE
Always ll the parking brake tank with air
when available, and release the parking
brake, to reduce the amount of turning
needed on the release mechanism nut.
The nut should only be released in
exceptional cases, with no air in the
parking brake section.
Plastic Plug for Release Mechanism
315
X Publication_PC28
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