UNDERCARRIAGE RT540E SERVICE MANUAL
8-28 Published 4-20-2015, Control # 502-01
Maintenance
Troubleshooting
Symptom Probable Cause Solution
1. Slow or erratic operation of
outrigger extension cylinders.
a. Damaged relief valve. a. Remove relief valve; clean or
replace.
b. Low hydraulic oil. b. Replenish oil to proper level.
Refer to LUBRICATION (pg 9-
1)
c. Sticking solenoid valve spool. c. Repair or replace valve spool.
d. Improper ground to base of
solenoid.
d. Ground properly.
e. Damaged O-rings and swivel e. Remove swivel and replace
O-rings.
f. Directional selector switch
sticking.
f. Clean or replace switch.
g. Collector ring dirty or glazed. g. Clean and deglaze collector
ring.
h. Damaged wiring to solenoid. h. Replace wiring.
i. Weak brush springs on
collector ring.
i. Replace brush springs.
j. Damaged extension cylinder
(internal parts).
j. Remove extension cylinder
and repair as necessary.
k. Bent cylinder rods. k. Replace piston rods and
seals.
l. Excessive material on
outrigger beams.
l. Clean outrigger beams.
m. Binding outrigger beam. m. Repair or replace outrigger
beam.
n. Damaged outrigger valve. n. Repair or replace valve.
o. Damaged valve coil. o. Replace coil.
p. Main hydraulic pump
cavitation.
p. Replace or tighten hose or
fitting.
Reference Only
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