This work package contains introductory information on troubleshooting, testing, and repair of the M915A3 Tractor
Truck. Make sure the problems are real. Be sure the electrical power is on when needed. Refer to the preliminary troubleshoot-
ing procedures before you start troubleshooting, and during troubleshooting, when referenced.
PRELIMINARY TROUBLESHOOTING PROCEDURES
Fluid leaks are classified as either Class I, Class II or Class III
Seepage of fluid, as indicated by wetness or discoloration, not great enough to form drops.
Leakage of fluid great enough to form drops, but not enough to cause drops to drip from the item
being checked or observed.
Leakage of fluid great enough to form drops that fall from the item being checked or observed.
Before starting any specific troubleshooting procedures, perform the following:
Visually check for ruptured oil hoses or tubes, and for Class II or Class III leaks.
Check for mechanical jamming or binding caused by rocks or other foreign matter.
Check fluid levels in subject area and service as required (TM 9-2320-302-10 or Unit PMCS).