HOIST AND COUNTERWEIGHT RT9130E-2 SERVICE MANUAL
5-12 Published 11-22-2016, Control # 345-12
MOTOR AND BRAKE
Description
Each hoist has a hydraulic motor, a brake valve, a brake
cylinder, and a brake clutch which control motion of the
hoist’s drum. These parts mount on one of the support end
brackets of the hoist. The hydraulic motor connects to the
hoist’s brake clutch, which in turn connects to the gear train
of the hoist.
Maintenance
Removal
1. Drain the oil from the hoist drum by removing the plugs.
Reinstall the plugs when the drum is finished draining.
2. Power-wash the hoist on the motor side to wash away
potential contaminants from the drive components of the
hoist. Dry the area with compressed or forced air.
3. If needed, tag and disconnect wires from the hoist drum
indicator parts. Then remove these parts from the hoist.
4. Tag and disconnect wiring from the hoist motor’s high
speed solenoid valve.
5. Tag and disconnect the hydraulic lines from the motor
and the brake valve. Cap or plug all lines and openings.
6. Remove the four capscrews and lockwashers to free the
motor and brake valve from the brake cylinder and brake
clutch on the support end bracket. Remove the motor
and brake valve as a unit. Discard the O-ring.
7. Cover the motor opening in the brake cylinder to protect
drive components inside the hoist drum. As needed,
secure the brake clutch located inside the brake
cylinder.
Installation
NOTE: Assure the primary thrust plate remains properly
located in its counterbore when installing the motor.
If operating the hoist with the primary thrust plate
wedged between the primary gears and the planet
carrier, or with a thrust washer out of position,
severe damage to internal hoist parts could result.
1. Uncover the motor opening in the brake cylinder. Verify
the brake clutch is secure in the brake cylinder. Verify
these parts are clean.
2. Install a replacement O-ring on the motor’s pilot after
lubricating it with gear oil or petroleum jelly.
3. Engage the motor shaft with the inner race of the over-
running clutch and lower the motor into place. Apply
Loctite No. 243 to the capscrews for the motor. Secure
the motor and brake valve to the brake cylinder with
capscrews and washers.
4. Connect the hydraulic lines to the motor and brake valve
as tagged during removal.
5. Reinstall any hoist drum rotation indicator parts removed
during removal. Connect electrical wires as tagged
during removal. Tighten CPU bolt. Adjust sensor per
instructions in Hoist Drum Rotation Indicator System,
page 5-18.
6. Reinstall electrical wiring to hoist motor’s high speed
solenoid valve as tagged during removal.
7. Fill the drum with oil. Refer to Lubrication, page 9-1.
To Next Page
Loading...
Need help?
General
