1-28. CHANGING APU OIL (Continued)
Do not use DOD-L-85734 oil in tur-
bine engines. DOD-L-65734 oil is to
be used in transmissions and gear-
boxes only. If DOD-L-85734 oil is
inadvertently added to the APU, the
oil should be drained and the APU
serviced with the correct oil.
Clean top of by-pass valve housing (2) before removal
to prevent contamination.
Remove retaining ring (1), by-pass valve housing (2)
and filter element (4) using tool (T23). Discard pack-
Inspect filter element (4) for contami-
nation (refer to paragraph 1-30).
Ensure packing (5) is properly lubricated and seated
inside filter element (4).
Lightly lubricate new packing (4) with assembly fluid
(E31). Lubricate and install new packing (3) on by-
pass valve housing (2).
Install new filter element (4). by-pass valve housing
(2) and retaining ring (1).
Install drain plugs (Task 1-27).
Service APU (Task 1-26).
FOLLOW ON MAINTENANCE:
END OF TASK