TM 5-3895-346-14
PREVENTATIVE MAINTENANCE
ENGINE OVERHAUL
Figure 2. Items 4 and 12
Figure 3. Item 6
Item 5 Battery
Check the specific gravity of the electrolyte in each cell of the battery every 100 hours or 3000 miles. In warm
weather, however, it should be checked more frequently due to a more rapid loss of water from the electrolyte.
The electrolyte level should be maintained in accordance with the battery manufacturer's recommendations.
Item 6 Tachometer Drive
Lubricate the tachometer drive every 100 hours or 3000 miles with an all purpose grease at the grease fitting.
At temperatures above +30 (-1 ), use a No. 2 grade grease. Use a No. 1 grade grease below this
F
C
temperature.
Item 7 Air Cleaner
Under no engine operating conditions should the air inlet restriction exceed 25 inches of water (6.2 kPa) for
nonturbocharged engines or 20 inches of Figure 3. Item 6 water (5.0 kPa) for turbocharged engines. A clogged
air cleaner element will cause excessive intake restriction and a reduced air supply to the engine.
Dry Type
Clean or replace the element in the dry-type Donaldson 'Cyclopac' air cleaner when the restriction indicator
instrument indicates high-restriction or when a water manometer reading at the air inlet housing indicates the
maximum allowable air inlet restriction (Engine Operating Conditions Specifications).
Item 8 Drive Belts
New drive belts stretch during the first few hours of operation. Run the engine 15 seconds to seat the belts,
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