Motor And Brake; Description; Maintenance; Cable Guard Roller And Cable Guide Roller - Manitowoc Grove TMS700E Service And Maintenance Manual

HOIST AND COUNTERWEIGHT

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.
3. If needed, tag and disconnect wires from the hoist drum
indicator parts. Then remove these parts from the hoist.
4. Tag and disconnect the hydraulic lines from the motor
and the brake valve. Cap or plug all lines and openings.
5. Remove the four bolts and washers 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.
6. Cover the motor opening in the brake cylinder to protect
drive components inside the hoist drum. As needed,
secure the brake clutch from 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 to the inner race of the brake
clutch when installing the motor and attached brake
valve. Apply Loctite No. 243 to the bolts for the motor.
Secure the motor and brake valve to the brake cylinder
with bolts and washers. Torque bolts to 382 Nm (282 lb-
ft).
4. Connect the hydraulic lines to the motor and brake valve
as tagged during removal.
5-8
5. Reinstall any hoist drum rotation indicator parts removed
earlier, if done. Connect electrical wires as tagged
during removal. Torque CPU bolt according to Fasteners
and Torque Values, page 1-12. Adjust sensor per
instructions in Hoist Drum Indicator System, page 5-10.
6. Fill the drum with oil. Refer to Lubrication, page 9-1 in
this manual.
CABLE GUARD ROLLER AND CABLE
GUIDE ROLLER

Description

The main and auxiliary hoists are equipped with a cable
guard roller on the forward side of the hoist and a cable guide
roller on the top rear of the hoist. The main hoist cable guide
roller is used to keep the hoist cable from coming in contact
with the boom. When the crane is also equipped with an
auxiliary hoist, the cable guide roller is used to keep the hoist
cable from the auxiliary hoist from otherwise coming in
contact with the main hoist.
The cable guard roller on each hoist aids in rolling up the
cable smoothly and paying it out smoothly without tangling. A
pair of cable tension brackets holds each cable guard roller
to the cable so the related cable guard roller can apply a
downward spring pressure against the cable onto the hoist
drum. This ensures the cable will be uniformly wound onto
the hoist drum, and will also prevent the cable from jumping
under abnormal line conditions.

Maintenance

Refer to Figure 5-4.
Removal
1. Remove attaching hardware holding the shaft of the
cable guard roller to the cable tension brackets. Remove
shaft and cable guard roller from cable tension brackets.
Account for any shims and other attaching hardware.
2. Loosen jam nuts and eyebolts to lessen tension of the
springs for the cable tension brackets. Remove springs.
3. Remove attaching hardware to free each cable tension
bracket from the hoist. Remove each cable tension
bracket.
4. Remove attaching hardware holding the shaft of the
cable guide roller to the hoist. Remove shaft and cable
guide roller from the hoist.
Cleaning and Inspection
1. Clean all rust and dirt from the cable guard roller,
springs, shaft, cable tension brackets, and attaching
Published 01-29-2015, Control # 512-01
TMS700E SERVICE MANUAL