30
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.
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 free-
ly 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, disassem-
ble the clutch and reverse the inner race. Refer to “Brake
Clutch Service” for additional information.
13. If the brake discs are misaligned, preventing the instal-
lation of the clutch, then with a hand pump, apply 750-
1000 psi to the brake release port.
Th
e brake discs will
move freely with the brake released, permitting align-
ment of the discs, brake clutch and input sun gear.
Be certain the snap ring is seated in the groove in the
splined bore of the inner race.
Th
is snap ring will keep the
brake clutch assembly correctly positioned in the center of
the friction brake pack. Binding of the brake or brake fail-
ure may occur if this snap ring is omitted.
Care must be taken to assure the primary thrust plate re-
mains properly located in its counterbore when the motor
is installed for the
fi
rst time, or is being reinstalled 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 carrier. 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 po-
sition, severe damage to internal hoist components could
result.
CAUTION
!
!
