TM-9-2320-431-10-2

TRUCK, WRECKER, 8X8, M984A1

TECHNICAL MANUAL; OPERATOR'S MANUAL; PART 2 OF 2

JUNE 2009

TM-9-2320-431-10-2 - Page 179 of 712

OPERATOR MAINTENANCE

CRANE WILL NOT OPERATE, OR OPERATES ABNORMALLY

INITIAL SETUP:

Equipment Condition

Engine OFF. (Volume 1, WP 0057)

Equipment Condition - Continued

Parking brakes applied. (Volume 1,

WP 0056)

Wheels chocked. (Volume 1,

WP 0100)

TROUBLESHOOTING PROCEDURE

CRANE WILL NOT OPERATE, OR OPERATES ABNORMALLY

TEST 1 - Is electrical connector on solenoid tight?

NOTE

Common problems that crane operators may see are:

1. Slow or abnormal operation.

2. Crane will not pick up load.

Common causes of problems are:

1. Cold hydraulic oil (slow operation).

2. Low engine speed (slow or abnormal operation).

3. Operating two craning functions at the same time (slow operation).

4. Load too heavy (will not pick up load).

5. Air in cylinder or hoist motor (abnormal operation).

Report all problems to field level maintenance.

1.

Check that electrical connector on solenoid valve is tight. If connector is loose, tighten.

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