3-9. APU AIR CLEANER
This task covers:
Solvent (Item 3, Appendix E)
Main Engine Shutdown (see para 2-12 .)
Oil (Item 14, Appendix E)
APU Shutdown (see para 2-16 .)
Batteries Disconnected (see para 4-114 .)
Remove two wing nuts (1) and air cleaner cover (2).
Remove foam filter (3) and mesh filter (4) from bracket (5).
Inspect filters for damage. Replace filters as needed.
Wash foam filter (3) in solvent (item 3, Appendix E) or diesel fuel.
Dip foam filter in clean oil (item 14, Appendix E) of same viscosity and grade as APU crankcase
Squeeze dry foam filter.
Clean mesh filter by tapping it on hard surface. If excessive dirt still remains, replace mesh filter.
Assemble mesh filter (4), foam filter (3), and install on bracket (5).
Install air cleaner cover (2) and secure with two wing nuts (1).
Connect batteries (see para 4-114).