Note

Annular ball bearings may have stuck to mechanical housing during removal. 5. INSTALL CLUTCH ASSEMBLY.

a. If not in mechanical housing install annular ball bearing (1) on geared end of clutch assembly (2).

b. Insert splined end of clutch assembly (2) in bevel gear (3). At the same time, install spur gear cluster (4) until it mates with spur clutch gearshaft (5) of clutch assembly (2).

M242 25mm Bevfitchett

6. INSTALL MECHANICAL HOUSING.

a. Push release link (6) on electrical sear solenoid (7) and install mechanical housing (8) on auto gun receiver (9).

b. Tap mechanical housing (8) until seated.

c. Install the two short capscrews (10) into the large lower part of mechanical housing (8).

d. Install the four remaining long capscrews (11) in remaining four holes of mechanical housing (8).

e. Torque six capscrews (10) and (11) to 80 in.-lbs ± 5 in.-lbs (9.04 N-m ± 0.57 N-m).

8. INSTALL COVER ASSEMBLY AND SEAR RETRACTOR ASSEMBLY (WP 0063 00).

9. INSTALL DIRECT CURRENT MOTOR (WP 0061 00).

10. INSTALL STRAIGHT DRIVE SHAFT (WP 0060 00).

11. INSTALL BOLT AND TRACK ASSEMBLY (WP 0053 00).

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

13. INSTALL AUTOMATIC GUN FEEDER (WP 0026 00). END OF WORK PACKAGE

M242 25mm Gear Clutch Installation

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UNIT

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

CLUTCH ASSEMBLY DISASSEMBLY/ASSEMBLY DISASSEMBLY, CLEANING, INSPECTION, LUBRICATION, ASSEMBLY, TESTING

INITIAL SETUP:

Tools and Special Tools

Artillery and turret mechanic's tool kit

(item 41, WP 0085 00) Goggles (item 19, WP 0085 00) Receiver clutch slippage torque test holder

(item 21, WP 0085 00) Rubber gloves (item 18, WP 0085 00) Screwdriver bit (item 3, WP 0085 00) Torque wrench, 0-175 ft-lb (item 52,

WP 0085 00) Turret mechanic's supplemental tool kit

(item 44, WP 0085 00) Vise (item 45, WP 0085 00) Vise jaw caps (item 5, WP 0085 00)

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