Section Il. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

TM 10-3930-638-10

Section Il. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

Clean as you work and as needed. Use dry cleaning

2-6. MAINTENANCE FORMS AND

solvent (P-D-680) on all metal surfaces. Use soap and

RECORDS

water when you clean rubber or plastic material.

Every mission begins and ends with the paperwork. There

(2) Bolts, nuts and screws: Check them all for

isn't much of it, but you have to keep it up. The forms

obvious looseness, missing, bent or broken condition.

and records you fill out have several uses. They are a

You can't try them all with a tool, of course, but look for

permanent record of the services, repairs and modifications

chipped paint, bare metal or rust around bolt heads. If

made on your vehicle. They are reports to organizational

you find one you think is loose, tighten it, or report it to

maintenance and to your Commander. And they are a

organizational maintenance if you can't tighten it.

checklist for you when you want to know what is wrong

(3) Welds: Look for loose or chipped paint, rust or

with the vehicle after its last use, and whether those

gaps where parts are welded together. If you find a bad

faults have been fixed. For the information you need on

weld, report it to organizational maintenance.

forms and records, see DA Pam 738-750.

(4) Electric wires and connectors: Look for

2-7. PREVENTIVE MAINTENANCE

cracked or broken insulation, bare wires and loose or

CHECKS AND SERVICES

broken connectors. Tighten loose connectors and make

sure the wires are in good shape.

a. Do your before(B) PREVENTIVE MAINTENANCE

just before you operate the vehicle. Pay attention to the

(5) Hoses and fluid lines: Look for wear, damage

CAUTIONS and WARNINGS.

and leaks, and make sure clamps and fittings are tight.

Wet spots show leaks, of course, but a stain around a

b. DURING checks and services(D) of PREVENTIVE

fitting or connector can mean a leak. If a leak comes

MAINTENANCE will be performed while the equipment

from a loose fitting or connector, tighten it. If some-

and/or its component systems are in operation.

thing is broken or worn out, report it to organizational

c. Do your after (A) PREVENTIVE MAINTENANCE

maintenance.

right after operating the vehicle. Pay attention to the

j. It is necessary for you to know how fluid leakage

CAUTIONS and WARNINGS.

affects the status of your vehicle. The following are

d. Do your weekly (W) PREVENTIVE

definitions of the types/classes of leakage you need to

MAINTENANCE weekly.

know to be able to determine the status of your vehicle.

Learn, then be familiar with them and REMEMBER-

e. Do your monthly (M) PREVENTIVE

WHEN IN DOUBT, NOTIFY YOUR SUPERVISOR!

MAINTENANCE once a month.

Leakage Definitions for Crew/Operator PMCS

f. If something doesn't work. troubleshoot it with

the instructions in this manual or notify your supervisor.

Class I Seepage of fluid (as indicated by wetness or

discoloration) not great enough to form drops.

g. Always do your PREVENTIVE MAINTENANCE

in the same order so it gets to be a habit. Once you've

Class II Leakage of fluid great enough to form drops

had some practice, you'll spot anything wrong in a hurry.

but not enough to cause drops to drip from

item being checked/inspected.

h. If anything looks wrong and you can't fix it, write

it on your DA Form 2404. If you find something

Class III Leakage of fluid great enough to form drops

seriously wrong. report it to organizational maintenance

that fall from the item being checked, inspected.

RIGHT NOW.

CAUTION

i. When you do your PREVENTIVE

EQUIPMENT OPERATION IS ALLOWABLE

MAINTENANCE, take along the tools you need to make

WITH MINOR LEAKAGES (CLASS I OR II).

all the checks. You always need a rag or two.

OF COURSE, CONSIDERATION MUST BE

WARNING

GIVEN TO THE FLUID CAPACITY IN THE

lTEM/SYSTEM BEING CHECKED/

Dry cleaning solvent, used to clean parts is

INSPECTED. WHEN IN DOUBT, NOTIFY

potentially dangerous to personnel and property.

YOUR SUPERVISOR.

Do not use near open flame or excessive heat.

Flash point of solvent is 138 degrees F.

CLASS Ill LEAKS SHOULD BE CORRECTED

IMMEDIATELY OR REPORTED TO YOUR

SUPERVISOR OR ORGANIZATIONAL

(1) Keep it clean: Dirt, grease, oil and debris

MAINTENANCE.

only get in the way and may cover up a serious problem.

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