Specifications

TM 05539-IN
0008 00-1
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
INCLUDING LUBRICATION INSTRUCTIONS 0008 00
GENERAL
This work package contains inspection, disassembly and reassembly procedures required for corrective maintenance on
the M40A3/A5 Sniper Rifle.
1. Organizational Maintenance
. Organizational Maintenance is performed at the using unit beyond the capabilities of the
operator as identified in TM 05539-OR_. Organizational Maintenance is authorized to remove the firing pin assembly
from the bolt body assembly and the receiver assembly from the stock for the purpose of inspecting, repairing or clean-
ing. The Repair Parts List (RPL) in WP 0035 00 contains Organizational Maintenance special tools. For all other
inspections and repairs, evacuate the M40A3/A5 Sniper Rifle to the Intermediate Maintenance Activity (IMA).
2. Special Tools
. The Repair Parts List (RPL) contains the special tools required in the small arms technician’s toolbox. A
qualified MOS 2112 (Precision Weapons Repairman) will replace weapon components. Either a qualified MOS 2112 or
a MOS 2171 (Optical Instrument Repairman) may repair and replace the telescope.
3. Intermediate Through Depot Maintenance
. Intermediate Maintenance repairs include the total replacement of the
telescope, the telescope optical platform, the trigger assembly, the bolt stop, and the safety selector lever. Higher level
maintenance will be done by a MOS 2112. Depot Maintenance is performed by Weapons Training Battalion, Quantico,
VA, which also functions as the weapons rebuild facility. Weapons Training Battalion is responsible for rebarreling the
weapon, replacing the stock assembly, and replacing the bolt body assembly.
PREVENTIVE MAINTENANCE PROCEDURES
1. Organizational Preventive Maintenance Checks and Services
. Perform PMCS every 90 days to keep the weapon in
proper operating condition, in accordance with the Quality Assurance Checklist in WP 0033 00 of this manual. If the
weapon has not been used in 90 days, consider placing it in storage according to instructions outlined in TM 05539-
OR_. If rust is observed on a weapon, perform PMCS immediately.
2. Inspection
. Perform the following inspections in accordance with TM 05539-OR_. Field strip the weapon; inspect all
parts for cracks, dents, burrs, excessive wear, rust, or corrosion; and ensure all items are cleaned and lubricated. Evacu-
ate the weapon to higher level of maintenance if repairs are not authorized at the Organizational Maintenance level. See
Source, Maintenance, and Recoverability (SMR) codes in WP 0035 00, Repair Parts List (RPL).
The using unit is responsible for organizational preventive maintenance. The phase consists of inspecting, servicing,
lubricating, and adjusting parts.
CLEARING/UNLOADING THE WEAPON
WARNING
• Ensure fingers are outside the trigger guard. Keep the weapon pointed in a safe direction at all times.
• After unloading the weapon and with the bolt open, visually and physically check the chamber for
ammunition.
• Always assume every weapon is loaded until it is determined through visual and physical inspection that
it is not. Procedures for clearing/unloading the weapon are outlined in TM 05539-OR_.
• Failure to follow these warnings may cause injury or death to personnel.
FIELD STRIPPING THE WEAPON
The weapon is field stripped into three major groups to clean, inspect and repair. The groups are the bolt assembly, bar-
rel and receiver assembled into the stock assembly (A5 models also include the suppressor), and magazine assembly. Proce-
dures for field stripping the weapon are outlined in TM 05539-OR_.
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