Manitowoc Grove TMS700E User Manual

BOOM TMS700E SERVICE MANUAL
4-20 Published 01-29-2015, Control # 512-01
Maintenance
Troubleshooting
Symptom Probable Cause Solution
1. Boom raises
erratically.
a. Low hydraulic oil. a. Check for leaks. Repair any found.
Replenish hydraulic oil to proper level.
b. Low engine rpm. b. Increase engine rpm to recommended
setting.
c. Main relief valve damaged. c. Replace relief valve.
d. Air in cylinder rod. d. Bleed cylinder rod.
e. Bent boom pivot shaft. e. Replace pivot shaft.
2. Boom lowers
erratically.
a. Low hydraulic oil. a. Check for leaks. Repair any found.
Replenish hydraulic oil to proper level.
b. Low engine rpm. b. Increase engine rpm to recommended
level.
c. Circuit and/or relief valve inoperative. c. Repair or replace relief valve.
d. Air in hydraulic cylinder. d. Bleed air from cylinder.
e. Damaged hydraulic pump section. e. Repair or replace pump section.
3. Boom raises
slowly.
a. Low hydraulic oil level. a. Check for leaks. Repair any found.
Replenish hydraulic oil to proper level.
b. Low engine rpm. b. Increase and maintain engine rpm.
c. Damaged relief valve. c. Repair or replace relief valve.
d. Extremely cold hydraulic oil. d. Operate unit to bring oil to operating
temperature.
e. Improper hose or fittings, installed. e. Replace hose or fittings. (Refer to
Grove Parts Manual).
f. Operating two functions within the
same control valve bank assembly.
f. Feather controls to obtain desired
speed of both functions.
g. Restriction in return hose. g. Replace return hose.
h. Cylinder piston seals leaking. h. Replace all cylinder seals.
i. Scored cylinder barrel. i. Hone or replace barrel.
j. Worn hydraulic pump section. j. Repair or replace pump section.
Reference Only

Manitowoc Grove TMS700E Specifications

General

Brand	Manitowoc
Model	Grove TMS700E
Category	Construction Equipment
Language	English