Manitowoc Grove TMS700E Service And Maintenance Manual page 316

UNDERCARRIAGE
Symptom
2. Sticking spool.
3. External leakage.
4. Solenoid failure.
5. Outrigger vertical
cylinder slow or erratic.
8-64
Probable Cause
a. Dirt in the system.
b. Distortion caused by tie bolts
being overtorqued.
c. Flow in excess of valve rating.
d. Pressure in excess of valve
rating.
e. Electrical failure.
a. Damaged O-ring or quad
rings.
b. Loose tie bolts.
c. Damaged solenoid.
a. No current.
b. Damaged solenoid assembly.
c. Short in solenoid.
d. Loss of solenoid force.
jack a. Low in hydraulic oil.
b. Damaged main relief valve.
c. Damaged holding valve seals.
d. Bent cylinder rod.
e. Bent outrigger housing.
f. Damaged O-rings in swivel.
g. Excessive material on beams.
h. Sticking solenoid valve spool.
i. Damaged wiring to solenoid.
j. Weak brush
collector rings.
k. Collector ring dirty or glazed.
l. Directional
sticking.
m. Main hydraulic
cavitation.
n. Worn or damaged hydraulic
pump section.
Published 01-29-2015, Control # 512-01
TMS700E SERVICE MANUAL
a.
b. Retorque tie bolts.
c.
d. Check relief valve setting or pump
e.
a.
b. Retorque tie bolts.
c.
a.
b. Replace solenoid.
c.
d. Decrease
a.
b. Repair or replace valve.
c.
d. Replace cylinder rod and seals.
e.
f.
g. Clean outrigger beams.
h. Repair or replace valve spool.
i.
springs on j.
k.
selector switch l.
pump m. Replace or tighten hose and
n. Repair or replace pump section.
Solution
Change oil and flush system.
Limit flow through valve to that
recommended. Check pump output
and cylinder ratio.
c o m p e n s a t i o n w i t h
recommended.
Check wiring and solenoids.
Check for chipped packings and
replace.
Replace damaged parts.
Check power source of at least
85% of coil rating.
Replace coil.
time of
energization, decrease cycle rate.
Check for leaks. Repair any found.
Add hydraulic oil to proper level.
Replace holding valve seals.
Repair or replace
housing.
Replace O-rings.
Repair or replace wiring.
Replace brush springs.
Clean or deglaze collector ring.
Clean or replace switch.
fittings.
t h a t
solenoid
outrigger