TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0004 00 0004 00-1/2 blank FIELD TROUBLESHOOTING 2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL) INTRODUCTION TO TROUBLESHOOTING WARNING Failure to perform a preliminary inspection on a deadlined vehicle may cause injury to personnel and/or damage to equipment. NOTE If corrective action provided does not correct malfunction, notify your supervisor. This chapter provides troubleshooting procedures necessary to diagnose mechanical, compressed air and brake system, electrical, and Simplified Test Equipment for Internal Combustion Engines Reprogrammable (STE/ICE-R) malfunctions for M44A2 series vehicles. The troubleshooting procedures may not correct all vehicle malfunctions encountered. However, the procedures provide a step-by-step approach that directs tests and inspections toward the source of a problem. The troubleshooting indexes have their own WP numbers and are used to identify malfunctions and locate the troubleshooting procedure needed to diagnose the problem. Each troubleshooting procedure lists a description of the malfunction followed by a step or sequence of steps to check the operation of a component. Then, in the order of probability, substeps instruct the user to perform a check, inspection, or test to determine if a condition exists. Each substep includes the corrective action required to correct the malfunction. Prior to performing any troubleshooting procedure, observe the following recommendations: 1. Check the Equipment Inspection and Maintenance Worksheet, DA Form 2404, and Maintenance Request Form, DA Form 2407, to find out why the equipment has been deadlined. Note the operator’s written description of the problem and, whenever possible, discuss the problem with the operator. This can save time and effort in diagnosing the problem. 2. Do not assume the operator’s diagnosis is correct, even if it sounds accurate. Always perform the appropriate troubleshooting procedure(s) to verify the cause of the problem. Performing a corrective action without proof of a fault wastes time and increases maintenance of the equipment. 3. First isolate the system where the malfunction occurs, then locate the component and perform the corrective action in the ordered listed. 4. Use approved mechanical, electrical, and pneumatic system repair practices provided in the technical manuals, field manuals, and technical bulletins listed in WP 0465 00 of this manual. 5. Use approved special tools and test equipment to determine the known parameters for isolating a fault. 6. Fill out an Exchange Tag, DA Form 2402, and attach it to component that will be exchanged as a core and turned in for repair or rebuilding at the field or sustainment maintenance level. This manual lists the most common malfunctions that may occur. If a malfunction occurs that is not listed in the Mechanical Systems Troubleshooting Index, WP 0005 00, the Compressed Air and Brake System Troubleshooting Index, WP 0009 00, or the Electrical System Troubleshooting Index, WP 0011 00, notify your supervisor. END OF WORK PACKAGE