Disassemblyrepairreassembly

Remove self-locking nut (1) and trigger actuating pivot (2) to release actuating link spring (3), link actuating assembly (4), and washer (5) from plate protecting body (6). Discard self-locking nut (1). Install washer (5), link actuating assembly (4), actuating link spring (3) on plate protecting body (6) using actuating link pivot (2) and new self-locking nut (1).

Reassembly

Ensure all metal parts are lightly lubricated. Insert sear (8) into lever slot in trigger (13) sideways. Give the sear a quarter turn, as viewed from the left side, polished side up. Place trigger housing (7) on its side on a flat surface. Insert sear spring (12), with leg pointing forward, into trigger (13). The lower tip of sear spring (12) must bear against the riveted pin (14) across the back of trigger (13) when trigger is later rotated rearward. Be sure leg of sear spring (12) is in...

Inspectionrepair

M240 Back Plate

Replace if bent or broken. Check detent plunger (7). Replace if bent or broken. Check helical compression spring (6) for deformation of breaks. Replace if damaged, broken, or deformed. Check back plate latch (5) for cracks or breaks. Replace if damaged. Check back plate (12) for damaged threads and burrs. Remove burrs with file. Replace buffer assembly if threads are damaged. Check machine plug (14) for deformation or rounded shoulders of octagon head. Replace if...

Lubrication

M4a1 Exploded Trigger View

Lightly lubricate all metal parts after cleaning. Take care to be sure safety (7) is clean and lightly lubricated. Insert sear (6) into slot in trigger (11) sideways. Give the sear a quarter turn, as viewed from left side, polished end upward. Lower sear (6) and trigger (11) into trigger housing (4). Grasping trigger, press it forward against the inner front edge of housing. This action will push backward on the lever allowing the trigger to slide into place. Align holes in trigger (11) and...

Disassembly

M240 Machine Gun Disassembly

Use a flat tipped screwdriver to remove the two grip screws (1) holding the right (2) and left (3) grips in place. Remove trigger guard pin (4) and trigger guard (5) from the trigger housing assembly only if trigger guard is damaged. Pull back on tripping lever (6) inside trigger housing (7) and raise sear (8). Rotate safety (9) a quarter turn clockwise (as viewed from the left side). Letters S and F will face downward. Pull safety (9) through trigger housing (7) from right to left. Remove...

Further Testing cont

Smith Machine With Turn Latch

Release barrel locking latch (3) and turn barrel release latch (2) to upright position and move barrel assembly (4) slightly forward. Remove headspace gage (23 25) from chamber (24). Place barrel assembly (4) back into receiver (13) and lock in position. Lower feed tray (20) and close and lock cover (9).

Maintenance Functions

Maintenance functions are limited to and defined as follows 1. Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and or electrical characteristics with established standards through examination (e.g., by sight, sound, or feel). This includes scheduled inspection, gagings and evaluation of cannon tubes. 2. Test. To determine the serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of an item and comparing those...

Technical Manuals

TM 9-1005-313-10 Operator's Manual, Machine Gun, 7.62, M240 1005-01-025-8095 TO 11W2-6-5-1 Machine Gun, 7.62, M240B 1005-01-412-3129 Machine Gun, 7.62, TM 08670A-10-1B M240C 1005-01-085-4758 Machine Gun, 7.62, M240D 1005-01-418- SW360-AH- 0PI-010 6995 Machine Gun, 7.62, M240E1 1005-01-252-4288 Machine Gun, 7.62, M240G 1005-01-359-2714 Machine Gun, 7.62, M240N 1005-01493-1666 TM 9-1300-206 Ammunition and Explosives Standards TM 750-244-7 Procedures for Destruction of Equipment in Federal Supply...

All markings must be legible Specific Standards

Refer to Table 1, Standards for preembarkation inspection. Table 1. STANDARDS FOR PREEMBARKATION INSPECTION OF 7.62MM MACHINE GUN, IN UNITS ALERTED FOR OVERSEAS MOVEMENT Table 1. STANDARDS FOR PREEMBARKATION INSPECTION OF 7.62MM MACHINE GUN, IN UNITS ALERTED FOR OVERSEAS MOVEMENT Must pass barrel erosion check warning mark on gage WP 0024 00 . Must pass headspace check using headspace warning gage WP 0038 00 . Maximum - 7.045 kg 15 1 2 lb . Use trigger pull measuring fixture WP 0038 00 . 8.5 kg...

Inspectionrepair cont

M240 Mount For Usmc

Be sure bolt linkage moves freely through range of operation. If it does not move freely, notify direct support maintenance. Marine Corps replace at unit maintenance. Inspect extractor plunger 16 , extractor spring assembly 17 , ejector 3 , helical compression ejector spring 9 , and extractor 15 for damage. Replace if damaged. Inspect bolt breech body 4 . If bolt breech body is damaged, notify direct support maintenance.

Note

The plug 5 is designed with three gas inlet setting to maintain the rate of fire. This design is intended to maintain a constant rate of fire under adverse conditions and NOT TO INCREASE RATE OF FIRE. Gas inlet setting number 1 6 number facing the barrel is preferred for normal conditions. Setting 1 650 rds m approx. 600 rds m M240B M240N with hydraulic buffer only Setting 2 750 rds m approx. 625 rds m M240B M240N with hydraulic buffer only Setting 3 950 rds m approx. 650 rds m M240B M240N with...

Heat Shield Benelli

Benelli Nova Heat Shield

Do not remove liner from heat shield. Remove heat shield from barrel M240B only . M240 M240C, NSN 1005-01-044-1026, PN 11825985 M240B, NSN N A, PN 12976817 M240E1, NSN 1005-01-251-9701, PN 12597035 M240D M240G M240N, NSN 1005-01-408-5897, PN 12976818 cont _ Secure barrel assembly 2 in a vise 3 using protective jaws 4 with gas regulator 5 up. Use 23mm box and open-end combination wrench 6 to remove flash hider 7 . Rotate collar 8 until it releases, and then pull it out. Drive out plug 9 using a...

Bev Fitchett Gun 240b

Buy East German Makarov

M240 M240C M240E1 Check barrel release 23 for cracks or distortion. Replace if cracked or distorted. M240 M240C M240E1 Inspect barrel release latch 24 for breaks or cracks. Replace if damaged. M240B M240D M240G M240N Inspect barrel catch 33 and spring 34 . Replace if cracked or distorted. Inspect barrel adapter nut 25 for damaged threads or cracks. Replace if damaged. M240B M240D M240G M240N Inspect nut locking pin 26 for cracks or distortion. Replace if missing or damaged. Repair front sight...

Mg Nsn Na Pn Mn Nsn Na Pn

Inspection Repair c. Reassembly INITIAL SETUP Tool Kit, Small Arms Repairman, PN SC 5180-95-B71 SL-3-08724A Marine Corps only SL-3-00607A Marine Corps only Cotter pin, PN MS24665-437 Cotter pin 3 , PN 590479 Pin, spring, PN MS39086-91 Weapons lubricating oil as required Washer, lock 6 , PN MS35335-32 Receiver assembly with all major components removed TM 9-1005-313-10 .

M240 Gas Regulator Collar

Machine Gun Mag M240

Barrel and barrel adapter have left-hand threads. M240B M240D M240G M240N Place catch spring 34 into barrel catch 33 . Install barrel catch 33 into carrying handle assembly 27 . Hold carrying handle assembly vertically, place firmly against front shoulder of barrel 12 . 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 _ Screw...

How To Locate Repair Parts

First. Using the table of contents, determine the assembly group to which the item belongs. This is necessary since figures are prepared for assembly groups and sub-assembly groups, and lists are divided into the same groups. Second. Find the figure covering the functional group or the sub-functional group to which the item belongs. Third. Identify the item on the figure and note the number s . Fourth. Look in the repair parts list work packages for the...

Buttstock And Hydraulic Buffer Assembly Mbmn Nsn Pn And Buttstock And Buffer Assembly Mg Nsn Pn

Inspection Repair c. Reassembly INITIAL SETUP 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 Loctite sealing compound item 13, WP 0074 00 Spring pin, PN MS39086-1147 M240B Washer, Tab, Retaining, PN 93013A3204 M240G Buttstock and buffer assembly removed TM 9-1005-313-10 .

Scope

Type of Manual Unit and Direct Support Maintenance Manual. Model Numbers and Equipment Name M240, M240B, M240C, M240D, M240E1, M240G, and M240N, 7.62 MM, Machine Gun. Purpose of Equipment M240 M240C model is designed as a coaxial machine gun for tanks and 7.62MM fire power on light armored vehicles. The M240D model is designed as a pintle mounted window door gun for use in rotary aircraft. M240B M240G model is designed as a tripod mounted or bipod supported machine gun for use by ground forces....

Trigger Pull Test

Place test fixture 14 on bench and add test weights 15 until a minimum load 2.7 kg 6lb is reached. Charge weapon and place safety 7 to F position. Hold machine gun 16 in vertical position. Hook end of test fixture 14 over trigger 8 and slowly raise machine gun 16 in a line parallel to the barrel bore 17 until test weights 15 are suspended. The bolt assembly 18 should not move forward to firing position.

Disassemblyrepairassembly

M240 Spade Grip

Remove trigger assembly 2 , arm assembly 3 , and helical spring 4 . Repair by replacing unserviceable components. Install helical spring 4 , arm assembly 3 , and trigger assembly 2 . Secure with new spring pin 1 . Tool Kit, Small Arms Repairman, PN SC 5180-95-B71 SL-3-08724A Marine Corps only SL-3-00607A Marine Corps only Buffer and spade grip removed from receiver TM 9-1005-313-10 .

November

Be sure to clear your weapon before disassembling, cleaning, inspecting, transporting or storing. Make certain weapon is cleared and that there is no obstruction in the barrel or chamber. Before starting inspection, be sure to clear the weapon. Do not actuate the trigger until the weapon has been cleared. Inspect the chamber to be sure that it is empty, and check to see that there are no obstructions in the barrel. All small arms systems must be inspected and or gaged at least once annually for...

Final Inspection

Reassemble machine gun per TM 9-1005-313-10. Check the overall machine gun and make sure black finish surfaces do not reflect light. Weapon with more than 1 3 of exterior finish worn off should be sent to depot for overhaul. Check the tightness of all attaching screws, bolts, nuts, cotter pins, and rivets. A machine gun that has been repaired should be function fired whenever possible to be sure it operates properly. If weapon cannot be function fired, use dummy rounds and function test...

Location And Discription Of Major Components

Trigger Housing Assembly For M240

A BARREL ASSEMBLY - Houses cartridge for firing and directs projectile. B BUFFER ASSEMBLY - Absorbs recoil of bolt and operating rod assembly at the end of recoil movement. C DRIVING SPRING ROD ASSEMBLY - Provides energy for returning bolt and operating rod assembly to firing position. D BOLT AND OPERATING ROD ASSEMBLY - Provides feeding, stripping, chambering, firing, extraction, and ejection of cartridges using the projectile propelling gas for power. E TRIGGER HOUSING ASSEMBLY - Controls the...

Disassemblyinspectionrepairreassembly cont

11826299 Gage Headspace

Check pin 1 , barrel locking latch 2 and cap 5 for distortion, cracks, or excessive wear. Replace if distorted, cracked or excessively worn. Check spring 3 for breaks, cracks, or distortion. Replace if spring if broken, cracked or permanently set. M240B M240N Check hinge pin 6 for bends, cracks or excessive wear. Replace if damaged or worn. Check spring 7 for breaks or distortion. Replace if damaged. Check detent 8 for wear. Replace if worn. Check ejection port cover 9 for cracks or distortion....

Headspace 11826299

This section applies to Army users only. Table 1. Maintenance Allocation Chart for M240, M240B, M240C, M240D, M240E1, M240G, M240N Machine Gun cont Table 1. Maintenance Allocation Chart for M240, M240B, M240C, M240D, M240E1, M240G, M240N Machine Gun cont Table 2. Tool and Test Equipment Requirements for Machine Gun Table 2. Tool and Test Equipment Requirements for Machine Gun Tool, Combination Scraper and Extractor Tool Disassembly, Cover Detent Plunger Tool, Combination Front Sight Adjusting...

M240 Drive Spring

Machine Gun Mag M240c

Both barrels and bolt assembly must accompany receiver when weapon is turned in. Solid Film Lubricant SFL is the authorized touchup for the M240 Series Machine Gun and may be used on up to one third of the exterior finish of the weapon. FOR CONUS USE ONLY Solid Film Lubricant item 6, WP 0074 00 may be used as a touchup without limitation on the receiver assembly. This is to say that the units which DO NOT fall under the category of Divisional Combat Units of rapid deployment type units may have...

Explanation of the Illustrations of Manufactured Items

All instructions needed by maintenance personnel to manufacture the item are included on the illustration. All bulk materials needed for manufacture of an item are listed by part number or specification number in a tabular list on the illustration. Part Number Index No part numbers are associated with the manufactured item. MATERIAL FABRICATE FROM HEATER HOSE OR EQUIVALENT. DIMENSIONS INTERNAL DIAMETER - 0.50 IN. 1.27CM EXTERNAL LENGTH - 4.0 IN. 10.16 CM

Padded Vises To Remove Flash Hider

M240b Gas Regulator

Remove heat shield from barrel M240B only . Secure barrel assembly 12 in a vise 13 with protective jaws 14 with gas regulator 15 up. Use 23mm box and open end combination wrench 16 to remove flash hider suppressor 8 . M240B M240D M240E1 M240G M240N If necessary, remove two front sight adjusting screws 17 and front sight assembly 18 . 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...

Chapter Description And Theory Of Operation

Maintenance Forms, Records and 0001 00-3 Reporting Equipment Improvement 0001 00-3 Destruction of Materiel to Prevent Enemy use WP 0001 00-3 Preparation for Storage and 0001 00-3 Official Nomenclature, Names, and Designations WP 0001 00-4 Equipment Description and 0002 00-1 Equipment Characteristics, Capabilities, and Features WP 0002 00-1 Location and Description of Major 0002 00-1

Warning

M240b Machine Gun Sections

Before starting an inspection, be sure to clear the weapon. Do not actuate the trigger until the weapon has been cleared. Inspect the chamber to be sure that it is empty. Check to see that there are no obstructions in the barrel. All small arms systems must be inspected and or gaged at least once annually for safety and serviceability. Guard and reserve weapons are to be gaged and inspected at least every two years after initial gaging unless usage, deployment or other maintenance indicates...

Disassembly cont

Kpv Machine Gun Manual

Separate the bipod leg spring 5 and bipod legs 6 from the tripod head 4 . Rotate the bipod head 4 90 degrees, so the split pin 7 inside the hollow cylinder 8 is exposed. Use a punch to remove the split pin from the hollow cylinder and discard pin 7 . Using a screwdriver, push in and turn the bipod head plug 9 1 4 turn until the tangs are aligned with the grooves on the hollow cylinder 10 . The plunger and spring will push the plug out of the head.

Unit Maintenance Of Trigger Housing Assembly Mbmgmn Nsn Pn

Cleaning Inspection Repair c. Reassembly INITIAL SETUP Tool Kit, Small Arms Repairman, PN SC 5180-95-B71 SL-3-08724A Marine Corps only SL-3-00607A Marine Corps only Bar laundry soap item 14, WP 0074 00 Cleaner, lubricant and preservative CLP item 1, WP 0074 00 item 2, WP 0074 00 Weapons lubricating oil as required Wiping rag item 11, WP 0074 00 Trigger housing assembly removed from receiver TM 9-1005-313-10 .

Cover Detent Plunger M240b

M240 Assemble Disassemble

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...

M240 Feed Pawl Assembly

M240 Feed Pawl

Install feed pawl assembly 12 on feed pawl pivot post 13 in cover 15 . Be sure feed pawl roller 17 is in well behind feed pawl assembly 12 . Secure retaining ring 11 in place on feed pawl pivot post 13 . Install two helical compression springs 10 on spring guide posts 13 in cover 15 .

Chapter Supporting Information

M240 Machine Gun

0041 00 Repair Parts and Special Tools List, Unit and Direct Support General WP 0043 00 Repair Parts and Special Tools List, Unit and Direct Support for Buffer Assembly M240 M240C Buffer and Spade Grip Buttstock and Hydraulic Buffer Assembly M240B M240N and Buttstock and Buffer Assembly M240G WP 0049 00 Trigger Housing Assembly M240 M240C M240D M240E1 and Trigger Housing, Infantry M240B M240G M240N WP 0053 00 Repair Parts and Special Tools List, Unit and Direct Support for cont Rear Sight...

Using Firing Pin Protrusion Gage To Measure Firing Pin Protrusion

M240 Major Component

The first step in using the firing pin protrusion gage 27 is to function check the machine gun. The bolt and operating rod must go forward freely to firing position when trigger is pulled. Safety 7 must be in F position. Release barrel locking latch 3 and turn barrel release latch 2 to upright position and remove barrel assembly 4 from receiver 13 . Point receiver 13 upward with buffer 12 resting on a work surface. Insert firing pin protrusion gage 27 in receiver 13 . Seat the bottom end of...

Caution

Be sure headed straight pin 9 does not stick into channels of the backplate 24 . Install back plate latch 10 with helical compression spring and detent plunger into backplate 24 . Align holes in backplate 24 and back plate latch 10 . Install headed straight pin 9 from right to left smooth end of pin is installed first . Place backplate 24 with threaded end up on a clean surface. Place sleeve spacer 20 into buffer plug 23 . Install braking buffer cone 22 with its base against buffer plug 23 ....

M240n Machine Gun Condition

M240 Disassembled

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

Cleaninginspectionrepair cont

Check trigger guard 6 and trigger guard pin 5 for cracks or bends. Replace if damaged or missing. Check trigger housing 4 for cracks and elongated holes. If any cracks or elongated holes are present notify direct support maintenance Marine Corps repair at unit maintenance . Check grips 2 and 3 for cracks. If cracked replace the grip. Check for presence of two grip screws 1 , replace if missing.

Disassembly Of The M240 Machine

M240b Disassembly

Remove cap screws 1 and lock washers 2 from rails 3 and body 4 . Discard lock washers 2 . Remove rails 3 and insulators 5 . UNIT 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 _ M240B M240G Using a hammer and punch, drive the bipod retaining pin 6 out of the receiver 7 . Remove front sling swivel 8...

M240b Bipod Latch Installation

M240 Bipod

Perform next step only if cap 10 and spring pin 11 were removed. Install latch cap 10 onto barrel latch 36 . Drive new spring pin 11 through cap 10 to retain to latch. M240B M240G Reattach the bipod leg assembly 9 to the receiver 7 by aligning the gaps in the bipod head 35 with the flanges on the receiver 7 . Swivel the bipod assembly 9 so it is in the upright position. M240B M240G Insert front sling swivel 8 into position from the left side of receiver. Use a punch and hammer to install the...