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TM 5-4210-220-12
4-15. AUXILIARY POWER UNIT - Continued
4-15.14 Engine Adjustment
This task covers
Adjustment
TOOLS
Tool Kit, Master Mechanic,
NSN 5180-00-699-5273
EQUIPMENT CONDITION
APU Shutdown (see para. 2-12)
Engine Removed from Base
MATERIALS/PARTS
500.4601.020 Crankcase Cover Gasket (0.20 mm)
500.4601.002 Crankcase Cover Gasket (0.30 mm)
NOTE
Engine turning is usually carried out after repair of the engine. In this case the crank cover will
be removed from engine (instruction 1-3 below).
ADJUSTMENT.
(1)
Drain oil from engine by removing oil pan
plug.
(2)
Remove any burrs from crank, drive end.
(3)
Remove crankcase cover screws. Lift off
cover and gasket.
(4)
Loosen screw on control lever and push
control lever to maximum fuel position.
Ensure throttle lever is at maximum
position. Tighten screw on control lever.
(5)
Replace crankcase cover, if necessary
checking camshaft end play (See para. 4-
15.12 INSTALLATION steps 14 thru 18).
(6)
The engine can only be properly adjusted
if mounted on a dynamometer. If this is
not possible, mount engine to bench with
temporary fuel and power supply (For a
better test, mount engine on base,
connect water pump and alternator.
Connect water to pump and alternator to a
set of discharged batteries).
(7)
Start engine and run it at low idle for 15
minutes
or
until
it
reaches
normal
operating temperature
4-190
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