General Repair And Rebuild Methods

a. The foreman in charge of repair and rebuild will procure a complete set of special tools- The number of units to be processed will determine the disposition of manpower and job procedure, and the extent to which improvised tooling, assembly line methods, and special shop provisions are justifiable.

b. Precision tools for inspection of critical dimensions and tolerances will be provided where necessary.

c. Use only tools that fit snugly as loose fitting tools may damage part.

d. It is the responsibility of personnel engaged in disassembly to inspect parts as they are removed. Irreparable parts should be dropped from flow of parts as soon as possible.

& Parts damaged to the extent that the cost of repair is greater than their replacement cost, should be discarded.

REMOVAL OF RUST AND FINGERPRINT DEPOSIT

a. Light rust may generally be removed with a cloth moistened with preservative lubricating oil or rifle-bore cleaner. If this does not suffice, use crocus cloth or fine abrasive cloth. Take care not to scratch or alter cleaned surfaces, to remove thoroughly all dirt and abrasive, and to reoil surfaces before assembling the parts.

b. For removal of deposits caused by the acid reaction of the fingerprint on the metal of un-painted machined surfaces, use fingerprint remover oil 14-C-789-25.

REMOVAL OF BURRS FROM THREADS, SCREW HEADS, AND WORKING AND WOODEN SURFACES

a. During the life of the carbine, polishing and stoning are necessary to relieve friction and to remove burrs set up by firing and usage. Remove burrs on screw heads, threads, and like surfaces with a fine file, or chase out with a corresponding sized die or tap. Remove burrs on working surfaces, such as bolt lugs, operating slide grooves, etc., with a fine grain sharpending stone. Smooth rounded contacting surfaces with crocus cloth.

Caution: Be careful to stone and file evenly and lightly and do not remove more metal than is absolutely necessary. Never alter parts or assemblies in any way that will affect interchangeability or proper operation or function. If parts are so damaged that critical dimensions would be changed by filing or stoning, replace with a part from stock.

b. On wooden components, dents or mutilations that do not affect strength or general appearance may be sanded out. Wood dough may be used if practicable- Unvarnished wooden components, such as stocks and hand guards, should be sanded all over and treated with linseed oil, mixed with an approved fungicide if inspection reveals presence of fungus. Patching is permitted where strength is not affected. See page 93 for repairs and patching of wooden components. Points that bind may be relieved by filing or paring using a fine file or sharp flat blade.

REPLACEMENT OF SPRINGS

All springs that are corroded, set, weak, distorted, or fail to meet standards are to be replaced. Refer to TB ORD 366 for coil spring standards.

MARKING OF REBUILT WEAPONS

All carbines rebuilt must be stamped with the initials of the rebuilding establishment in the United States; weapons rebuilt by oversea depot shops are not to be stamped. Stamp the initials identifying the establishment rebuilding a carbine on the left side of the stock between the hand grip and the butt plate. If the weapon is subsequently rebuilt at another establishment, place the new identifying initials directly below those preceding. If the weapon is rebuilt at the same establishment as before, new initials need not be added- The establishments and the initials to be used are as follows:

Augusta Arsenal A A

Benicia Arsenal BA

Mt. Ranier Ordnance Depot MR

Raritan Arsenal RA

Red River Arsenal RRA

Rock Island Arsenal RIA

Springfield Armory SA

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