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Published 10-01-2020 Control # 699-00
GRT9165 SERVICE MANUAL
SWING SYSTEM
6
GROVE
2.
Boom swing
operation erratic in
one direction only.
a.
Crane not level.
a.
Level crane using outriggers.
b.
Turntable bearing binding due to
continuous limited swing. (Example:
concrete pourer.)
b.
Rotate machine 360 degrees in both
directions several times and lubricate
bearing.
c.
Restricted hose or fitting.
c.
Replace hose or fitting.
d.
Damaged swing directional control valve.
d.
Replace swing directional control valve.
e.
Damaged swing pinion.
e.
Replace pinion.
f.
Damaged turntable bearing.
f.
Replace turntable bearing.
3.
Boom will not swing
in either direction.
a.
Damaged relief valve.
a.
Remove, clean, and repair or replace
relief valve.
b.
Damaged swing motor.
b.
Repair or replace swing motor.
c.
Swing brake not releasing properly.
c.
Repair as necessary.
d.
Damaged hydraulic remote control valve.
d.
Replace hydraulic remote control valve.
e.
Internal damage to swing box.
e.
Remove swing box and repair.
f.
Worn or damaged hydraulic pump.
f.
Replace pump section.
g.
Damaged swing directional control valve.
g.
Replace swing directional control valve.
h.
Damaged swing pinion.
h.
Replace pinion.
i.
Damaged turntable bearing.
i.
Replace turntable bearing.
j.
Excessive overload.
j.
Reduce load. Refer to load capacity chart.
4.
Swing operation
slow in either
direction.
a.
Damaged relief valve.
a.
Adjust, repair or replace valve.
b.
Improperly adjusted swing brake.
b.
Readjust.
c.
Damaged hydraulic remote control valve.
c.
Replace hydraulic remote control valve.
d.
Improperly lubricated swing bearing.
d.
Lubricate bearing per recommendations.
Refer to
e.
Improper size hose and/or fittings
installed.
e.
Replace hose or fittings. Refer to the
Manitowoc Crane Care Parts Manual.
f.
Clogged or restricted hydraulic hoses or
fittings.
f.
Clean or replace damaged parts.
g.
Worn or damaged output shaft bearings
g.
Replace bearings.
h.
Worn or damaged swing motor.
h.
Repair or replace motor.
i.
Worn or damaged hydraulic pump.
i.
Repair or replace pump.
j.
Crane not level.
j.
Level crane.
k.
Damaged swing directional control valve.
k.
Replace swing directional control valve.
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.
Symptom
Probable Cause
Solution
Summary of Contents for Grove GRT9165
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