8. Install pressure plate into brake cylinder followed
by the piston backup ring. The close-fitting piston
backup ring may be depressed slightly to one side
to lodge the backup ring in the brake cylinder bore
and temporarily hold the pressure plate and springs
in place while you lower the brake cylinder over the
motor support.
9. Apply petroleum jelly to the entire sealing surface of
the brake cylinder and to the piston seal. Install the
brake cylinder over the motor support being careful
to avoid damaging the piston seal or motor support
O-ring. (A press may be necessary to avoid cocking
the brake cylinder during installation.)
10. Install motor support capscrews and tighten evenly
to recommended torque.
BRAKE CYLINDER PRESSURE TEST
1. Install the –4 JIC fitting into the brake release port.
Connect a hand pump with accurate 0-2000 PSI
(0-13,800 kPa) gauge and shut-off valve to this
fitting. Apply 1000 PSI (6,900 kPa) to the brake.
Close shut-off valve and let stand for five (5) min-
utes. If there is any loss of pressure in five (5) min-
utes, the brake cylinder should be disassembled for
inspection of the sealing surfaces and brake piston
seal.
2. WHILE PRESSURE IS APPLIED AND THE BRAKE
RELEASED, install the brake clutch assembly in
the brake pack. Turn the clutch back and forth as
you align the outer race splines with the brake disc
splines.
3. Release the pressure on the brake cylinder then
remove the brake clutch assembly. The brake cyl-
inder assembly is now complete and ready to be
installed in the winch.
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