BRADEN PD12C Series Installation Maintenance And Service Manual page 30

11. Lubricate the pilot, oil seal and bearing surfaces of
the brake cylinder and carefully install brake cylinder
into base and drum. Locate the brake release port
toward the lower rear corner of the base. Tighten
brake cylinder capscrews to recommended torque.
12. Install the brake clutch assembly with the short end
of the inner race toward motor.
When installed correctly, the inner race should turn
freely in the opposite direction the drum turns to pull
wire rope in. An easy way to check the rotation is to
hold the outer race in one hand, and rotate the inner
race.
If the clutch free wheels in the wrong direction, dis-
assemble the clutch and reverse the inner race.
Refer to "Brake Clutch Service" for additional infor-
mation.
Be certain the snap ring is seated in the groove in
the splined bore of the inner race. This snap ring will
keep the brake clutch assembly correctly positioned
in the center of the friction brake pack. Binding of the
brake or brake failure may occur if this snap ring is
omitted.
13. If the brake discs are misaligned, preventing the
installation of the clutch, then with a hand pump,
apply 750-1000 psi to the brake release port. The
brake discs will move freely with the brake released,
permitting alignment of the discs, brake clutch and
input sun gear.
14. Install the hoses and fi ttings to the brake cylinder
release port.
15. Install a new O-ring on the motor pilot then lubricate
with petroleum jelly or gear oil.
NOTE: The following caution DOES NOT apply to
PD17A hoists. Proceed to step 16.
CAUTION
!
Care must be taken to assure the primary thrust plate
remains properly located in its counterbore when the
motor is installed for the fi rst time, or is being rein-
stalled on the hoist. It is possible for the primary
thrust plate to drop out of its counterbore and become
wedged between the planet gears and the planet car-
rier. If the hoist is operated with the primary thrust
plate wedged between primary gears and the planet
carrier, or with a thrust washer out of position, severe
damage to internal hoist components could result.
30
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