Manitowoc Grove RT765E-2 Service And Maintenance Manual

6-5
Published 9-04-2014, Control # 422-08
RT765E-2 SERVICE MANUAL SWING SYSTEM
6
GROVE
5. Swing operation
slow in one
direction only.
a. Crane not level. a. Level crane.
b. Damaged hydraulic remote control
valve.
b. Replace hydraulic remote control
valve.
c. Damaged swing directional control
valve.
c. Replace the swing directional control
valve.
d. Clogged or restricted hose. d. Replace hose or fitting.
e. Improperly torqued turntable bearing. e. Torque turntable bearing.
6. Swing brake
operation erratic.
a. Improper brake adjustment. a. Adjust brake.
b. Air in swing brake system. b. Bleed brake system.
c. Brake pedal not fully retracted. c. Check brake pedal return spring; repair
or replace spring.
d. Dirty or glazed brake disc. d. Clean or replace disc.
e. Malfunction of the glide swing power
brake valve.
e. Repair or replace glide swing power
brake valve.
f. Kinked or bent lines and/or hoses and
fittings.
f. Straighten or replace as required.
7. Swing brake
system will not
operate.
a. Damaged swing brake release valve. a. Replace release valve.
b. Damaged glide swing power brake
valve.
b. Repair or replace glide swing power
brake valve.
c. Internal damage to the swing brake
assembly.
c. Repair or replace affected parts.
d. Loose or restricted brake lines or
fittings.
d. Tighten or replace lines and fittings.
8. Swing brake pedal
is spongy.
a. Damaged glide swing power brake
valve.
a. Repair or replace the glide swing
power brake valve.
b. Loose or restricted brake lines or
fittings.
b. Tighten or replace brake lines and
fittings.
9. Swing brake drags. a. Damaged glide swing power brake
valve.
a. Rep
air or replace the glide
swing
power brake valve.
b. Damaged swing brake release valve. b. Replace release valve.
c. Internal damage to the swing brake
assembly.
c. Repair or replace affected parts.
d. Loose or restricted brake lines or
fittings.
d. Tighten or replace brake lines and
fittings.
10. Boom swings
slowly.
a. Insufficient hydraulic volume. a. Check delivery of hydraulic pump.
Ensure sufficient fluid is available to
pump. Check pump drive speed.
b. Damaged relief valve. b. Adjust, repair, or replace valve.
c. Damaged swing motor. c. Repair or replace motor.
11. Swing motor
continues to
operate when
swing control is in
neutral.
a. Hydraulic remote control valve sticking
or valve otherwise damaged.
a. Repair or replace valve.
b. Control valve sticking or valve
otherwise damaged.
b. Repair or replace valve.
Symptom Probable Cause Solution
Reference Only

Manitowoc Grove RT765E-2 Specifications

General

Brand	Manitowoc
Model	Grove RT765E-2
Category	Construction Equipment
Language	English