Maintenance - Manitowoc Grove TMS800E Service And Maintenance Manual

UNDERCARRIAGE

Maintenance

Troubleshooting
Symptom
1. Slow or erratic
outrigger extension cylinders.
8-62
operation of a. Low hydraulic oil level.
b. Damaged relief valve.
c. Sticking solenoid valve spool.
d. Improper ground to base of
solenoid.
e. Damaged O-rings and swivel.
f. Directional
sticking.
g. Collector ring dirty or glazed.
h. Damaged wiring to solenoid.
i. Weak
collector ring.
j. Damaged extension cylinder
(internal parts).
k. Bent cylinder rods.
l. Excessive
outrigger beams.
m. Binding outrigger beam.
n. Damaged outrigger valve.
o. Damaged valve coil.
p. Main
cavitation.
q. Partially
spool in selector valve or
manifolds.
r. Insufficient
operation of solenoid valve.
s. Damaged piston seals.
t. Worn or damaged hydraulic
pump section.
u. Scored cylinder barrel.
Published 01-29-2014, Control # 496-00
Probable Cause
selector switch
brush springs on
material on
hydraulic pump
shifted hydraulic
voltage for
TMS800E SERVICE MANUAL
Solution
a. Check for leaks. Make any
needed repairs. Fill reservoir
to proper level.
b. Remove relief valve; clean or
replace.
c. Repair or replace valve spool.
d. Ground properly.
e. Remove swivel and replace
O-rings.
f. Clean or replace switch.
g. Clean and deglaze collector
ring.
h. Replace wiring.
i. Replace brush springs.
j. Remove extension cylinder
and repair as necessary.
k. Replace piston
seals.
l. Clean outrigger beams.
m. Repair or replace outrigger
beam.
n. Repair or replace valve.
o. Replace coil.
p. Replace or tighten hose or
fitting.
q. Disassemble, clean,
p o l i s h s p o o l a n d v a l v e
housing with very fine emery
cloth (water paper).
r. Solenoids require a minimum
of 9.5 volts to energize. Check
outrigger wiring and electrical
coupling collector rings.
s. Replace all cylinder seals.
t. Repair or replace
section.
u. Repair or replace extension
cylinder.
rods and
and
pump