Manitowoc Grove GRT8100 Service Manual

6-6
Published 3/26/2018, Control # 596-05
SWING SYSTEM GRT8100 SERVICE MANUAL
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. Repair 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.
12. Swing motor turning
in wrong direction.
a. Improper port connections. a. Reverse port connection.
b. Improper wiring connection b. Inspect wiring and connections
13. Swing motor noisy. a. Air in system. a. Refer to Hydraulic System, page 2-1, for
removal of air from the system.
b. Motor binding. b. Repair or replace motor.
Symptom Probable Cause Solution

Manitowoc Grove GRT8100 Specifications

General

Brand	Manitowoc
Model	Grove GRT8100
Category	Construction Equipment
Language	English