Cover Detent Plunger M240b

Feed and holding pawl springs are removed and installed the same way. Remove and assemble one set of springs before removing other set.

Feed pawl springs (5) are 9 1/2 coils long. Holding pawl springs (6) are 12 3/4 coils long. Be sure coils of feed pawl springs (5) are seated in well of feed pawl (2). Install one end of spring (5) into well of feed pawl (2).

Hold feed pawl (2) (or holding pawls (3)) and feed pawl spring (5) (or holding pawl spring (6)) and insert screwdriver (4) between last coils of exposed feed pawl springs (5) (or holding pawl spring (6)) and compress to slip into well of feed pawl (2) (or holding pawls (3)). Install other feed pawl spring (5) (or holding pawls (3)) in the same way.

Replacing Pawl Springs

DIRECT SUPPORT MAINTENANCE OF RECEIVER ASSEMBLY M240/M240C, NSN N/A, PN 11826192; M240B, NSN N/A, PN 12976834; M240D, NSN N/A, PN 12977104; M240E1, NSN N/A, PN 12597044; M240G, NSN N/A, PN 12997566; M240N, NSN N/A, PN 12976834

This task covers: a. Disassembly b. Inspection/Repair c. Reassembly

INITIAL SETUP

Tools and Special Tools

Shop Set, Small Arms: Field Maintenance, Basic Less Power, PN SC 4933-95-CL-A11; SL-3-08724A (Marine Corps only); SL-3-00607A (Marine Corps only) Materials/Parts

Crocus abrasive cloth (item 3, WP 0074 00)

Materials/Parts

Loctite 246 (item 5, WP 0074 00)

Spring pin, PN MS16562-106

Washer, lock (8), W211NAG0019NN037NNPE1

Equipment Condition

Receiver assembly with major components removed (TM 9-1005-313-10).

DISASSEMBLY

Use cover detent plunger disassembly tool (1) to remove cover detent.

WARNING

Personal injury could occur if care is not exercised when installing cover detent plunger disassembly tool.

NOTE

Remove only to repair.

Position cover detent plunger disassembly tool (1) in the opening for feed tray (2) in receiver (3) so that its rear pins (4) rest against upper breechblock guides (5) and its nose (6) rests in groove of detent plunger (7).

M240 Assemble Disassemble

DIRECT SUPPORT MAINTENANCE OF RECEIVER ASSEMBLY M240/M240C, NSN N/A, PN 11826192; M240B, NSN N/A, PN 12976834; M240D, NSN N/A, PN 12977104; M240E1, NSN N/A, PN 12597044; M240G, NSN N/A, PN 12997566; M240N, NSN N/A, PN 12976834 (cont)

DISASSEMBLY (cont)

Personal injury could occur if care is not exercised when installing cover detent plunger disassembly tool.

Push lever (8) of cover detent plunger disassembly tool (1) fully downward so that pin (9) will come to rest on upper breechblock guides (5) and detent plunger (7) compresses springs (10) removing pressure on spring pin (11).

Remove spring pin (11).

Place one hand on cover detent plunger disassembly tool (1) to steady it. Then lift the lever (8) and remove the tool (1).

Remove detent plunger (7) and springs (10).

WARNING

M240b Nomenclature
1BL0256
M240b Nomenclature
1BL0257

Drive out and discard spring pin (12). Press headed straight pin (13) outward from inside of receiver (3).

Remove charger slide (14) by sliding it forward out of receiver (3).

M240b Nomenclature

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