TM 9-2320-273-20
Section Ill. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
3-7. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INTRODUCTION. This section
contains Unit PMCS requirements for the M915 vehicle. The PMCS tables contain checks and services nec-
essary to ensure the vehicle is ready for operation. Using the PMCS tables, perform maintenance at the speci-
fied intervals. Preventive Maintenance Checks and Services in TM 9-2320-273-10 must be completed before
doing Unit preventive maintenance.
3-8. MAINTENANCE FORMS AND RECORDS. Every mission begins and ends with paperwork. There is
not much of it, but it must be kept up. The filled out forms and records have several uses. They area record of
the services, repairs, and modifications made on the vehicle; they are reports to unit maintenance and to the
Commander; and they serve as a checklist to find out what is wrong with the vehicle after its last use, and
whether those faults have been fixed. For information needed on forms and records, see DA PAM 738-750.
3-9. GENERAL MAINTENANCE PROCEDURES.
WARNING
Adhesives, solvents, and sealing compounds can burn easily, can give off harmful vapors,
and are harmful to skin and clothing. To avoid injury or death, keep away from fire and use in
well-ventilated area. If adhesive, solvents, or sealing compound get on skin or clothing, wash
immediately with soap and water.
a. CLEANLINESS. Dirt, grease, oil and debris only get in the way and may cover up a serious problem. Use
dry cleaning solvent on metal surfaces and soapy water on rubber.
b. BOLTS, NUTS, AND SCREWS. Check bolts, nuts, and screws for obvious looseness, missing, bent, or
broken condition and tighten or replace as necessary. They cannot all be checked with a tool, of course, but
look for chipped paint, bare metal, or rust around bolt heads.
c. WELDS. Look for loose or chipped paint, rust, or gaps where parts are welded together. If a bad weld is
found, have it repaired.
d. ELECTRIC WIRES AND CONNECTORS. Look for cracked or broken insulation, bare wires, and loose or
broken connectors. Tighten loose connectors and make sure the wires are in good shape.
e. HYDRAULIC LINES AND FlTTINGS. Look for wear, damage, leaks, and make sure clamps and fittings
are tight. Wet spots show leaks, of course, but a stain around a fitting or connector may indicate a leak. If a
connector or fitting is loose, tighten it. If something is broken or worn out, repair or replace per applicable pro-
cedure.
3-10. FLUID LEAKAGE. It is necessary to know how fluid leakage affects the status of fuel, oil, coolant, and
the hydraulic systems. The following are definitions of types/classes of leakage necessary to know in order to
determine the status of the vehicle.
CAUTION
Equipment operation is allowable with minor leakages (Class I or II). Of course, considera-
tion must be given to the field capacity in the item/system being checked/inspected. When in
doubt, notify the supervisor. When operating with Class I or II leaks, continue to check fluid
levels as required in the PMCS. Class Ill leaks should be repaired per applicable procedure.
a. Class 1. Seepage or fluid as indicated by wetness or discoloration not great enough to form drops.
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