Table 3-1. Operator/Crew Preventive Maintenance Checks and Services

TM 10-3930-632-12

comes from a loose fitting or connector, tighten it. If

something seriously wrong, report it to organizational

something is broken or worn out, report it to

maintenance RIGHT NOW.

organizational maintenance.

When you do your PREVENTIVE

j. It is necessary for you to know how fluid

MAINTENANCE, take along the tools you need to make

leakage affects the status of your equipment. The

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

WARNING

following are definitions of the types/classes of leakage

you need to know to be able to determine the status of

Drycleaning solvent SD-2, used to clean parts,

your equipment. Learn, then be familiar with them and

is potentially dangerous to personnel and

REMEMBER-WHEN IN DOUBT, NOTIFY YOUR

property. Do not use near open flame or

SUPERVISOR! Leakage definitions for Operator/Crew

excessive heat. Flash point of solvent is 138F.

(1) Keep it clean. Dirt, grease, oil, and

PMCS.

CLASS I

Seepage of fluid (as indicated by

debris only get in the way and may cover up a serious

wetness or discoloration) not great

problem. Clean as you work and as needed. Use

enough to form drops.

drycleaning solvent (SD-2) to clean metal surfaces. Use

CLASS II

Leakage of fluid great enough to

soap and water when you clean rubber or plastic

form drops but not enough to

material.

(2) Bolts, nuts, and screws. Check them

cause drops to drip from item

being checked/inspected.

all for obvious looseness, missing, bent, or broken

CLASS III Leakage of fluid great enough to

condition. You can't try them all with a tool, of course.

form drops that drip from the item

But look for chipped paint, bare metal, or rust around

being checked/inspected.

bolt heads. If you find one you think is loose, tighten it

CAUTION

or report it to organizational maintenance.

(3) Welds. Look for loose or chipped

Equipment operation is allowable with minor

leakage (Class I or II). Of course, consideration

paint, rust, or gaps where parts are welded together. If

must be given to the fluid capacity in the

you find a bad weld, report it to organizational

item/system being checked/inspected. When in

maintenance.

(4) Electric wires and connectors. Look for

doubt, notify your supervisor.

When operating with Class I or II leaks, continue

cracked or broken insulation, bare wires, and loose or

to check fluid levels as required in your PMCS.

broken connectors. Tighten loose connectors and make

Class III leaks should be reported to your

sure the wires are in good shape.

(5) Hoses and fluid lines. Look for wear,

supervisor or to organizational maintenance.

damage, and leaks, and make sure clamps and fittings

are tight. Wet spots show leaks, of course, but a stain

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

Table 3-1. Operator/Crew Preventive Maintenance Checks and Services

B-Before

D-During

A-After

W-Weekly

M-Monthly

ITEM

Interval

ITEM TO BE INSPECTED

Equipment is not ready/,

NO.

PROCEDURE: Check for and have repaired, filled or adjusted

AVAILABLE IF:

as needed.

IMPORTANT: PERFORM WEEKLY AS WELL AS BEFORE

OPERA TIONS PMCS IF:

1. YOU ARE THE ASSIGNED OPERATOR AND HAVE NOT

OPERATED THE ITEM SINCE THE LAST WEEKLY.

2. YOU ARE OPERATING THE ITEM FOR THE FIRST TIME.

EXTERIOR OF VEHICLE

A. Check for leaks or appearance of leaks.

Class III leaks or any fuel leaks.

Obvious cracks in welds.

B. Visually check overhead guard for obvious cracks in welds.

AIR CLEANER

Check and clean air cleaner element as necessary.

Have Organizational Maintenance replace as necessary.

ENGINE OIL LEVEL (fig. 3-1)

Check oil dipstick, add oil, if needed, to raise level to the full (F)

mark.

Change 1 3-2