TM 5-3810-307-24-1-1
Direct/General Support Troubleshooting - Continued
SYMPTOM
PROBABLE CAUSE
CORRECTIVE ACTION
5. Boom will not raise
c. Worn or damaged hydraulic
c. Repair or replace pump section.
(continued).
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.
6. Boom will not lower.
a. Main and/or circuit relief
a. Repair or replace relief valve.
valve damaged.
b. Improperly adjusted control
b. Adjust linkage to obtain full
valve linkage.
valve spool travel.
c. Worn or damaged hydraulic
c. Repair or replace pump section.
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.
OUTRIGGER CIRCUIT
1. Outrigger extension
a. Damaged relief valves.
a. Remove relief valve and clean
cylinder operation slow or
or replace.
erratic.
b. Solenoid valve spool
b. Repair or replace spool valve.
sticking.
c. Swivel o-rings damaged.
c. Remove swivel and replace 0-
rings.
d. Collector ring dirty or glazed.
d. Clean or deglaze collector ring.
e. Weak brush springs on
e. Replace brush springs.
collector switch.
f. Extension cylinder damaged
f. Remove extension cylinder and
internally.
repair as necessary.
g. Bent cylinder rod.
g. Replace piston rod and seals.
h. Binding outrigger beam.
h. Repair or replace outrigger
beam.
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