M240n Machine Gun Condition

Both barrels and bolt assembly must accompany receiver when weapon is turned in.

Both barrels must pass headspace test.

M240 Muzzle And Breech Bore Wear Gage
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CHAPTER 5 DIRECT SUPPORT MAINTENANCE PROCEDURES

DIRECT SUPPOT MAINTENANCE OF M240 SERIES MACHINE GUN M240, NSN 1005-01-025-8095, PN 11826290; M240B, NSN 1005-01-412-3129, PN 12976814; M240C, NSN 1005-01-085-4758, PN11826175; M240D, NSN 1005-01-418-6995, PN 12977099; M240E1, NSN 1005-01-252-4288, PN 12597033; M240G, NSN 1005-01-359-2714, PN 12999566; M240N, NSN 1005-01-493-1666, PN 12999178

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

INITIAL SETUP

References TM 9-1005-313-10

NOTE

Do not mix lubricants on the same weapon. The weapon must be thoroughly cleaned during change from one lubricant to another. Cleaning solvent (item 4, WP 0074 00) is recommended for cleaning during change from one lubricant to another.

Under all but the coldest of artic conditions, LSA (item 9, WP 0074 00), CLP (item 1, WP 0074 00) or LSAT (item 10, WP 0074 00) (Marine Corps only), are the lubricants to use on your machine gun. For extreme cold conditions (0o or below) LAW (item 8, WP 0074 00) is the recommended lubricant.

When a machine gun is received at direct support maintenance, all gaging requirements must be checked as a standard maintenance procedure.

Both barrels and bolt assembly must accompany receiver when weapon is turned in. DISASSEMBLY

WARNING

Be sure to clear weapon before disassembling, cleaning, inspecting, transporting, or storing.

Field-strip the weapon (TM 9-1005-313-10).

DIRECT SUPPOT MAINTENANCE OF M240 SERIES MACHINE GUN M240, NSN 1005-01-025-8095, PN 11826290; M240B, NSN 1005-01-412-3129, PN 12976814; M240C, NSN 1005-01-085-4758, PN11826175; M240D, NSN 1005-01-418-6995, PN 12977099; M240E1, NSN 1005-01-252-4288, PN 12597033; M240G, NSN 1005-01-359-2714, PN 12999566; M240N, NSN 1005-01-493-1666, PN 12999178 (cont)

INSPECTION/REPAIR/REASSEM BLY

Visually inspect assemblies for damage. See appropriate maintenance work package for repair.

M240 Disassembled
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Reassemble weapon (TM 9-1005-313-10).

DIRECT SUPPORT MAINTENANCE OF BARREL ASSEMBLY M240/M240C, NSN 1005-01-044-1026, PN 11825985; M240B, NSN N/A, PN 12976817; M240D/M240G/M240N, NSN 1005-01-408-5897, PN 12976818; M240E1, NSN 1005-01-251-9701, PN 12597035

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

INITIAL SETUP

Tools and Special Tools

Breech bore erosion gage, PN 11826298 Muzzle and breech bore wear gage,

PN 11826276 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)

TESTING

NOTE

Replacement of barrel assembly or barrel adapter requires DS level gaging (WP 0038 00).

A clean bore is not necessarily a shiny bore and frequently it may have a dull gray appearance. A shiny, polished bore may indicate abrasives have been used. Abrasives will NOT be used on the bore, piston or inside of the gas cylinder.

Gently but fi rmly insert breech bore erosion gage (1) into breech end (2) of barrel (3) as far as it will go.

Read gage (1) at the end of barrel breech (2). Replace barrel (3) if the reject mark (4) on the gage enters the breech. The barrel is not suitable for overseas shipment if the reading exceeds the preembarkation warning mark (5).

Muzzle And Breech Gage M240

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Materials/Parts

Spring, pin, PN MS16562-122

Equipment Condition

Barrel removed from receiver (TM 9-1005-313-10).

DIRECT SUPPORT MAINTENANCE OF BARREL ASSEMBLY M240/M240C, NSN 1005-01-044-1026, PN 11825985; M240B, NSN N/A, PN 12976817; M240D/M240G/M240N, NSN 1005-01-408-5897, PN 12976818; M240E1, NSN 1005-01-251-9701, PN 12597035 (cont)_

TESTING (cont)

Use muzzle and breech bore wear gage (6) to the test barrel (3). Gently but firmly insert gage (6) into breech end (2) of barrel (3) as far as it will go.

Read muzzle and breech bore wear gage (6) at the end of barrel breech (2). Replace barrel (3) if the rejection mark (4) on gage (6) enters the breech. The barrel is not suitable for overseas shipment if the reading exceeds the preembarkation warning mark (5).

M240n Machine Gun
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Gently but firmly insert muzzle and breech bore wear gage (6) into the muzzle end (7) of barrel (3) as far as it will go.

Read muzzle and breech bore wear gage (6) at the end of flash hider/suppressor (8). Replace barrel (3) if:

• (M240/M240C/M240E1): Rejection mark (4) on gage (6) enters flash hider/suppressor (8). The barrel is not suitable for overseas shipment if the reading exceeds preembarkation warning mark (5).

• (M240B/M240D/M240G/M240N): Rejection mark (10) on gage (6) enters flash hider/suppressor (8). The barrel is not suitable for overseas shipment if the reading exceeds preembarkation warning mark (9).

Abn Machine Gun Repeating Weapons
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  • Dehab
    WHAT WEAPON DOES NSN 1005012519701 WITH?
    6 years ago
  • arianna
    Which weapon condition does not apply to m240g?
    9 months ago

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