Caution

Apply grease only as specified in step below. Dust and dirt sticking to greased parts can be carried into auto gun receiver and cause automatic gun to jam.

Using acid brush, apply a light coat of grease to shank of headed straight pin (1) and to outside surface of sleeve bushing (2).

ASSEMBLY

1. INSTALL ROUND POSITIONER.

a. Install bushing (1) and headed straight pin (2) in center holes of two positioners (3) and secure with new cotter pin (4). Bend ends of cotter pin (4) in opposite directions around headed straight pin (2).

b. Push sleeve bushing (5) into flat spring (6) until it is flush with spring edges.

c. Place flat spring (6) between round positioners (7) and install headed straight pin (8) through round positioners (7) and flat spring (6).

d. Install new cotter pin (9) in headed straight pin (8). Bend ends of cotter pin (9) in opposite directions around headed straight pin (8).

2. INSTALL ROUND POSITIONER ASSEMBLY (WP 0037 00).

3. INSTALL FEEDER ASSEMBLY ROTOR (WP 0036 00).

4. INSTALL FORWARD FEED ASSEMBLY (WP 0034 00).

5. INSTALL EJECTION CHUTE (WP 0032 00).

6. INSTALL LINK SHIELD (WP 0029 00).

7. INSTALL LINK BRIDGES FOR STANDARD FEEDER (WP 0027 00) OR INSTALL LINK COVER ASSEMBLIES FOR ENHANCED FEEDER (WP 0028 00).

ASSEMBLY - Continued

8. PERFORM AUTOMATIC GUN FEEDER MANUAL CYCLE CHECK (WP 0007 00).

9. 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)

UPPER AND LOWER FEED SPROCKET ASSEMBLIES REMOVAL/INSTALLATION REMOVAL, INSPECTION, LUBRICATION, INSTALLATION

INITIAL SETUP:

Materials/Parts

Acid brush (item 4, WP 0116 00) Grease (item 11, WP 0116 00)

References

WP 0007 00

Equipment Conditions

WP 0026 00 Automatic gun feeder removed WP 0027 00 Link bridges removed

(Standard Feeder only) WP 0028 00 Link cover assemblies removed

(Enhanced Feeder only) WP 0029 00 Link shield removed WP 0031 00 Rear link strippers removed WP 0032 00 Ejection chute removed WP 0034 00 Forward feed assembly removed WP 0036 00 Feeder assembly rotor removed WP 0037 00 Round positioner assembly removed

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