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CHAPTER 3
DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
CHAPTER OVERVIEW
This chapter contains information and instructions for the repairman to keep the machine gun in good repair. This chapter consists of repair parts; special tools; common tools and equipment; fabricated tools; troubleshooting; maintenance procedures; and final inspection. This chapter also contains information and instructions regarding preparation for storage and shipment, and pre-embarkation inspection of material.
Section I. REPAIR PARTS, SPECIAL TOOLS, COMMON TOOLS AND EQUIPMENT AND FABRICATED TOOLS
3-1. REPAIR PARTS. Repair parts are listed and illustrated in the repair parts and special tools list (app C) covering unit and direct support maintenance for this equipment.
3-2. SPECIAL TOOLS. Tools and test equipment are listed in appendix B.
3-3. COMMON TOOLS AND EQUIPMENT. For authorized common tools and equipment, refer to Modified Table of Organization and Equipment (MTOE) applicable to your unit.
3-4. FABRICATED TOOLS. Fabricated tools are listed and illustrated in appendix E.
Section Il. TROUBLESHOOTING
3-5. DIRECT SUPPORT TROUBLESHOOTING. Refer to troubleshooting table for malfunctions, tests, and corrective actions (para 2-8, pg 2-11).
Section Ill. MAINTENANCE PROCEDURES
NOTES
All assemblies/subassemblies will be clean prior to inspection and repair.
When a machine gun is received at direct support maintenance, all gaging requirements must be checked as a standing maintenance procedure. In addition, the weapon must be inspected and any other deficiencies found will be repaired, and noted for repair at the appropriate maintenance level. Weapons 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 once every two years after initial gaging unless usage, deployment or other maintenance indicates a need for more frequent inspection/gaging. It is recommended that training unit weapons be inspected/gaged after every training cycle. Regardless of weapon ownership, initial gaging/inspection will be one year after receipt of new or overhauled weapons. The appropriate interval starts at this time.
Burrs or raised surfaces may be removed or smoothed using a fine grit sharpening stone or crocus cloth (item 5, app D). DO NOT change the dimensions of any component by stoning. Cracks, chips, dents or gouges on components shall be reported to the appropriate maintenance level for repairs or replacement.
All assembly/subassembly parts will be lightly lubricated with Cleaner, Lubricant, and Preservative (CLP) (item 1, app D) prior to assembly unless otherwise specified.
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This task covers: Disassembly/Inspection/Repair/Reassembly | |
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INITIAL SETUP | |
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Tools and Special Tools |
References |
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Tool Kit, Small Arms Field Maintenance |
TM 9-1005-201-10 |
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Tool Kit, Small Arms Repairman | |
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USMC TAM No. E2900 |
Materials/Parts |
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Cleaner, Lubricant, and Preservative (CLP) | |
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(item 1 app D) | |
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Personnel Required |
Solid Film Lubricant (item 7, app D) |
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MOS 45B Small Arms Repairer |
Masking Tape (item 8, app D) |
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MOS 2111 Infantry Weapon Repairer |
Wiping Rags (item 3, app D) |
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(USMC) | |
DISASSEMBLY/INSPECTION/REPAIR/REASSEMBLY
WARNING
Make certain weapon is cleared and that there is no obstruction in the barrel or chamber (to include spare barrel).
1. Field strip weapon in accordance with TM 9-1005-201-10/TM 08671A-10/1A.
2. Visually inspect assemblies for damage.
3. Repair assemblies as required in accordance with chapters 2 and 3 of this manual.
4. Touch-up external surfaces (surfaces should not reflect light) as required, using Solid Film Lubricant (item 7, app D). Mask off areas that do not require touch-up, using Masking Tape (item 8, app D).
5. Lightly lubricate all metal surfaces of components, using CLP (item 1, app D) and Wiping Rags (item 3, app D), except as noted.
6. Reassemble in accordance with TM 9-1005-201-10/TM 08671A-10/1A.
WARNING
Barrels (to include spare barrel) and Bolts must NOT be interchanged with other M249 Machine Guns unless they have been checked for proper headspace.
HEATSHIELD ASSEMBLY
HEATSHIELD ASSEMBLY
BUTTSTOCK AND SHOULDER ASSEMBLY COVER & FEED 0R BUTTSTOCK/BUFFER MECHANISM ASSEMBLY OR STOCK, GUN, SHOULDER:M5 P. 3-16.1
GAS CYLINDER ASSEMBLY
SLING AND SNAP HOOK ASSEMBLY
GAS CYLINDER ASSEMBLY
SLING AND SNAP HOOK ASSEMBLY
RETURN ROD AND TRANSFER MECHANISM ASSEMBLY AND DRIVE SPRING.
TRIGGER MECHANISM ASSEMBLY P. 3-18
RETURN ROD AND TRANSFER MECHANISM ASSEMBLY AND DRIVE SPRING.
TRIGGER MECHANISM ASSEMBLY P. 3-18
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This task covers: Cleaning/Inspection/Repair | |
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INITIAL SETUP | |
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Materials/Parts |
References |
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Cleaner, Lubricant, and Preservative (CLP) |
TM 9-1005-201-10 |
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(item 1, app D) |
TM 08671A-10/1A |
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Wiping Rag (item 3, app D) | |
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Inspection Penetrant (item 6, app D) | |
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Personnel Required |
Equipment Condition |
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MOS 45B Small Arms Repairer |
Bolt Assembly removed. |
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MOS 2111 Infantry Weapon Repairer |
and disassembled. |
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(USMC) | |
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