TM 5-3810-307-24-1-1
Direct/General Support Troubleshooting - Continued
SYMPTOM
PROBABLE CAUSE
CORRECTIVE ACTION
3. Telescope cylinder will
a. Relief valve malfunctioning.
a. Repair or replace relief valve.
not extend.
b. Broken valve linkage.
b. Repair or replace linkage.
c. Broken valve spool.
c. Replace valve.
d. Damaged piston seals.
d. Replace all cylinder seals.
e. Damaged piston.
e. Replace piston and all cylinder
seals.
f. Bent boom section.
f. Replace damaged boom
section.
g. Broken hydraulic pump
g. Replace broken hydraulic pump
coupling.
coupling.
h. Worn or damaged hydraulic
h. Repair or replace pump section.
pump section.
4. Telescope cylinder will
a. Relief valve malfunctioning.
a. Repair or replace relief valve.
not retract.
b. Inoperative check valve.
b. Repair or replace check valve.
c. Broken valve linkage.
c. Repair or replace linkage.
d. Broken valve spool.
d. Replace valve section.
e. Damaged piston seals.
e. Replace all cylinder seals.
f. Damaged piston.
f. Replace piston and all cylinder
seals.
g. Bent boom section.
g. Replace damaged boom
section.
h. Broken hydraulic pump
h. Replace broken hydraulic pump
coupling.
coupling.
i.
Broken hydraulic pump
i.
Replace pump shaft.
shaft.
j.
Worn or damaged hydraulic
j.
Repair or replace pump section.
pump section.
LIFT CIRCUIT
1. Boom raises erratically.
a. Main relief valve damaged.
a. Repair or replace relief valve.
b. Bent boom pivot shaft.
b. Replace pivot shaft.
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