TM-9-2320-272-10
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; OPERATOR'S MANUAL
SEPTEMBER 2004
CHANGE 2
TM-9-2320-272-10 - Page 127 of 481
TM 9-2320-272-10
2-28
2-6. GENERAL
Preventive Maintenance Checks and Services (PMCS) means systematic caring,
inspecting, and servicing of equipment to keep it in good condition and to prevent
breakdowns. As the vehicle’s operator, your mission is to:
a.
Be sure to perform your PMCS each time you operate the vehicle. Always do
your PMCS in the same order, so it gets to be a habit. Once you’ve had some prac-
tice, you’ll quickly spot anything wrong.
b.
Do your BEFORE checks and service just prior to the start of the mission to
identify faults that will prevent performance of the mission. Pay attention to
WARNINGS, CAUTIONS, and NOTES.
c.
Do your DURING checks and services during the mission to identify faults in
equipment performance. Pay attention to WARNINGS, CAUTIONS, and NOTES.
d.
Do your AFTER checks immediately at the conclusion of the mission. Pay
attention to WARNINGS, CAUTIONS, and NOTES.
NOTE
When a check and service procedure is required for both weekly
and after intervals, it is not necessary to perform the weekly pro-
cedure during the same week in which the before procedure was
done.
e.
Do your WEEKLY checks once a week to identify faults that must be correct-
ed to sustain equipment at fully mission capable standards until next unit mainte-
nance service.
f.
Do your MONTHLY checks for faults that do not need to be checked weekly,
but must be checked more often than at next service by unit maintenance.
g.
Use DA Form 2404 (Equipment Inspection and Maintenance Worksheet) to
record any faults that you discover before, during, or after operation, unless you can
fix them. You DO NOT need to record faults that you fix.
h.
Be prepared to assist unit maintenance when they lubricate the vehicle.
Perform any other services when required by unit maintenance.
i.
A permanent record of the services, repairs, and modifications made to these
vehicles must be recorded. See DA PAM 738-750 for a list of the forms and records
required. Refer to chapter 3, for specific maintenance instructions.
Section II. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
2-5. SPECIAL KITS CONTROLS AND INDICATORS
Controls and indicators which are added as part of a modification kit have been
incorporated into paragraph 2-3 and 2-4. Controls and Indicators which are added
as part of an optional kit can be found in section V.
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