TM 9-2320-260-10
3-6. GENERAL LUBRICATING INSTRUCTIONS UNDER
UNUSUAL CONDITIONS
a. Service Intervals. Increase frequency of lubricating service when operating under
abnormal conditions such as high or low temperatures, prolonged high-speed driving, or
extended cross-country operations. Such operations can destroy a lubricant’s protective
qualities. More frequent lubricating service intervals are necessary to maintain vehicle
readiness when operating under abnormal conditions. During inactive periods, service
intervals can be extended with adequate preservation.
b. Changing Lubricant Grade. Lubricant grades change with weather conditions.
Refer to LO 9-2320-260-12 for lubricant grade changes for the following temperature
ranges:
(1) +15° F (-9°C) and above.
(2) +40° F to -15° F (+4°C to -26°C)
(3) +40° F to -65° F (+4°C to -54°C)
c. Maintaining Lubricant Levels. Lubricant levels must be checked as specified in
LO 9-2320-260-12. Steps must be taken to replenish and maintain operating levels.
3-7. LUBRICATION FOR CONTINUED OPERATION BELOW
0°F (-17°C)
See FM 9-207, Operation and Maintenance of Ordinance Materiel in Cold Weather
0°F to -65° F (-17° C to -54° C).
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