Table 4-1. Unit Preventive Maintenance Checks and Services (Cont).
H-Hours of operation
Item to be Inspected
Air Hoses, Reservoir and
Inspect for dents, cracks, loose
connections, and leaks. Test for leaks by
stopping towing vehicle's engine when air
pressure is at a maximum and
observing gauge. There should be no
drop in the air pressure gauge within one
Brake Master Cylinder
Check fluid level. Fill to ½ inch from top.
Lubricate hinge block pivot pins and
Power Distribution Unit
Lubricate cover hinge.
Perform road test paying special attention
to items that were repaired or adjusted, in
accordance with TM 9-2330-247-14&P.
Section VI. TROUBLESHOOTING
4-13. Power Unit Troubleshooting . Table 4-2 contains troubleshooting information for locating and
correcting operating troubles which may develop in components unique to the power unit end item. Each
malfunction is followed by a list of tests or inspections which will help determine probable cause and corrective
actions to take. Perform the tests/inspections and corrective actions in the order listed. This manual cannot list
all malfunctions that may occur, nor all tests or inspections or corrective actions. If a malfunction is not listed
or cannot be corrected by listed corrective actions, notify your supervisor. Refer to TM 5-6115-465-12 for
troubleshooting procedures applicable to the generator set. Refer to TM 9-2330-247-14&P for troubleshooting
procedures applicable to the trailer.
Make sure generator sets are shut down before performing voltage tests. Failure
to observe this precaution can result in serious injury or death by electrocution.
Some of the tests in table 4-2 require the use of a power source jumper cable.
Refer to Appendix D, Section III for jumper cable fabrication data before
When performing voltage tests, refer to the schematic diagram located on the
inside of the power distribution unit cover.