TB-9-3950-253-13-P

PALLETIZED LOAD SYSTEM TRUCK, M1075 and M1075A1 (PLS) AND HEAVY EXPANDED MOBILITY TACTICAL TRUCK, M1120, M1120A2, AND M1120A4 (HEMTT), ENHANCED CONTAINER HANDLING UNIT (E-CHU)

TECHNICAL BULLETIN; OPERATOR AND FIELD MAINTENANCE, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2009
TB-9-3950-253-13-P

  TB-9-3950-253-13-P - Page 132 of 704

0014-6
TB 9-3950-253-13&P
0014
CONTROL PANEL – CONTINUED
6. JOYSTICK UNLOAD POSITION IS INOPERATIVE WITH CONTAINER LOADED.
Step 1.
Verify that hydraulic oil level is within normal range (PLS: TM 9-2320-364-14&P, HEMTT: TM 9-
2320-326-14&P).
Add hydraulic oil to normal operating level (PLS: TM 9-2320-364-14&P, HEMTT: TM 9-2320-
326-14&P).
Step 2.
Verify that engine is started and running at idle speed (PLS: TM 9-2320-364-14&P, HEMTT: TM
9-2320-326-14&P).
Start engine and run at idle speed (PLS: TM 9-2320-364-14&P, HEMTT: TM 9-2320-326-14&P).
Step 3.
Verify that MODE switch is set to AUTO position (PLS: TM 9-2320-364-14&P, HEMTT: TM 9-
2320-326-14&P).
Set MODE switch to AUTO position (PLS: TM 9-2320-364-14&P, HEMTT: TM 9-2320-326-
14&P).
Step 4.
Verify that stowage control panel AUTO/OFF/MAN switch is set to AUTO position (WP 0004)
Set stowage control panel AUTO/OFF/MAN switch to AUTO position (WP 0004).
Step 5.
HEMTT only: verify that PTO switch is set to ON position (TM 9-2320-326-14&P).
Set PTO switch to ON position (TM 9-2320-326-14&P).
Step 6.
Verify that transport locks are in stowed position (WP 0008) and sensor lights are on.
Stow transport locks (WP 0008).
Step 7.
Verify that rear twistlocks are in stowed position (WP 0008) and sensor lights are on.
Stow rear twistlocks (WP 0008).
Step 8.
Verify that lift frame is in stowed or retrieved position (WP 0008) and both guide sensor lights
are on.
Step 9.
If joystick UNLOAD position is still inoperative, notify Field Maintenance.
7. LIFT FRAME LOCKING PLATE WILL NOT ENGAGE INTO CONTAINER LOWER CASTINGS.
Step 1.
Inspect for mud and debris in and around both container lower castings.
Clean mud and debris from container lower castings.
Step 2.
Inspect for mud and debris in and around both lift frame lower locking plates.
Clean mud and debris from lift frame lower locking plates.
Step 3.
Inspect both locking plates for damage.
If one or both locking plates are damaged or bent, notify Field Maintenance.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
0.


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