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 - Page 207 of 704

0019-27

Change 1

TB 9-3950-253-13&P

0019

ELECTRICAL SYSTEM – CONTINUED

28. NO HOOK LIFT FUNCTIONS (ERROR CODE D2).

Step 1.

Check two rear twistlocks and two transport twistlocks for correct stowed position (WP 0005).

Correctly stow all twistlocks (WP 0005).

Step 2.

Check all four twistlock sensors for damage, loose connection or damaged wiring harness.

a.

Tighten or repair sensor mounting or connection.

b.

Replace sensor or harness if damaged.

Step 3.

Calibrate twistlock sensors (WP 0034).

Step 4.

Set battery disconnect switch and ignition switch to ON position (PLS: TM 9-2320-364-14&P,

HEMTT: TM 9-2320-326-14&P).

If any twistlock sensor LED does not illuminate when twistlock is correctly stowed, replace twist-

lock sensor (WP 0034).

HYDRAULIC SYSTEM

NOTE

•

Tag all wires, connections, hoses, and fittings upon removal.

•

Install all wires, connections, hoses, and fittings as tagged during removal.

NO RETRIEVE OR STOW FUNCTION.

Step 1.

Verify correct operation of vehicle LHS (PLS: TM 9-230-364-14&P, HEMTT: TM 9-2320-326-

14&P).

a.

If vehicle LHS does not operate correctly, refer to vehicle TM (PLS: TM 9-2320-364-14&P,

HEMTT: TM 9-2320-326-14&P).

c.

If vehicle LHS operates correctly, return hook arm to home position and proceed to next

step.

Step 2.

Verify correct installation of hydraulic hoses (WP 0050

HEMTT/PLS: Stowage Assembly Instal-

lation

).

Install pressure hose on pressure T fitting and relief hose on relief T fitting.

Step 3.

Check hydraulic hoses for damage, loose or damaged fittings (WP 0043).

Replace damaged hoses or fittings (WP 0043).

Step 4.

Check stowage cylinder for damage, damaged or bent casing, damaged or bent cylinder rod.

Replace stowage cylinder if damaged or bent (WP 0023).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

0.