4-15. AUXILIARY POWER UNIT.
4-15.1 Auxiliary Power Unit Assembly
This task covers
Tool Kit, Master Mechanic,
29, Appendix E Threadlock Liquid
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
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.
detailed in para. 4-19 1.
Clamp inlet and outlet water hoses (5, 7,
and 11) with hose crimp retaining pliers.
Loosen hose clamps (6, 8 and 12) and
pull hoses of water pump.
Tag and disconnect electrical wires to
engine starter motor and alternator.
Loosen hose clamps (9) on air intake hose
(10) Pull air intake hose from engine.
Disconnect fuel delivery and return hose
Loosen both cover holding capscrews (13)
and lift cover (14) up.
Unscrew and remove pulley cover
(15) from compartment.