Manitowoc Grove TMS700E User Manual

Grove Published 01-29-2015, Control # 512-01 4-21
TMS700E SERVICE MANUAL BOOM
4
NOTE: Refer to Section 2 for lift cylinder Disassembly and
Assembly procedures. Maintenance not requiring
removal of the cylinder barrels, such as packing,
may be performed without removing the cylinder
from the turntable. However, all disassembly and
assembly should be conducted in a clean dust-free
area.
4. Boom lowers
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 rpm to recommended level.
c. Damaged relief valve. c. Repair or replace relief valve.
d. Operating two functions within the
same control valve bank assembly.
d. Feather controls to obtain desired
speed of both functions.
e. Extremely cold hydraulic oil. e. Operate unit to bring oil to operating
temperature.
f. Improper hose or fittings installed. f. Replace hose or fittings. (Refer to
Grove Manitowoc Parts Manual).
g. Restriction in return hose. g. Replace return hose.
h. Cylinder piston seals worn. 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.
k. Piston rod broken (loose from piston). k. Replace piston rod and all cylinder
seals.
5. Boom will not raise. a. Low hydraulic oil. a. Check for leaks. Repair any found.
Replenish hydraulic oil to proper level.
b. Main relief valve or circuit relief valve
damaged.
b. Repair or replace relief valve.
c. Excessive load. c. Reduce load as required.
d. Worn or damaged hydraulic pump
section.
d. Repair or replace pump section.
e. Broken pump shaft. e. Replace pump shaft and seals.
f. Broken pump drive coupling. f. Replace drive coupling.
g. Broken control valve spool. g. Replace control valve.
6. Boom will not
lower.
a. Low hydraulic oil. a. Check for leaks. Repair any found.
Replenish hydraulic oil to proper level.
b. Main relief valve or circuit relief valve
da
maged.
b. Rep
air or replace relief valve.
c. Worn or damaged hydraulic pump
section.
c. Repair or replace pump section.
d. Broken pump shaft. d. Replace pump shaft and seals.
e. Broken pump drive coupling. e. Replace drive coupling.
f. Broken control valve spool. f. Replace control valve.
Symptom Probable Cause Solution
Reference Only

Manitowoc Grove TMS700E Specifications

General

Brand	Manitowoc
Model	Grove TMS700E
Category	Construction Equipment
Language	English