UNIT MAINTENANCE INSTRUCTIONS
EXTENDED SERVICE PROGRAM (ESP)
TRUCK, CARGO, 2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)
PREVENTIVE MAINTENANCE CHECKS AND SERVICES
The best way to maintain vehicles covered by this manual is to inspect them on a regular basis so minor
faults can be discovered and corrected before they result in serious damage or failure of vehicle and
equipment or injury to personnel. WP 0025 00 contains systematic instructions for inspection, adjustment,
and correction of vehicle components to avoid costly repairs or major breakdowns. This is referred to as
Preventive Maintenance Checks and Services (PMCS).
All uncorrected defects will be recorded on Equipment Inspection and Maintenance Worksheet, DA Form
2404, in accordance with DA Pam 738-750.
GENERAL SERVICE AND INSPECTION PROCEDURES
a. While performing specific PMCS procedures, ensure items are correctly assembled, secure,
serviceable, not worn, not leaking, and adequately lubricated as defined below:
(1) An item is CORRECTLY ASSEMBLED when all parts are present and in proper position.
(2) When wires, nuts, washers, hoses, or attaching hardware cannot be moved by hand, wrench, or
prybar, they are SECURE.
(3) An item is UNSERVICEABLE if it is worn beyond established wear limits or is likely to fail
before the next scheduled inspection.
(4) An item is WORN if there is play between joining parts, or warning and caution plates are not
(5) LEAKS. TM 9-2320-386-10 contains definitions of class I, II, and III leaks and their effect on
(6) If an item meets the requirements specified by the lubrication instructions, WP 0023 00, then it
is ADEQUATELY LUBRICATED.
b. Where the instruction tighten appears in a procedure, you must tighten with a wrench to the given
torque value even when the item appears to be secure.