Manitowoc Grove RT880E User Manual

Grove Published 11-10-2014, Control # 524-00 6-3
RT880E SERVICE MANUAL SWING SYSTEM
6
Maintenance
Troubleshooting
Symptom Probable Cause Solution
1. Boom swing opera-
tion erratic in either
direction.
a. Damaged relief valve. a. Replace relief valve.
b. Swing brake dragging (not releasing
properly).
b. Readjust and/or replace necessary
parts.
c. Low engine rpm. c. Increase engine rpm to obtain smooth
swing operation.
d. Low hydraulic oil. d. Replenish hydraulic oil to proper level.
e. Improper movement of control to
neutral.
e. Feather controls to neutral to maintain
smooth stopping action.
f. Insufficient lubricant on swing bearing. f. Lubricate bearing properly. Refer to
Turntable, page 9-17.
g. Crane not level. g. Level crane using outriggers.
h. Damaged swing motor. h. Repair or replace swing motor.
i. Excessive overload. i. Reduce load. Refer to load capacity
chart.
j. Restricted or partly clogged hydraulic
hose or fittings.
j. Replace hose or fittings.
k. Pump cavitation in swing section. k. Tighten suction hose or replace any
damaged fitting. Check hydraulic tank
level.
l. Improperly torqued turntable bolts. l. Torque turntable bolts evenly.
m. Excessive preload on upper and lower
pinion shaft bearing.
m. Adjust as necessary.
n. Improperly torqued swing motor
attachment bolts.
n. Torque swing motor attachment bolts.
o. Malfunction of the swing box. o. Remove swing box and make
necessary repairs.
p. Worn or damaged pump. p. Repair or replace damaged pump.
q. Damaged swing directional control
valve.
q. Repair or replace swing directional
control valve.
r. Damaged swing pinion. r. Replace pinion.
s. Damaged turntable bearing. s. Replace turntable bearing.
2. Boom swing opera-
tion 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.

Manitowoc Grove RT880E Specifications

General

Brand	Manitowoc
Model	Grove RT880E
Category	Construction Equipment
Language	English