Ford 2013 F-650 Owner's Manual page 164

Impact wrenches should not be used as they may damage the piston and
prevent proper caging of the spring. Do not apply more than
50 foot-pounds (68 newton-meters) torque to the release bolt nut.
the release stud and nut unless the brake chamber is completely
assembled and is securely clamped.
6. When the air pressure is restored, unscrew and remove the release
stud and install in the carrying pocket. Install the access plug.
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)
Brakes
1. Remove the stud tool and nut
from the carrying pocket on the
brake chamber assembly.
2. Remove the access plug from the
end of the spring chamber.
3. Insert the release stud through
the opening in the chamber and
into the spring pressure plate.
4. Turn the release stud
engage the stud tangs with the slot
in the pressure plate. Keep the stud
engaged and install the nut on the
release stud.
5. Tighten the nut until the spring
is fully caged and the brakes are
released. Do not loosen or remove
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