ARMY TM 9-6115-639-13
AIR FORCE TO 35C2-3-386-51
MARINE CORPS TM 10155A-13/1
Section II. OPERATOR PREVENTIVE MAINTENANCE CHECKS
AND SERVICES (PMCS)
Operator 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 generator set operator,
your mission is to ensure that the generator set is ready for operation at all times. It must be inspected so that
defects can be discovered and corrected before they result in damage or failure.
a. Be sure to perform your PMCS as indicated. Always do your PMCS in the same order, so it gets to
be a habit. Once you have had some practice, you will quickly spot anything wrong.
b. Do your BEFORE (B) PMCS before you operate the generator set. Pay attention to WARNINGS,
CAUTIONS, and NOTES.
c. Do your DURING PMCS while you operate the generator set. Monitor the generator set and its
related components while it is actually being operated. Pay attention to WARNINGS, CAUTIONS, and
d. Do your AFTER PMCS right after operating the generator set. Pay attention to WARNINGS,
CAUTIONS, and NOTES.
e. Do your WEEKLY PMCS once a week.
f. If your equipment does not perform as required, refer to Chapter 3, under Troubleshooting, for
possible problems. Use DA Form 2404 (Equipment Inspection and Maintenance Worksheet) to record any
faults you discover before, during, or after operation.
g. Be prepared to assist unit maintenance when they lubricate the generator set. Perform any other
services when required by unit maintenance.
2-3. PMCS PROCEDURES.
a. Your Preventive Maintenance Checks and Services, Table 2-1, lists inspections and care required to
keep your generator set in good operating condition. It is set up so you can make your BEFORE (B)
OPERATION checks as you walk around the generator set.
b. Item No. Column. The Item No. column in Table 2-1 lists each check / service in chronological
c. Interval Column. The Interval column tells you when to do a certain check or service. Intervals are
based on operating hours, unless otherwise noted.
d. Location Column. The Location: Item to Check / Service column directs maintenance personnel to
the general area on the generator set where the check or service is to be performed.