32. Bayonet, M1 (fig.78)
a. Inspection. (1) As a unit (fig. 78). Inspect the
bayonet as a unit for appearance and general condition, fit, and positive
retention on rifle, and looseness of components.
(2) Individual parts (fig. 79). Inspect blade for deformation,
broken or nicked point, nicked or burred blade edge, unserviceable
dullness, and burs. Inspect lug ways in handle for wear, dents, burs, and
foreign matter. Examine the scabbard catch well for foreign matter. Check
the guard for burs, deformation, deformed or dented barrel band, loose fit
on barrel when mounted, looseness on blade, and loose or missing rivets.
Inspect the bayonet scabbard catch slot for deformation and burs. Check
the catch for functioning, free action in well, worn or burred hook, worn
knurling, looseness in bayonet catch slot, and for burs. Test spring
tension; free length of catch spring (B147063) is 0.0475 to 0.030 inch.
Inspect the grips for cracks and protrusion over the edge of the blade
handle. Examine the grip screw and escutcheons for looseness, wear,
projection above grips, and burs.
b. Maintenance And Repair. (1) Nicks and burs. Smooth
the nicks and burs on metal parts of the bayonet with a fine-grained
sharpening stone. Keep the point of the blade serviceably sharp. Dents in
the edges of the blade can often be peened out before smoothing.
(2) Loose rivet in guard. Peen rivets or, if necessary, punch out
and replace with new rivets and peen; file heads flush with a fine, flat
file. Take care not to make a shiny spot on the guard, which may reflect
light.
(3) Worn lug ways. When lug ways are worn enough to make the
bayonet fir loosely on the rifle, peen the ways sufficiently to make a
secure fit. Peen lightly and fit the bayonet to the lug frequently during
the process.
(4) Cracked grips. If grips are cracked or escutcheon loose,
replace the grips.
(5) Bayonet catch. The bayonet catch (fig. 79) should operate
freely and with good spring action. Test it to be certain that the bayonet
is positively held on the rifle and in the scabbard.
(6) Repointing. Bayonets that have had their points broken off are
being repointed and made serviceable by ordnance repair shops. The
following is the preferred method of grinding and the minimum length to
which the blade of the bayonet may be repointed and still be serviceable
for issue:(a) In order to avoid drawing the temper, blades of bayonets,
bayonet knives, or trench-knives which require repointing will be ground
only on a water cooled stone. Make no attempt to reheat-treat the blades
after the repointing operation. Where required, refinish shiny blades by
penetrating, parkerizing, or parco-lubriting.
(b) After final grinding and finishing operations, the bayonet blade,
measured from the front of the guard along the blade to the point, will
not be less than 8 3/8 inches.
33. Bayonet Scabbard, M7 (fig.78)
a. Inspection. (1) As a unit. Inspect the
scabbard as a unit for appearance, general condition, fit and retention of
bayonet, ease of bayonet withdrawal, and looseness of components.
(2) Individual parts. Check the body for cuts, deep abrasions, or
splitting. Examine the top of the mouthpiece for wear, burs, or looseness
in the body. The hook is not to be deformed, worn, or burred. Insert the
bayonet in the scabbard and be certain that either latch hook on the
mouthpiece will engage positively with scabbard catch on bayonet.
b. Maintenance And Repair. (1) Nicks and burs. Remove
nicks and burs on top of the mouthpiece with a smooth file. Use a flat
file with a safe edge for flat surfaces and a rat-tailed file for inside
curved surfaces.
(2) Top plate loose in body. If either hook on mouthpiece will not
positively engage the scabbard catch on the bayonet, it may be fitted by
filing the forward face of the hook slightly. Be certain to file level. Do
not file scabbard catch unless burred or worn unevenly.
34. Gun Sling, M1907 (fig. 80)
a. Inspection. (1) As a unit. Inspect gun sling,
M1907 as a unit for appearance, general condition, flexibility, and
functioning of hooks, loops, and keepers.
(2) Individual parts. Inspect straps for condition of leather,
weakness, ripped stitches, cuts, and abrasions. Examine hook holes for
wear and breaks between holes. Inspect for tears at rivets, and wear and
cracking at loops. Leather straps should not crack when bent around a
1-inch bar. Check the hooks for deformation, pinching, and burs, the
rivets for looseness, and the loops for deformation and burs. Examine
sliding metal keepers for looseness on straps and for pinching.
Note. If sliding keepers are of leather, check for ripped
stitches.
b. Maintenance And Repair. (1) Dried out leather.
When the straps become dried-out, as indicated by light cracking or
stiffness, clean them thoroughly with saddle soap to help condition the
leather. Work a thick lather of soap well into the leather and rinse off
with water. Polish briskly with a dry, clean wiping cloth. If this
treatment does not soften the leather, apply a very light coating of
Neat's-foot oil.
(2) Scratches and gouges. When straps become rough from leather
"picked up" by scratches, cuts, or gouges, smooth them by paring lightly
with a sharp, flat blade.
(3) Bent sliding loops and hooks. When (metal) sliding loops or
hooks become spread or pinched, they should be corrected. Loops may be
spread by placing a piece of flat metal between loop and strap and using a
light-weight hammer.
(4) Worn holes in straps. When holes in straps become worn or
leather is torn between the holes, replace the strap. Punching new holes
will weaken the strap. 35. Gun Sling, M1 (fig.80)
a. Inspection. (1) As a unit. Inspect the gun sling
as a unit for appearance, general condition, functioning of keeper buckle,
and security of hook when assembled to rifle.
(2) Individual parts. Examine the body (webbing) for cuts, chafing,
or weak spots, and indications of rotting. Inspect the clip on the end for
cracks or insecurity. Check hook for cracks or spreading; it should snap
onto butt (sling) swivel of rifle and be firmly retained. Inspect loop and
buckle for deformation, burs, and cracks. Check keeper assembly for dents,
cracks, and positive retention on body when locked.
b. Maintenance And Repair. As this sling is made of webbing, repair
is not usually practical; therefore, if badly damaged, replace it as a
unit. 36. Flash Hider, M2 (fig. 81)
a. Inspection. (1) As a unit. Inspect the flash hider
as a unit for appearance, general condition, and fit and retention on
rifle. Flash hider should fit snugly on end of barrel and lock positively
in position.
(2) Individual parts. Inspect slot in bracket for burs and wear,
latch for deformation, looseness on bracket hinge pins, and worn locking
lugs. Inspect cone for deformation and looseness on bracket.
b. Maintenance And Repair. When the latch fails to lock on
bracket, this condition may be due either to worn locking lugs or the
latch being sprung out, thus preventing the locking lugs from functioning.
Both conditions may be corrected by positioning the latch in a vise so
that the jaws clamp at the locking lugs and then tightening the vise until
the latch is sprung in sufficiently to give a positive locking action on
the bracket. 37. Grenade Launchers, M7 and M7A1 (figs.
82
and 83)
a. Inspection. (1) As a unit. Inspect grenade
launchers as a unit for appearance, general condition, and fit and
retention on rifle. Launcher should fit snugly on end of barrel and lock
positively in position. Inspect protrusion of spring beyond outside
diameter of sleeve. It should protrude .007 to .011 inch. If the spring is
deformed so that it protrudes more than .011 inch or worn to a point where
it protrudes less than .007 inch, replace.
(2) Individual parts (grenade launcher, M7). Inspect sleeve for
burs, deformation, foreign matter inside tube, and looseness on bracket.
Inspect stud for wear and burs. Inspect latch for deformation, wear on
locking lugs, and for looseness on bracket hinge lugs.
(3) Individual parts (grenade launcher, M7A1). Inspect individual
parts as outlined in (2) above with the following additions: Inspect
plunger for burs and for function in slot in body. Inspect spring for
function, fracture, and set. Free length of spring (B7313331) is
approximately 1.400 inches. Inspect spring aperture in body for burs and
foreign matter.
b. Maintenance And Repair. (1) Latch fails to lock on bracket.
Refer to paragraph 36b for correction.
(2) Remove burs with fine-grained sharpening stone or fine, flat file.
Remove rust or foreign matter from inside of sleeve with rifle bore
cleaner and bore brush. |
