6-6
Published 01-29-2014, Control # 496-00
SWING SYSTEM TMS800E SERVICE MANUAL
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. Electrical connectors/wiring. c. Inspect connectors and wiring.
d. Improperly lubricated swing bearing. d. Lubricate bearing per
recommendations.
e. Improper size hose and/or fittings
installed.
e. 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.
l. Two speed swing valve adjustment. l. Check adjustment. Repair or replace
valve.
m. Hydraulic pressures and EEPROMS
not setup correctly.
m. See pressure setting procedure.
5. Swing operation
slow in one
direction only.
a. Crane not level. a. Level crane.
b. Damaged swing directional control
valve.
b. Replace the swing directional control
valve.
c. Clogged or restricted hose. c. Replace hose or fitting.
d. Improperly torqued turntable bearing. d. Torque turntable bearing.
e. Hydraulic pressures and EEPROMS
not setup correctly.
e. See pressure setting procedure.
6. Swing brake
operation erratic.
a. Improper brake adjustment. a. Adjust brake.
b. Air in swing brake system. b. Bl
eed brake system.
c. Dirty or glaz
ed brake disc. c. Clean or replace disc.
d. Kinked or bent lines and/or hoses and
fittings.
d. Straighten or replace as required.
e. Hydraulic pressures and EEPROMS
not setup correctly.
e. See pressure setting procedure.
7. Swing brake
system will not
operate.
a. Damaged swing brake release valve. a. Replace cartridge.
b. Internal damage to the swing brake
assembly.
b. Repair or replace affected parts.
c. Loose or restricted brake lines or
fittings.
c. Tighten or replace lines and fittings.
d. Hydraulic pressures and EEPROMS
not setup correctly.
d. See pressure setting procedure.
Symptom Probable Cause Solution
Reference Only
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