MAINTENANCE UNDER UNUSUAL CONDITIONS
E x t r e m e Hot Weather Maintenance . . . . . . .
M a i n t e n a n c e After Fording . . . . . . . . . . . . .
M a i n t e n a n c e After Operation on Unusual
E X T R E M E COLD WEATHER MAINTENANCE
a. T h e i m p o r t a n c e o f m a i n t e n a n c e m u s t b e i m p r e s s e d o n a l l c o n c e r n e d .
Maintenance of mechanical equipment in extreme cold is exceptionally difficult in
t h e f i e l d . E v e n shop maintenance cannot be completed with normal speed because
e q u i p m e n t must be allowed to thaw out and warm up before the mechanic can make
I n the field, maintenance must be undertaken under the most
d i f f i c u l t o f c o n d i t i o n s . Bare hands stick to cold metal. Fuel in contact with the
hands results in supercooling due to evaporation, and hands can be painfully frozen
i n a matter of minutes. E n g i n e o i l s , e x c e p t s u b z e r o g r a d e , a r e u n p o u r a b l e a t
temperatures below -400 F. Ordinary greases become as solid as cold butter.
b. T h e s e d i f f i c u l t i e s i n c r e a s e t i m e r e q u i r e d t o p e r f o r m m a i n t e n a n c e . A t
temperatures below -40 F. maintenance requires up to five times the normal amount
of time. Complete winterization, diligent maintenance, and well-trained crews are
the key to efficient Arctic winter operation.
I t is imperative that approved maintenance procedures
b e f o l l o w e d . F M 9-207 contains general information
which is specifically applicable to this materiel as
w e l l a s a l l o t h e r m a t e r i e l . I t must be considered an
essential part of this technical manual, not merely an
explanatory supplement to it.
c. R e f e r to FM 9-207 for general information on extreme cold weather maintenance
EXTREME HOT WEATHER MAINTENANCE
a. C o r r o s i o n .
In hot, damp climates, corrosive action will occur on all parts
of the materiel and will be accelerated during rainy seasons. Evidence will appear
i n t h e f o r m o f r u s t , p a i n t b l i s t e r s , m i l d e w , mold and fungus growth.
b. P r o t e c t i v e A c t i o n . R e m o v e the corrosion from exterior metal surfaces with
abrasive paper or cloth and apply a protective coating of paint, or touch up
existing paint. Keep a film of preservative oil on unfinished exposed metal
Cables and terminals should be protected by spraying with ignition