Inspectionrepair

Remove burrs from parts with fine file or crocus cloth (item 4, WP 0074 00).

Check pins (11, 12, and 13) for distortion, cracks, or excessive wear. Replace if distorted, cracked, or worn excessively.

M240 Machine Gun Parts List

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)

Check springs (10) for breaks, cracks, or distortion. Replace both springs if one is broken, cracked, or deformed.

Check charger slide (14) for distortion, cracks, or burrs. Replace if distorted, cracked, or if slide does not operate freely in the receiver.

M240 Receiver Blueprints

Check receiver (3) and gas cylinder (41) for cracks, distortion and burrs. Remove burrs with fine stone or crocus cloth (item 3, WP 0074 00). If receiver/gas cylinder is cracked or distorted, receiver is unserviceable.

Check detent plunger (7) for cracks, wear, or burrs. Replace if removal of burrs would cause malfunction.

NOTE

Forward rail assembly to be removed only for replacement.

(M240B): Inspect forward rail body assembly (31) for cracks or bends, which will effect rail alignment or contact with gas tube. Check for loose cap screws.

M240n Machine Gun

Install bipod assembly. Using a punch, push the bipod retaining pin (21) into cut-out in the bipod head (24). Ensure retaining pin (21) is loose enough to prevent binding of bipod head.

M240n Machine Gun

(M240B/M240G/M240N): With receiver upside down, place the retaining latch spring (20) into bipod retaining latch (17). Place both latch and spring into the receiver. Align holes and install retaining latch pin (19). Push bipod retaining latch (17) into the receiver and close access cover (18).

M240 Receiver

Install charger slide (14) into right front side of receiver (3) and slide rearward.

M240 Receiver

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)

REASSEMBLY (cont)

Install headed straight pin (13) in charger slide (14). Align headed straight pin (13) slot with slide spring pin hole and secure with new spring pin (12). Spring pin (12) must be flush on both sides.

If new springs are used, open the first coil on one end of each spring prior to insertion. Either end may be used to secure detent plunger.

Lubricate detent plunger (7) and two springs (10) with lubricating oil and insert springs (10) into wells in detent plunger (7) (open end is inserted in the plunger first).

Install detent plunger (7) in receiver (3) with slot in detent plunger (7) facing down. Start spring pin (10) into hole (25) in receiver.

M240 Upper Receiver

1BL0265

NOTE

1BL0265

NOTE

M240 Upper Receiver
1BL0266
Detent Pawl Gun

Push lever (8) of cover detent plunger disassembly tool (1) fully downward so that detent plunger (7) compresses springs (10) and pin (26) will come to rest on upper breechblock guides (5) of receiver (3).

Complete installation of spring pin (11).

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

Browning Auto Diagram

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