Manual

CHAPTER III
ORGANIZATIONAL MAINTENANCE
Section I
3- 1.
REPAIR PARTS, TOOLS AND EQUIPMENT.
3-2. GENERAL.
INSTRUCTIONS
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3-t>.
This chapter lists repair parts, common t!)ols and equipment and special tools and equip-
ment.
3-4. REPAIR PARTS (2nd Echelon)
PART NO.
DESCRIPTION
OUANTITY
2666-A
Extractor
29
2671-C
Firing Pin
3
2673-B
Take Down Pin, Bolt
3
2668-A
Spring, Extractor
29
2715-C
Spring, Firing Pin
3
2678-A
Spring, Operating Rod
2
3’ . -9.
ACCESSORIES AND SPECIAL TOOLS. Accessories and Special Tools are tabulated in
Table 3-4.
Section 2
3-6. LUBRlCATION.
3-i.
GENERAL. The rifle should be cleaned and lubricated at the end of each day’s use, or
when exposed to an excessive amount of dirt, gInit, or other foreign matter and//or water. The
rifle should not generally be fired beyond 200 rounds without being cleaned, although, under
normal condition:;, the rifle can be expected to perform reliably up to approximately 1,000
rounds without cleaning. For best continued operation, all surfaces should be protected by a
very light film of’ oil, except under sub-zero temperatures all oil should be removed from mov-
ing components. The rifle can function completely dry, although lack of lubricant is undesir-
able, due to resultant excessive wear. NOTE : Keep the gas piston clear of excess oil to prevent
earl\- formation of carbon.
3-8. CLEANING AND LUBRICATION AFTER FIRING.
3-9. CLEAKISG AND LUBRICATING THE BARREL.
a. Attach the wire brush to the Cleaning rod, dip in solvent cleaning compound and brush
the bore thoroughly. Do not submerge barrel in cleaning solution. The gas piston should not be
allowed to fill with oil. Brush the bore from chamber to muzzle, using straight-through strokes.
NOTE
Do not reverse direction of brush
while in bore.
Push the brush through the bore until it extends beyond the muzzle. Continue until the bore is
well covered with solvent. Remove the brush from the rod, and dry the bore by pushing through
clean, dry patches. Continue until patches come out clean and dry.
b. Clean the locking lugs in the barrel extension, just to the rear of the chamber. Brush
the lugs with a small brush.
c. After cleaning, lubricate the bore with a lightly oiled patch to prevent corrosion and
pitting. Lightly oil the lugs in the barrel extension.
d. Remove the individual component parts of the operating rod. Wipe clean with oil-
soaked patches. Use the cleaning rod with the brush to clean the gas piston. Remove any excess
oil. See Figure 2-6.
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