TO 11W1-12-4-32 Gun_Cleaning.pdf

AMS-C-83873 cleaning compound is acceptable for weapons parts requiring degreasing and cleaning. The jet washing machine must have a clean water rinse and drying cycle following the wash cycle. The complete washing, rinsing, and drying process shall not exceed 10 minutes. The temperature and pressure of the jet washing machine for use on the parts shall not exceed 200 degrees Fahrenheit (°F) and 80 Pounds-force per Square Inch (PSI), respectively. To avoid flash corrosion, parts should be dried, (either air dried or towel dried), upon removal from jet washer. Subsequently, parts should be lubricated in accordance with the appropriate TO.

b. Washing weapons parts by hand using cleaning compound AMS-C-83873 or MIL-C-87937, Type II followed by clean water rinse and drying is an alternate method of cleaning gun parts.

c. Muzzle clamp, center clamp, stub rotor may be cleaned using MIL-P-85891 plastic bead media as an alternate method of cleaning. Use 40 to 60 PSI air pressure.

5.1 Ultrasonic Requirements.

BRULIN FORMULA, 815GD 13

Do not install plastic or any other nonmetallic parts in the ultrasonic parts washer. Nonmetal parts may become damaged during cleaning.

5.1.1 Ultrasonic washer is purchased commercially and must meet the following requirements. Cleaning tank is designed to hold cleaning solution and provide ultrasonic cleaning and agitation for cleaning of components, a separate tank is for clean water rinse. The dynamic processing machine must have variable sweep frequency capability and provide a water rinse with optional drying module following each wash/rinse cycle. Ultrasonic watt density shall not exceed 40 watts/gallon.

5.1.2 The temperature of the filtered washing and rinsing solution shall not exceed 160 °F and the self-heated, high volume air drying module using air knives shall not exceed 200 °F. Adjustable heat and time settings for both tanks are required.

5.1.3 Solution of Brulin Formula 815GD, product number 301007 will be mixed in an approximate 5 ounce solution to 1 gallon of water. Set wash tank to 160 °F and rinse tank to 140 °F. If difficulties are observed, then the cleaning times could easily be adjusted. The times and settings should be repeatable and adjustable.

5.2 Cleaning Cycle. Wash processing time shall not exceed 10 minutes per part per cleaning operation, limited to 30 minutes (3 cycles) for excessively soiled gun parts per cleaning operation. Parts shall not be allowed to contact the sides or bottom of the processing vessels. After cleaning, parts should be lubricated in accordance with TO directives after process-ing. The cleaning cycle is 10 minutes total time with the following settings:

• 135 seconds ultrasonic cleaning.

• 60 seconds agitation/spray.

• 135 seconds ultrasonic cleaning.

• 60 seconds agitation/spray.

• 135 seconds ultrasonic cleaning.

• 60 seconds agitation/spray.

5.3 Rinse Cycle. Rinse cycle should be 5 minutes in clean tap water.

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1247708495N Highlight

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5.4 Drying.

If using compressed air for cleaning equipment, keep the air pressure as low as practical but limit air pressure to less than 30 PSI. Also, ensure the nozzle discharge tip is a diffuser type. Compressed air will not be used to blow chips or other debris from a worker’s body or clothing. Effective chip guarding (nozzle discharge tip is a diffuser type) and personal protective equipment will be used. Also, to prevent flying chips and particles from striking the eyes and skin of the operator and bystanders, screens, barriers, or protective cones will be used.

Drying shall be accomplished by subjecting components to a blast of prepared dry and clean low-pressure compressed air not to exceed 30 PSI or by wiping surfaces of components with a clean, dry lint-free cloth, MIL-C-85043.

5.5 Hard Carbon. Hard carbon may be removed from metallic surfaces not having a protective finish by wire brushing the part.

5.6 Powder Residue.

BORE CLEANER, RIFLE, MIL-PRF-372 5

Surfaces subject to powder residue shall be scrubbed clean using nonmetallic bristle brush saturated with rifle bore cleaner, MIL-PRF-372, prior to cleaning in accordance with this paragraph. Parts normally subjected to burned powder include the muzzle clamp, rear housing, breech bolts, rotor tracks and rotor.

5.7 Metallic Surfaces.

SOLVENT, DEGREASING, MIL-PRF-680, TYPE II OR TYPE III 4

Components shall be cleaned in accordance with Table 2. Solvent recirculating systems shall be filtered to remove contami-nation.

5.7.1 Cleaning shall be accomplished by complete immersion, where possible, accompanied by such scrubbing and agitation as may be necessary to accomplish thorough cleaning; or by scrubbing or wiping with clean brush or a cloth soaked in degreasing solvent MIL-PRF-680, Type II or Type III, accompanied by partial immersion when possible or by pressure spray.

NOTE

External barrel corrosion should be controlled as much as possible, however, external corrosion alone will not be a cause for rejection, as it does not affect the barrel function.

5.8 Barrels.

BORE CLEANER, RIFLE, MIL-PRF-372 5

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