TM-9-2815-225-34-P
ENGINE, DIESEL: 6 CYLINDER IN-LINE TURBOCHARGED, CUMMINS MODEL NTC-400
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2005
TM-9-2815-225-34-P - Page 50 of 736
TM 9-2815-225-34&P
0005 00
0005 00-2
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INTRODUCTION (Contd)
PMCS GUIDELINES
Before performing preventive maintenance, read all the checks required for the applicable interval and
prepare all the tools you need to make all the checks.
Always perform PMCS in the same order so it becomes a habit. Once you’ve had some practice, you
should be able to spot problems in a hurry. If the vehicle does not perform as required, refer to the
appropriate troubleshooting procedure in WP 0004 00.
If anything looks wrong and you can’t fix it, write it on your DA Form 2404. If you find something
seriously wrong, IMMEDIATELY report it to your supervisor.
Keep It Clean.
Dirt, grease, oil, and debris get in the way and may cover up a serious problem. Clean
as you work and as needed. Use detergent (Item 34, WP 0060 00) and water when you clean metal,
rubber, plastic, and painted surfaces.
Rust and Corrosion.
Inspect metal parts for rust and corrosion. If any bare metal or corrosion exists,
clean and apply a light coat of lubricating oil (Item 16, WP 0060 00) and report it to your supervisor.
Bolts, Nuts, and Screws.
Inspect bolts, nuts, and screws for obvious looseness and missing, bent, or
broken condition. Inspect for chipped paint, bare metal, or rust around bolt heads. If you find one you
think is loose, tighten it.
Welds.
Inspect for loose or chipped paint, rust, or gaps where parts are welded together. If you find a
bad weld, report it to your supervisor.
Electric Wires and Connectors.
Inspect for cracked, chafed, or broken insulation, bare wires, and
loose or broken connectors. Tighten loose connectors and ensure that the wires are in good condition.
Hoses and Fluid Lines.
Inspect for wear, damage, and signs of leaks. Ensure that clamps and fittings
are tight. Wet spots indicate leaks, but a stain around a fitting or connector can also mean a leak. If a
leak comes from a loose fitting or connector, tighten it. If something is broken or worn out, report it to
your supervisor.
Fluid Leakage.
It is necessary for you to know how fluid leakage affects the status of the engine.
Following are types/classes of leakage you need to know to be able to determine the status of your
truck. Learn these leakage definitions and remember: when in doubt, notify your supervisor.
CAUTION
• Equipment operation is allowed with minor leakages (Class I
or II). Consideration must be given to fluid capacity in the
item/system being checked/inspected. When in doubt, notify
your supervisor.
• When operating with Class I or II leaks, continue to check
fluid levels as required in the PMCS.
• Class III leaks should be reported immediately to your
supervisor.
Leakage Definitions for PMCS
Class I
Seepage of fluid (as indicated by wetness or discoloration) not great enough to form
drops.
Class II
Leakage of fluid great enough to form drops, but not enough to cause drops to drip from
item being checked/inspected.
Class III Leakage of fluid great enough to form drops that fall from item being checked/inspected.
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