Upper And Lower Feed Sprocket On The M242

Feeder drive assembly has been positioned with the lower feeder drive assembly hole and splines in the uppermost or top hole position.

If feed sprocket assemblies are installed with round positioner spring attached, feed sprocket assemblies may need to be pulled against spring tension to align holes.

1. INSTALL UPPER FEED AND LOWER FEED SPROCKET ASSEMBLIES.

a. Align lower feed sprocket assembly (1) (short shaft) with lower feeder drive assembly hole (2) (top hole).

b. Twist lower feed sprocket assembly (1) in either direction until sprocket shaft splines match feeder drive assembly splines.

c. Slide shaft of lower feed sprocket assembly (1) into place.

Ejection Shute 25mm Feeder

d. Place upper feed sprocket assembly legs (3) between lower feed sprocket assembly legs (4). Align upper feed sprocket shaft splines with upper feeder drive assembly hole splines (5) (bottom hole).

e. Slide shaft into place.

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 REAR LINK STRIPPERS (WP 0031 00).

7. INSTALL LINK SHIELD (WP 0029 00).

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

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

10. 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)

FEEDER STANDOFF REMOVAL/INSTALLATION REMOVAL, INSPECTION, INSTALLATION

INITIAL SETUP:

Tools and Special Tools

Turret mechanic's supplemental tool kit (item 44, WP 0085 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 0032 00 Ejection chute removed WP 0034 00 Forward feed assembly removed

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