TM-9-2510-247-13-P

FIFTH WHEEL TOWING DEVICE MODEL 250M

TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT MAINTENANCE MANUAL, REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2004

TM-9-2510-247-13-P - Page 135 of 522

TM 9-2510-247-13&P

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UNIT TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

KINGPIN

KINGPIN FAILS TO LOCK IN FIFTH WHEEL

Step 1.

Is proper kingpin (2 inches or 3 1/2 inches) installed in Fifth Wheel Towing

Device?

If no, install proper kingpin size for compatibility to prime mover (WP 0034).

If yes, go to step 2.

Step 2.

Is kingpin bolster plate resting on the prime mover’s fifth wheel and parallel with the

prime movers chassis while coupling?

If no, adjust position of kingpin bolster plate (WP 0006).

If yes, go to step 3.

Step 3.

Is fifth wheel lockout device on prime mover open before coupling?

If no, refer to prime mover TM to open lockout device.

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END OF WORK PACKAGE

If yes, refer to prime mover TM to determine fault.