TM 5-3810-307-24-1-1
Direct/General Support Troubleshooting - Continued
SYMPTOM
PROBABLE CAUSE
CORRECTIVE ACTION
4. Swing operation slow in
f. Worn or damaged pump
f. Repair or replace damaged
either direction
section.
pump section.
(continued).
g. Improper size hoses and/or
g. Check hoses and fittings and
fittings installed.
replace as necessary.
5. Swing brake operation
a. Brake improperly adjusted.
a. Adjust brake.
erratic.
b. Dirty or glazed brake pad
b. Clean or replace linings.
linings.
6. Swing brake system will
Internal damage to swing brake
Repair or replace damaged parts.
not operate.
assembly.
7. Swing motor continues to
Control valve spool sticking or
Repair or replace valve.
operate when swing
valve damaged.
control is in neutral
position.
8. Swing motor noisy.
Motor defective.
Repair or replace motor.
TELESCOPE SYSTEM
1. Boom extends erratically.
a. Damaged relief valve(s).
a. Repair or replace damaged
relief valve(s).
b. Distorted boom section.
b. Replace distorted boom
section.
c. Damaged telescope
cylinder.
c. Repair or replace cylinder.
d. Damaged control valve.
d. Repair or replace control valve.
2. Boom retracts erratically.
a. Damaged relief valve(s).
a. Repair or replace damaged
relief valve(s).
b. Check valve malfunctioning.
b. Repair or replace check valve.
c. Bent cylinder rod.
c. Replace cylinder rod and all
cylinder seals.
d. Scored cylinder barrel.
d. Repair or replace cylinder
barrel.
e. Damaged piston seals.
e. Replace all cylinder seals
f. Loose or damaged piston.
f. Replace all seals and retorque
or replace piston.
g. Distorted boom section.
g. Replace distorted boom
section.
1-5-21
