TM 9-2320-269-10
TROUBLESHOOTING TABLE - CONTINUED
DERRICK - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
Continued operation of vehicle and/or equipment having following type malfunctions can cause personnel injury.
Derrick leg cannot be lowered.
NOTE
The emergency power system should only be used to bring the derrick leg down, put it in stowed position and
raise the outriggers, in the event the engine stalls and will not re-start. Notify organizational maintenance.
Derrick cannot be rotated.
Step 1.
Check if payload exceeds chart capacity ratings.
Step 2.
Check if vehicle is in level position.
Notify organizational maintenance.
Derrick leg hydraulic extension will not extend or retract.
Notify organizational maintenance.
If you have any of the following additional hydraulic system malfunctions, notify organizational maintenance.
Derrick moves slow, erratic
Derrick leg will not hold, drifts down
Derrick operation, spongy
Outriggers will not hold in down position
Derrick pump not operating properly
Derrick pump very noisy
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