TM 5-3810-300-24&P-3
15.1 Preventive Maintenance
evident, replace the oil lines and correct the
Under no engine operating conditions should the air inlet
cause.
restriction exceed 25 inches of water for non-
turbocharged engines.
A clogged air cleaner element will cause excessive
intake restriction and a reduced air supply to the engine.
7.
Lubricating Oil
Change the initial lubricating oil at approximately 3,000
miles and at 4,000 to 6,000 mile intervals thereafter. The
drain
interval
may
be
established
on
the
BELT TENSION CHART (lbs/belt)
recommendations of an independent oil analysis
laboratory or the oil supplier (based upon the oil sample
9.
Drive Belts
analysis) until the most practical oil change period has
been determined. Select the proper grade of oil in
New drive belts stretch during the first few hours of
accordance with the instructions given in the Lubricating
operation. Run the engine 15 seconds, to seat the belts,
Oil Specifications in Section 13.3.
and readjust the tension. Then check the belts and
retighten fan drive, pump drive and battery-charging
8.
Lubricating Oil Filters
generator drive belts after 30 miles and again after 240
miles of operation. Thereafter check the tension of the
a. Change the lubricating oil filters when the engine
drive belts at the intervals shown in the chart. Too tight a
oil is changed. Any deviation, such as changing
belt is destructive to the bearings of the driven part, a
filters every other oil change, should be based
loose belt will slip.
on a laboratory analysis of the drained oil and
the used filter elements to determine if such
Replace all belts in a set when one is worn. Single belts
practice is practical for proper protection of the
of similar size should not be used as a substitute for a
engine.
matched belt set; premature belt wear can result
because of belt length variation. All belts in a matched
b. Make a visual check of all lubricating oil lines for
belt set are within
.032"of their specified center
wear and chafing. If any indication of wear is
distances.
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