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TM 5-4210-220-12
4-15. AUXILIARY POWER UNIT.
4-15.1 Auxiliary Power Unit Assembly
This task covers
a. Removal
b. Disassembly
c. Assembly
d. Inspection
e. Installation
TOOLS
MATERIALS/PARTS
Tool Kit, Master Mechanic,
29, Appendix E Threadlock Liquid
NSN 5180-00-699-5273
6LD325/AMERTEK Engine
MS51922-17 Locknut
EQUIPMENT CONDITION
310592 Locknut
Main Engine Shutdown (see para. 2-10)
MS51922-1 Locknut
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
WARNING
Exhaust systems can be hot enough to cause serious burns. Allow exhaust system to cool
before maintaining the APU.
Engine coolant can be hot enough to cause serious burns. Allow engine to cool before
maintaining the APU.
REMOVAL
(1)
Disconnect
APU
engine
exhaust
as
detailed in para. 4-19 1.
(2)
Clamp inlet and outlet water hoses (5, 7,
and 11) with hose crimp retaining pliers.
(3)
Loosen hose clamps (6, 8 and 12) and
pull hoses of water pump.
(4)
Tag and disconnect electrical wires to
engine starter motor and alternator.
(5)
Loosen hose clamps (9) on air intake hose
(10) Pull air intake hose from engine.
(6)
Disconnect fuel delivery and return hose
at engine.
(7)
Loosen both cover holding capscrews (13)
and lift cover (14) up.
(8)
Unscrew and remove pulley cover
(15) from compartment.
4-140
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