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TM 5-4320-304-14
TM 08922A-14/1
2-8. OPERATION IN HIGH ALTITUDES
The operating efficiency of the engine diminishes at higher altitudes. Be sure that engine is operating
at peak efficiency.
2-9. OPERATION IN SANDY OR DUSTY AREAS
Monitor air cleaner intake restriction indicator more
closely in sandy or dusty locations. At first sign of restric-
tion, change air filter.
a. If red band appears in window of air cleaner restriction indicator and rain hood is not blocked
and no damage to system components is found, replace air filter. Refer to paragraph 3-4.
b. With engine stopped, inspect frequently to be sure that cylinder cooling fins are clean and free
of dirt that inhibits cooling.
c. With engine stopped, inspect frequently to be sure that blower ring is clean and free of dirt.
d. With engine stopped, inspect frequently to be sure that engine oil is to top mark on dipstick.
Add oil, if necessary, to bring level up to top mark.
e. During fueling and PMCS, be sure that sand or dust is not allowed to enter fuel or lubrication
system.
f. If centrifugal pump unit is not in use and suction and/or discharge hoses are not installed, be
sure that suction (intake) flange and discharge ports are covered.
g. Be sure that frequency of PMCS is increased in accordance with local conditions and
requirements.
2-33
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