Care Of Telescopic Sight

a. Care, cleaning, and oiling of the telescopic sight used on the Rifle M1903A4 is explained in detail in TM 9-270.

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Care of materiel in below freezing temperatures 61

Care of materiel under extreme high temperatures 62

Cleaning materiel received from storage 63

Preparing materiel for storage 64

Packing materiel for shipment or storage 65

Defense against chemical attack, and decontamination of materiel 66

61. CARE OF MATERIEL IN BELOW FREEZING TEMPERATURES, a. Special care, cleaning, and lubrication of the rifle is necessary for its proper functioning when low temperatures are encountered In temperatures below freezing, it is necessary that the moving parts of the rifle be kept absolutely free of moisture. It has been found that excess oil on the working parts will solidify to such an extent as to cause sluggish operation or complete failure.

b. Upon being brought indoors, the rifle should first be allowed to come to room temperature. It should then be disassembled, wiped completely dry of the moisture which will have condensed on the cold metal surfaces, and thoroughly oiled with OIL, lubricating, preservative, special. Oiling is best done by wiping with a clean cloth, dampened with oil and well wrung out. If the rifle has been fired, it should be cleaned as described in paragraph 59.

c. If possible, condensation should be avoided by providing a cold place in which to keep rifles when not in use; for example, a separate cold room with appropriate racks may be used or, when in the field, racks under proper cover may be set up outdoors.

d. Before use, the metal parts of the rifle should be disassembled and completely cleaned with SOLVENT, dry-cleaning. The parts should then be completely dried with clean, dry, lintless CLOTH, wiping, and lightly oiled with OIL, lubricating, preservative, special, and again wiped dry. SOLVENT, dry-cleaning, removes every trace of oil and grease, hence metal is susceptible to quick rusting and should not be handled with bare hands until oiled. The working surfaces and parts which show signs of wear may be lightly lubricated by wiping with a cloth which has been saturated with OIL, lubricating, preservative, special, and then wrung out.

e. Care of the telescopic sight used on the Rifle M1903A4, is explained in TM 9-270, f- The bayonets used with the rifles should be cared for in a similar manner, but may be kept lightly oiled at all times with OIL, lubricating, preservative, special. The metal parts of bayonet scabbards should be cared for in like manner,

62. CARE OF MATERIEL UNDER EXTREME HIGH TEMPERATURES.

a. Hot, Humid Areas.

(1) Where temperature and humidity are high, where salt air is present, or during rainy seasons, the weapon should be thoroughly inspected daily and kept lightly oiled when not in use. The groups should be dismounted at regular intervals and, if necessary, disassembled sufficiently to enable the drying and oiling of parts.

(2 ) Care should be exercised to see that unexposed parts and surfaces are kept clean and oiled, and rifles should be inspected frequently.

(3) OIL, lubricating, preservative, medium, should be used for oiling and lubrication.

(4) Wood parts should also be inspected to see that swelling due to moisture does not bind working parts. (In such cases shave off wood only enough to relieve binding.) A light coat of raw linseed oil applied at intervals and well rubbed in with the heel of the hand, will help to keep moisture out Allow oil to soak in for a few hours and then wipe and polish wood with dry, clean CLOTH, wiping.

NOTE: Care should be taken that linseed oil does not get into the mechanism or on metal parts, as it will become gummy when dry. Stock and hand guard should be dismounted when this oil is applied b. Hoi, Dry Areas*

(1) In hot, dry areas where sand and dust are apt to get into the mechanism and bore, the weapon should be wiped clean daily, or oftener, if necessary. Groups should be dismounted and disassembled as far as necessary to facilitate thorough cleaning.

(2) When the weapon is being used under sandy conditions, all lubricant should be wiped from the weapon- This will prevent sand carried by the wind from sticking to the lubricant and forming an abrasive compound which will ruin the mechanism. Immediately upon leaving sandy terrain, the weapon must be thoroughly cleaned and relubricated with OIL, lubricating, preservative, special.

(3) In such climates, wood parts are apt to dry out and shrink, and a light application of raw linseed oil applied as in subparagraph a (4), above, will help to keep wood in condition.

(4) Perspiration from the hands is a contributing factor to rust because it contains acid, and metal parts should be wiped dry frequently.

(5) During sand or dust storms, rifle should be kept covered, if possible, the breech and muzzle especially.

c. Care of the telescopic sight used on the Rifle M1903A4 is explained in TM 9-270, d* The bayonets and bayonet scabbards used with the rifles should be cared for in a similar manner, and frequently inspected for rust

63. CLEANING MATERIEL RECEIVED FROM STORAGE.

a* Rifles which have been stored in accordance with paragraph 64, will be coated with either OIL, lubricating, preservative, light; OIL, lubricating, preservative, medium; or COMPOUND, rust-preventive, light or heavy. Completely disassemble rifle and use SOLVENT, dry-cleaning, to remove all traces of the compound or oil, particular care being taken that the bore, chamber, and all recesses in which springs or plungers operate are cleaned thoroughly. Completely remove SOLVENT, dry-cleaning, from all parts, using clean, CLOTH, wiping. Then oil and lubricate immediately as prescribed in paragraphs 59, 61, or 62, depending upon conditions.

CAUTION: Failure to clean the firing pin, spring, and striker and the tunnel in the bolt in which they operate, may result in gun failure at normal temperatures and will most certainly result in serious malfunctions if the rifles are operated in low temperature areas, as rust-preventive compound and excessive Lubricating oil will congeal on the mechanism.

b. SOLVENT, dry-cleaning, is an inflammable, noncorrosive petroleum distillate, used for removing grease. It should not be used near open fíame and smoking is prohibited when it is being used. It Í9 generally applied by swabbing large parts and as a bath for small parts. The surfaces cleaned must be thoroughly dried to remove the solvent, and then immediately oiled to prevent rusting. To avoid leaving finger marks, which are ordinarily acid and induce corrosion, gloves should be worn by persons handling parts after such cleaning. SOLVENT, dry-cleaning, will attack and discolor rubber. In a emergency, oil, fuel, Diesel, may be used Gasoline is dangerous and prohibited.

c. If SOLVENT, dry-cleaning, or OIL, fuel, Diesel, are not available, a solution of boiling water and issue soap, or SODA ASH may be used. SODA ASH should be used in the proportion of Vz pound to 1 gallon of warm water. The metal parts of the rifle and bayonet should be disassembled and placed in a wire basket and then completely immersed in the boiling solution for about V2 hour. Skim the rust-preventive compound off the top of the water to insure that particles of it will not adhere to the clean components when removed from the bath. Dry parts thoroughly with dry, clean, lintless CLOTH, wiping, wearing gloves during the process. Then oil immediately as prescribed in subparagraph a, above. Care should be used to prevent the solution from getting in eyes, or from prolonged contact with skin. It will attack galvanized and nonferrous metals» For detailed use of the above, refer to TM 9-850. Never use water and lye or any caustic to clean rifles, as it will attack the metal.

NOTE: As SOLVENT, dry-cleaning, or other degreasers completely remove all oil or grease, leaving cleaned surface entirely un protected, metal parts should be immediately oiled or greased, as prescribed herein, according to conditions, to prevent rusting.

d. Great care should be used when removing oil and grease from the telescopic sight used on the Rifle M1903A4. Cleaning should be done with clean, dry wiping cloths. The sight must not be dipped, or SOLVENT, dry-cleaning, used, as liquid may penetrate the joints of the tube or lenses. The exterior of the lenses may be cleaned carefully with ALCOHOL, ethyl or SOAP, liquid, lens cleaning, to remove any oil, or grease, as explained in TM 9-270.

e. Bayonets may be disassembled and cleaned in a similar manner to the rifle. Bayonet scabbards should not be dipped; the oil or grease should be removed by wiping with a clean, dry, wiping cloth.

64. PREPARING MATERIEL FOR STORAGE.

a. OIL, Lubricating, Preservative, Medium. This oil is efficient for preserving the polished surfaces, the bore, and the chamber of rifles for periods up to 1 year, dependent on the climatic and storage conditions. Rifles in short-term storage should be inspected frequently wherever possible and preservative film renewed if necessary. After a copious application or after dipping the rifle in the oil at normal temperature, wrap the rifle in greaseproof paper. This method can be depended upon for the necessary protection particularly if regularly scheduled inspection cannot be undertaken.

b. COMPOUND* Ruel-pre venti ve, Light, This compound is a semisolid materiaL The compound is efficient for preserving the polished metal surfaces, the bore, and the chamber for a period of 1 year or less, dependent on the climatic and storage conditions. It is best applied by reducing compound to a fluid state by indirect heating as explained in subparagraph c, below. The compound can then be applied as described in subparagraph d, below. If heating facilities are not available, the compound can be brushed on at temperature as low as 60 F.

c. COMPOUND, Ruel-preventive, Heavy. This compound is a very viscous petroleum product, used for the protection of finished metal surfaces during dead storage. It may be hpated in a suitable tank so that the parts of the rifle may be coated by dipping. It is inflammable, and precautions must be taken to avoid overheating. The compound must not be heated over an open flame. A practical method for obtaining fluidity is to place container in a vessel of water, heating it to a temperature of about 180 F, the exact temperature being determined by the thickness of the film desired The higher the temperature of the grease, the thinner is the film applied to the metaL The best temperature is that at which the grease is fluid enough to form a uniform film of the maximum thickness which can be retained on the metal in storage. The grease should be heated to the temperature at which used for about half an hour before using. Best results will be obtained if the compound is heated slightly above this temperature and then allowed to cool to the desired consistency before using. During heating, the compound should be stirred to eliminate bubbles of air or water vapor. Presence of water will be indicated by frothing on the top of the bath. For detailed explanation of use and specifications of materials used, refer to TM 9-850 and SNL K-l, respectively.

d. The rifle should be cleaned and prepared with particular care. The bore, all parts of the mechanism, and the exterior of the rifle should be thoroughly cleaned with SOLVENT, dry-cleaning, and then dried completely with clean, dry CLOTH, wiping. In damp climates, particular care must be taken to see that the cloths are dry. After drying a metal part, the bare hands should not touch that part. All metal parts should then be immediately coated either with OIL, lubricating, preservative, medium, or COMPOUND, rust-preventive, light, or COMPOUND, rust-preventive, heavy, depending on the length of storage, the facilities available, and the frequency at which it is anticipated inspection will be made (subpars, a, b, and c, above). Aside from dipping the whole rifle, application of the protective film to the bore of the rifle is best done by dipping the cleaning brush in the preservative and running it through the bore two or three times. (Cleaning brush must be clean.) Before placing the rifle in the packing chest, see that the bolt is in its forward position and that the firing mechanism is released Then handling the rifle by the wooden parts only, it should be placed in the packing chest, the wooden supports at the butt and muzzle having previously been painted with the preservative rust-preventive. Under no circumstances should a rifle contained in a cloth cover or with a plug in the bore, be placed in storage. Such articles collect moisture which causes the weapon to rust To prevent the preservative with which the muzzle and butt are coated from being absorbed by the wooden supports of the chest, seal the muzzle and breech ends with two layers of PAPER, greaseproof, Kraft, wrapping, waterproofed, and secure with TAPE, adhesive, non-hygroscopic.

e. To prepare the bayonet for storage, remove it from the scabbard, disassemble, and clean thoroughly, and apply OIL, lubricating, preservative, medium, or rust-preventive compound to the metal parts, as for the rifle. Do not replace the bayonet in the scabbard. The bayonet should then be wrapped in greaseproof paper, f. The bayonet scabbard should be thoroughly cleaned, but not allowed to come in contact with any oil or grease. The metal parts may be oiled lightly with OIL, lubricating, preservative, medium, and the scabbard then wrapped in greaseproof paper g. Great care must be used when preparing the telescopic sights used on the Rifle M1903A4 for storage. The mount rings should be removed and the sight thoroughly cleaned with clean, dry wiping cloths. A little OIL, lubricating, preservative, medium, may be applied to the cloth if necessary, but care must be taken that the oil does not get on the lenses. The lenses should be cleaned with ALCOHOL, ethyl, or SOAP, liquid, lens cleaning, as explained in TM 9-270, to remove any dirt, oil, or grease. The outside of the sight tube should then be lightly coated with OIL, lubricating, preservative, medium, observing great care that oil does not get on lenses. Such coating should be done with clean, CLOTH, wiping, lightly saturated with the oil used. The sight should then be wrapped in greaseproof and waterproof paper.

h. Leather gun slings should be thoroughly cleaned and then given a coat of OIL, neat's-foot, before storing.

65. PACKING MATERIEL FOR SHIPMENT OR STORAGE.

a. The packing of the rifle and its appendages and accessories, the bayonet and bayonet scabbard, for shipment or storage should be preceded by preparing the materiel as described in paragraph 64 of this manual b. The essential data necessary in the determination of storage space and shipping requirements for this materiel when packed in standard containers are given in SNL B-3 and OSSC B, "Ordnance Storage and Shipment Chart, Group B—Major Items."

e. Instructions for the marking of the outside of packages and items to be shipped to the Ordnance Department or other branches of the U. S. Army, whether from manufacturers or from depots or other military units, will be found in IOSSC-(b), "Introduction to Ordnance Storage and Shipment Charts, Section (b)—Instructions for Marking Shipments of Ordnance Supplies."

66. DEFENSE AGAINST CHEMICAL ATTACK, AND DECONTAMINATION OF MATERIEL.

a. For defense against chemical attack, refer to FM 21-40 listed in paragraph 69.

b. For method of decontaminating materiel subjected to chemical attack, and materials used, refer to TM 3-220, listed in paragraph 69.

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