Repair bolt and carrier assembly by replacing defective parts (WP 0055 00)._
BREECH ASSEMBLY
BREECH ASSEMBLY
Replace breech assembly (WP GG5i GG)._
FIRING PIN SLEEVE KEEPER
CAM-PIN ASSEMBLY
Assemble bolt and carrier assembly (WP 0055 00). Assemble bolt and track assembly (WP 0054 00). Install bolt and track assembly (WP 0053 00). Install barrel assembly (WP 0023 00). Place a dummy round in face of breech bolt and perform auto gun receiver manual cycle check (WP 0008 00). Perform automatic gun feeder manual cycle check (WP 0007 00)._
FIRING PIN SLEEVE KEEPER
CAM-PIN ASSEMBLY
CARRIER ASSEMBLY
FIRING PIN SLEEVE
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FIRING PIN ASSEMBLY
FIRING PIN SLEEVE
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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)
GUN CYCLES BUT WILL NOT FIRE
INITIAL SETUP:
TooIs and Special Tools
Artillery and turret mechanic's tool kit
(item 41, WP 0085 00) Turret mechanic's supplemental tool kit (item 44, WP 0085 00)
Equipment Conditions
WP 0026 00 Automatic gun feeder removed WP 0053 00 Bolt and track assembly removed WP 0054 00 Bolt and carrier assembly removed
TRACK ASSEMBLY
TRACK ASSEMBLY
Rotate safety handle to FIRE and back to SAFE. Does safety pawl move up and down when handle is moved? | |||||||||||||||||||||||||||||||||||||||||||||
NO ^ |
Repair track by replacing safety actuator and/or safety pawl (WP 0056 00). | ||||||||||||||||||||||||||||||||||||||||||||
w | |||||||||||||||||||||||||||||||||||||||||||||
YES |
SAFETY PAWL TRACK SAFETY ACTUATOR SAFETY PAWL TRACK
GUN CYCLES BUT WILL NOT FIRE - Continued Ensure breech bolt is in forward dwell position (uncocked) and check firing pin assembly protrusion. Is firing pin protrusion between 0.059 in. and 0.098 in. (1.5 mm and 2.5 mm)?_ Repair bolt and carrier assembly by replacing firing pin assembly (WP 0055 00)._ FIRING PIN ASSEMBLY FIRING PIN ASSEMBLY
CAM-PIN ASSEMBLY (DWELL POSITION (UNCOCKED)) B0LT AND CARRIER ASSEMBLY BREECH BOLT ![]() CARRIER ASSEMBLY BREECH BOLT CARRIER ASSEMBLYDisassemble bolt and carrier assembly (WP 0055 00) and check parts for cracks, breaks, chips, and missing parts. Check firing pin assembly for burnt or broken firing pin tip and broken spring. Do these conditions exist? Repair bolt and carrier by replacing defective parts (WP 0055 00). FIRING PIN SLEEVE KEEPER CAM-PIN ASSEMBLY CARRIER ASSEMBLY FIRING PIN SLEEVE KEEPER CAM-PIN ASSEMBLY CARRIER ASSEMBLY ![]() FIRING PIN ASSEMBLY FIRING PIN SLEEVE FIRING PIN ASSEMBLY FIRING PIN SLEEVE Check firing pin pawl and safety pawl for chips, breaks, and worn or missing parts. Do these conditions exist? Repair track by replacing firing pin pawl, safety pawl, or helical springs (WP 0056 00)._ HELICAL SPRINGS' SAFETY PAWL FIRING PIN PAWL SAFETY PAWL FIRING PIN PAWL HELICAL SPRINGS'
Assemble bolt and carrier assembly (WP 0055 00). Assemble bolt and track assembly (WP 0054 00). Install bolt and track assembly (WP 0053 00). Perform auto gun receiver manual cycle check (WP 0008 00). UNIT M242 25-MM AUTOMATIC GUN (NSN 1005-01-086-1400) M242 25-MM ENHANCED AUTOMATIC GUN (NSN 1005-01-454-0396) GUN FIRES WITH SAFETY ON INITIAL SETUP: TooIs and Special Tools Artillery and turret mechanic's tool kit (item 41, WP 0085 00) Turret mechanic's supplemental tool kit (item 44, WP 0085 00) Equipment ConditionsWP 0023 00 Barrel assembly removed WP 0026 00 Automatic gun feeder removed WP 0053 00 Bolt and track assembly removed WP 0054 00 Bolt and carrier assembly removed SAFETY LINK SAFETY PAWL FIRING PIN PAWL SAFETY LINK SAFETY PAWL FIRING PIN PAWL ![]() SLIDER MASTER LINK CHAIN SLIDER MASTER LINK CHAIN TRACK ASSEMBLY
Repair track by replacing defective safety pawl (WP 0056 00)._ Repair track by replacing defective safety pawl (WP 0056 00)._ GUN FIRES WITH SAFETY ON - Continued
![]() END OF WORK PACKAGE |
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