Air Cleaner Filter Clog Indicator Rework

TB 9-2300-378-14

(a) Using 9/16 wrench, loosen remaining captive screws securing access door to

housing (view A).

(b) Position a block (2 x 4 x 18) of wood across fender storage box so access door

will rest on block of wood when door is opened.

(c) Open access door allowing it to rest firmly against block of wood. Block

must be positioned to inside of captive screw(s) (view B).

(d) Remove filter element, cover, and store temporarily in a safe place.

(e) Using tape and cardboard or a large cloth, cover housing opening (so dirt

cannot fall into box). (Do not cover housing bolt holes.)

(f) Using a hammer and punch drive pin, drive out damaged captive screw(s)

(view C).

(g) Remove tape, cardboard or cloth from housing opening. Using a damp clean

rag, wipe inside of filter housing removing any dirt or metal chips.

(h) Install filter element, make sure all seals and --

gaskets are in place. Carefully

close access door (view B).

CAUTION

It may be necessary for mechanic to kneel on access door to

s t a r t screws. M a k e sure screws are fully engaged before

releasing weight from access door or hole threads will be

stripped.

(i) Install three new screws PN 12290914, NSN 5306-01-091-3384 in access door

and finger tighten (view D). U s i n g torque wrench, tighten three screws,

starting with middle, to 40-48 lb-ft (54-65 NM).

(j) Repeat procedure for opposite air cleaner.

4-4. Air Cleaner Filter Clog Indicator Rework

General.

The following procedures to rework the air cleaner outlet elbow to accept the late

model filter clog indicator.

Rework Procedure.

(1) Tools and Equipment Required:

(a) H a c k s a w

(b) S c r i b e

(c) 1/8 - 27 NPTF tap

(d) Electric drill with a 90 drive angle with a 3/8 inch chuck

4-7