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TM 10-3930-643-20
GENERAL MAINTENANCE PROCEDURES. (cont)
Section IV.
GENERAL REPAIR PRACTICES
2-7. Replacement of Parts.
Only replace unserviceable or discarded parts.
Always discard the following:
cotter pins,
lockwire,
preformed packings,
rubber seals and gaskets.
2-8.
Cleaning, Cleaning is a necessary part of most tasks. Use the following
guidelines when cleaning.
a. Use P-D-680 for cleaning metal parts only.
b .
Use a mild detergent solution for rubber, plastic and nylon parts.
c. Always clean parts before inspecting them.
d.
Dry parts with lint free cloths.
Use compressed air when specified.
e .
Use a wire brush, tap or die to clean rust, accumulated dirt,
sealant
and paint from bolts, screws, nuts and threaded holes.
f .
After cleaning, protect all parts from dust and dirt.
g .
Keep work area floors and workbenches clean and dry.
Clean as you go to
prevent accidents.
h.
Dispose of oily rags in specified containers to prevent fire hazard.
i . K e e p t h e v e h i c l e c l e a n . O i l , g r e a s e a n d d e b r i s m a y h i d e a s e r i o us
problem.
j .
Clean all new parts before installation.
2 - 9 .
Inspection Criteria.
Proper inspection of parts and operating equipment
prevents small problems from becoming major problems. Visually check for any
of the following problems:
broken welds, loose fasteners, damaged threads,
bending, cracking, deformity, nicks, cuts,
s c r a t c h e s , g o u g e s , d i s t o r t i o n,
blockage or inoperability.
Equipment defects can be discovered by performing
PMCS at both crew and organizational levels.
Inspect disassembled, clean parts
for damage listed above.
Check for wear.
Inspect all new parts for defects
b e f o r e i n s t a l l a t i o n .
2 - 1 0 . G e n e r a l R e p a i r P r a c t i c e s . T h e f o l l o w i n g a r e a d d i t i o n a l g e n e r al
p r a c t i c e s t o f o l l o w.
Discard broken and non-reusable parts.
Paint
exposed
metal to protect from rust.
Do not paint electrical harnesses, wiring, hoses
or finished machine parts.
R o u t i n e l y c h e c k h o s e s , l i n e s a n d f i t t i n g s f or
leaks.
Perform all lubrication and PHCS on schedule.
T o p r e v e n t f u r t h er
damage to components, take corrective action promptly when indicated.
Be sure
to follow all warnings, cautions and notes.
Remove burrs, scratches or raised
metal. Use a fine file, stone or crocus cloth dipped in oil.
2-6
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