2-15. RELEASE/APPLY PARKING BRAKES (NORMAL).
Release Parking Brakes.
Trailer wheels must be chocked or drawbar connected to truck before coupling trailer
gladhands to truck. Failure to comply may result in injury or death to personnel.
The following procedures are for when the trailer is not hooked to the truck.
Parking brakes are set automatically when gladhands are unhooked.
Parking brakes are released when gladhands are hooked up and trailer air supply knob in
cab is pushed in.
If trailer parking brakes do not release, perform Steps (2) through (10) and pressurize air
Refer to Para 2-20 and chock trailer wheels.
To release trailer parking brakes, push in trailer parking brake knob (1) (located on trailer).
Back truck close to drawbar (2).