8-24 Published 11-22-2016, Control # 345-12
UNDERCARRIAGE RT9130E-2 SERVICE MANUAL
Maintenance
Table 8-4
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. Check system for leaks. Make
repairs as needed. Fill
reservoir. Refer to Lubrication,
page 9-1.
c. Sticking solenoid valve spool. c. Repair or replace valve spool.
d. Improper ground to base of
solenoid.
d. Ground properly.
e. Directional selector switch
sticking.
e. Clean or replace switch.
f. Collector ring dirty or glazed. f. Clean and deglaze collector
ring.
g. Damaged wiring to solenoid. g. Replace wiring.
h. Weak brush springs on
collector ring.
h. Replace brush springs. Refer
to your Manitowoc Crane
Care Parts Manual.
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