Warning

If weapon has been determined to be contaminated (radioactive), all warnings at the beginning of WP 0022 00 shall be in effect.

Auto gun receiver is too heavy for one person to lift. Get help to lift or carry auto gun receiver.

Do not wear jewelry when working on gun. Serious injury or death may occur.

Keep your fingers away from moving parts of gun. Serious injury or death may occur.

REMOVAL

1. PLACE AUTO GUN RECEIVER ON A CLEAN, FLAT SURFACE. Position auto gun receiver (1) with latch bracket (2) on top as shown.

2. REMOVE TRACK HOOK LATCH AND SPRING TENSION WASHER.

a. Remove cotter pin (3) from headed straight pin (4). Discard cotter pin.

b. Pull headed straight pin (4) from latch bracket (2).

Bevfitchett M242 25mm

c. Lift track hook latch (5) and spring tension washer (6) from latch bracket (2).

Track Hook Latch M242

INSPECTION

1. INSPECT TRACK LATCH HOOK.

Visually inspect track hook latch (1) for cracks, bends, and breaks. If any of these conditions are found, replace track hook latch.

2. INSPECT SPRING TENSION WASHER.

Visually inspect spring tension washer (2) for cracks, breaks, and excessive spring set. If any of these conditions are found, replace spring tension washer.

3. INSPECT AUTO GUN RECEIVER.

Visually inspect auto gun receiver for loose or damaged screw threaded inserts. If either of these conditions are found, send auto gun receiver to Direct Support Maintenance for repair.

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LUBRICATION

LUBRICATE TRACK HOOK LATCH AND HEADED STRAIGHT PIN.

Using acid brush, apply a light coat of grease to hook of track hook latch (1) and to headed straight pin

INSTALLATION

1. INSTALL TRACK HOOK LATCH AND SPRING TENSION WASHER.

a. Place spring tension washer (1), with dome facing out, on track hook latch (2).

b. While holding spring tension washer (1) in position, place track hook latch (2) and spring tension washer (1) into latch bracket (3). Align pin holes.

c. Push headed straight pin (4) into latch bracket (3) from direction shown.

d. Install new cotter pin (5) in headed straight pin (4).

e. Bend ends of cotter pin (5) in opposite directions around headed straight pin (4).

3. PERFORM AUTO GUN RECEIVER MANUAL CYCLE CHECK (WP 0008 00).

4. INSTALL AUTOMATIC GUN FEEDER (WP 0026 00).

END OF WORK PACKAGE

UNIT

M242 25-MM AUTOMATIC GUN (NSN 1005-01-086-1400) M242 25-MM ENHANCED AUTOMATIC GUN (NSN 1005-01-454-0396)

LATCH BRACKET REMOVAL/INSTALLATION REMOVAL, INSPECTION, INSTALLATION

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