Refer to table S

TabU S-t. Guide to Maint

Item

B«rwtb1/ Ina talk ton

DtaMMoUr/aaMoAlr

CtanlBi «ad npalr

T«M m4 »djurtattfit»

Not*. For cleaning

Instructions refer

to paragraph 8-Sd.

Firing M«chanl«n

Par 2-8.

Fig. B-3

Par 3-1

Refer to par 3-5 for

efascldng triggsr

poll.

Trigger pin

I, fig. B-3

Par 3-1.

Trigger mid tMr

2, fig. B-3

PlrM,

assembly

Hiniiur spring housing

3, fig. B-8

Per 3-4.

Hammer iprtng

4, flg. B-8

Par 3-2.

Huunw spring plunger

6, flg. B-3

Par 3-8.

Hamntr pin

flg. B-3

Par 3-2.

Himraei

7, flg. B-3

Par 3-3.

Safety

8, flg. b-3

Par 3-1.

Safety spring

9, flg. B-8

Par 3-1.

Trigger guard

10, flg. B-3

Par 8-2.

Soio. If bow and or

fork It oat of

alignment, align

or replace as needed.

Magazine latch

18, fig. B-3

Par 3-2.

Magazine latch spring

14, flg. B-3

Par 8-2a(2).

Trigger bonelng

16, flg. B-3

Par 3-2b.

3-5. Checking Trigger Pull

Check trigger pull with trigger pull measuring fixture 7273758. When using the 4Y2 pound weights (minimum) the trigger should not release the hammer. When using the 7Vfe pound weights (maximum), the trigger should release the hammer (fig. 3-2 and table S-S).

TabU S-S. Correcting Trigger PuU

Mali use bon

ProhAWt c»uif

Cor**ctlYt notion

Trigger pulJ too light

Worn Jug* on trigyer, worn hooks on hammer, worn or damaged •car or weak hammer spring.

Trigger pull excessive

Creep in trigger

Bur» or irregular machined grooves on lugs of trigger or sear, damaged hammer spring, obstruction in the hammer spring housing, or a damaged hammer spring plunger.

Rough contacting surfaces on trigger or sear.

Corr*ct4v«

Note. Do deviate from original configuration.

Suppreesor

TtlGOBt PULL MEASURING FIXTURE -7274758

WE 17108

I SAFETY IN IFORWARD POSITION

tOD FREE AND PARALLEL TO RARREL

Figure S-t. Cheeking trigger pull.

Section IV. MAINTENANCE OF STOCK WITH BUTT PLATE ASSEMBLY (M14 ONLY)

5-6. General

б. Disassembly of the butt plate assembly is not authorized.

TabU 3-4. Guidm to UainUnanc* Functiant

Ittm

Removal/ inaialiatlon

DiêMOMëêmbiy/ asêtmbly

CI toning and rtpair

Tê$t and adju$tm§nt$

Stock sub-MMmbly

1 through 6 flf. B-4

Refer to TM 9-1005-301-30 for repair instruction* on ama'i erme rifle stocks. Insure proper "lock up" between receiver group, evock, and firing mechanism. If binding occurs, remove excess wood. If loose, replace components as rs-qulrsd. Rafer to fig. 3-3 far fitting of butt plate assembly to wooden stocks.

Tighten loose sling swivels by paen-ing the rivets from the Inside of the stock. Place the head of the rivet on a solid block and carefully pasn to prevent overtighten* Ing and ultimata cracking be* twee a the rivets. If "pull through" le Indicated on the exterior of the stock, do not attempt to tighten rivets; the stock Is unserviceable and will be replaced.

Not*. Over hang of butt plate should not be in exceee of 1/92 Inch.

Butt swivel

6, flg. B-4

Para

Butt plate assembly.

7, fig. B-4

Para 3-66

Straighten or replace. Uss Luster-less black paint on aluminum components.

How Paint M14
Figure 3-3. Fitting of butt plat* atttmbly on wooden itoek ouémbly (M14 only).

3-7. Installation of Winter Trigger Kit to Stock Assembly (MX4 Rifle only)

b. Install winter safety, tame as regular safety.

- \ trigger guard

- \ trigger guard

A - PCîITICNINC V. INTER TRIGGER CN £ STOCK ASSEMBLY

M14 Rifle Winter Trigger

hinge st ce*. asfe;/bly f JÎING Mt CM AN ISM'., hinge st ce*. asfe;/bly f JÎING Mt CM AN ISM'.,

A - PCîITICNINC V. INTER TRIGGER CN £ STOCK ASSEMBLY

Hammer Trigger Rifle

stock

C - DRILLING HOLES IN STOCK

stock

HAMMER

HAMMER

Disassembly

LEVER

TRIGGER

8- MARKING LOCATION FOR DRILLING HOLES

LEVER

hlngi :e.nter punch

TRIGGER

8- MARKING LOCATION FOR DRILLING HOLES

C - DRILLING HOLES IN STOCK

M14a1 Rifle

WOOD SCREW

0. V. INTER TRIGGER INSTALLED

WOOD SCREW

0. V. INTER TRIGGER INSTALLED

Figuré 8-4. Installation of u>int§r trigger kit to wooden or fiber glaet «focAt aaeemblie» (M14 only).

Section V. MAINTENANCE OF STOCK ASSEMBLY (M14A1 RIFLE ONLY)

3-8* General a. Refer to table 3-5 of this manual and TM 9-1006-301-30 for repair of wooden and/or fiberglass stocks and related equipment.

b. Disassembly of shoulder rest assembly and hand grip assembly are not authorized.

e. Due to climatic conditions the pistol grip can exhibit a slight movement in the area where it is dovetailed and doweled into the stock body. Perceptible movement in this area will not be cause for rejection; if the stock is otherwise serviceable.

Table $-9. Guide to Maintenants Function*

ItML

R«IBOT*1/ Inatellation

DiauMtBbly/t««RiUy

Ctontnr ud rcpitr

TmU «md *dju»invent»

Stock assembly

Per 2-8.

Par 3-1.

Recoil pad plug

1, fig. B-5

Par 3-2.

Swivel bushing

3, fig. B-5

Par 3-2.

Sling ewlvel

4. fig. B-5

Par 3-2.

Recoil pad

6, fig. B-5

Par 3-2.

Shoulder rest assembly

8, fig. B-5

Par 3-2.

Hand grip assembly

17, fig. B-5

If unserviceable,

Stock

replace.

25, fig. B-5

Par 3-2.

Section VI. MAINTENANCE OF OPERATING ROD AND CONNECTOR GROUP

3-9. General

Refer to table 3-fi.

TabU S-6. Guide to Mainlenanc* Function»

ItMft

Removal/ InaUlUtloo

DlMMtmUy/uMmUy

Cl«ftnla| ind re pear

Tmt* and tdjuatmeoU

Connector assembly

Operating rod and spring guide Operating rod spring

Operating rod

8, fig. B-6

It unserviceable* replace*

NùU. Check ebn«*t#d hok o® mr of conMctor body; mtkt oertmJn It flu luf ot NBi rdtftM. Check front portion of body for ent>c#-mtftt with connector lock.

Pit 3-2.

MuBt have free length of not less than 14 M or more than 15^ inches.

Free movement with operating rod guide.

Section VII. MAINTENANCE OF BOLT ASSEMBLY

3-10. General

Refer to table 3-7.

TabU 3-7. Guide to Maintenant* Functiona

ta

Rwnovml/

~_____Ms_________r

Ctauüftf tad repali

Toete ud âd>uetnMOU

Bolt assembly

Par 2-8.

Fig. B-7 Tod miwt (flf.

Par 8-1.

femoral/

It»

IttUltftttoa

Dfc—laMr/MS—My

Ctwatos ud m*fa-

Tata ud «d>MlBHeto

Move the retaining handle to

ita rearward poaltlon and

Sneert the bolt assembly,

aligning tba bolt ejector

with the ejector stud.

Close the retaining handle»

compressing cartridge

ejector spring, and prees

down on extractor shank

plunger and remove ex

tractor. Lift handle and

remove cartridge ejector

and plunger. Remove bolt

and lift out firing pin.

Cartridge extractor

Pig. 8-6

1. fig. B-7

Par 8-2.

Check for free action.

Cartridge ejector

2, fig. B-7

Par 3-2.

with spring

Extractor spring

8, fig. B-7

Par 8-2.

plunger

Firing pin

4, flg. B-7

Par 8-2

Not*. Use gage 7274788 to cheek firing pin protrusion (flg. 8-7). Refer to TM 9-1006-288-20.

Breech bolt

6 and 8, fig. B-7 Do not disassemble further unless visual inspection demands.

Par 8-2

Use firing pin hole diameter plug gaga 7468406 to check diameter of firing pin hola (flg. 8-4)* Check bolt In receiver in conjunction with headspace gaga {flg. 8-16).

Bolt roller and bolt

Fig. 8-8

9 and 7, flg. B-7

Par 8-2

roller retainer

Not*. To replace the bolt roller, remove by prying or grinding off bolt atud. Remove retainer by prying from recessed end of bolt atud.

Prior to assembly, the bolt roller retainer, roller, and bolt atud will be coated with rifle grease (lubriplate).

For assembly procedures refer to flgura 8-9.

Caution: Exerdae care net to damage er alter critical dimensions and enr-faces of locking lug.

EXTRACTOR - 77V1578

Lubriplate Grease M14

TOOL - 779 1607

EJECTOR STUO

TOOL - 779 1607

EJECTOR STUO

EXTRACTOR SHAFT PLUNGER

WE 9216

7274761 Gage

FIRING PIN PROTRUSION GAGE-7274736

BREECH BOLT* 77901as

FIRING PIN PROTRUSION GAGE-7274736

BREECH BOLT* 77901as

WE T5551

Figure S-6. Bolt disassembly using bolt aesembly and disassembly tool 7791607.

FiQur* 3-7. Gaging firing pin protrusion.

BOLT ASSEMBLY

7791607 Bolt Assembly Tool

EJECTOR STUD

TOOL - 7791607

BOLT ASSEMBLY

EJECTOR STUD

TOOL - 7791607

WE 9665

Bolt Disassembly Tools

NO GO PLUG GAGE

BREECH BOLT -7790186

Figure 3-3. Checking diameter of firing pin hole.

NO GO PLUG GAGE

BREECH BOLT -7790186

WE 15550A

Figure 3-6. Installation of extractor.

Figure 3-3. Checking diameter of firing pin hole.

M16 Firing Pin Recess

BOLT

ROLLER

RETAINER

BOLT STUD

BOLT

ROLLER

RETAINER

BOLT STUD

A - INSTALLING BOLT ROLLER RETAINER ON BOLT STUD

CAUTION: DO NOT FORCE ROLLER ON BOLT ROLLER RETAINER.

BOIT ROLLER

CAUTION: DO NOT FORCE ROLLER ON BOLT ROLLER RETAINER.

BOIT ROLLER

M1a Bolt Roller Grease

B - POSITIONING IOLT ROLLER OVER RETAINER

Bolt Roller

C - INSTALLING BOLT ROLLER OVER RETAINER

AFTER ASSEMBLY CHECK FOR FREE MOVEMENT OF BOLT ROLLER ON BOLT STUD

BOLT ROLL«

BOLT ROLL«

Installing M14 Butplate Bolt Gun
BOLT STUD

D- BOLT ROLLER INSTALLEO ON BOLT STUD

WE 15517

Figure 9-9. Procedure for inetaüing bolt roller on bolt ttud.

Section VIII. MAINTENANCE OF STABILIZER ASSEMBLY

3-11. General

Refer to table 3-8.

Table S-3. Guide to Maintenance Function*

Rwrrvrr*]/

Item

IvaUllatfeii

THm aaambly/»aarobly

R*palr nadclmnlnr

Taata and adjaatmanta

Stabilizer assembly

Fig. B-2

Par 8-1*

Pin and washer

1 and 2y tig. B-8 Note. Remove pin and washer from yoke and stabilizer by grinding or filing the peened end of the pin flush with the washer.

Caution: Exercise car« in filing to prevent damage to washer«

Not* Position yoke on stabiliser» align holes, and in* stall pin. Place washer over pin and peen securely.

Par 8-2

Not*. When secured by washer and pin, the stabiliser should pivot freely.

Yoke assembly

8f 4, 5, and 6, fig. B-8

Par 8-2.

Stop

7, fig. B-8

Par 3-2

Note. Stop rnuat slide freely on yoke.

Stabiliser

8, fig. B-8

Par 8-2.

Section IX. MAINTENANCE OF BARREL AND RECEIVER GROUP

3-12. General

Refer to table 3-0.

Table $-9. Guide to Maintenance Function*

JUmoval/

itm

In*t*ll*tUm

Pi—aatnhly/ aaaarah)y

Ckanlnff and repair

Taata arvd *4Jorta»«&t*

Barrel and receiver

Par 2-8.

Par 8-1

Test bore with breechbore gage 7274761 (fig. 8-10).

Elevating knob and

2 and 1, fig. B-9

Par 8-2.

pinion assembly

Note. Pinion assemblies with ths elevating hand graduated in yards or meters are accep-able. When unserviceable, replace with pinion assembly reading in meters.

Rear sight

Graduation Unes on base and receiver must be clear and well defined.

Selector shaft lock,

7 thru 11, fig. B-9

Par 8-2*

selector, spring, shaft,

and sear release

Gas cylinder piston

19, fig. B-B

Par 8-2

Note. Shoulder stop must not restrict movement.

Table t-t. Quid* to Maintenance Function*-Con tinned

Item

IsvteSation

Dli>nmWy/

Qmnfos ftnd rvpalr

Gm cylindtr piston— continued

FUeh suppressor, (M14 only)

Front eight

14 thru 17, Ag B-9 Note. When installing flash suppressor refer to figure $-12 for uee of improvised barrel facing flaeh eup-preeeor muzzle eeat tool. When assembling not and flaeh suppressor the nut ahould not be backed off to align the notch of the not with the setecrew, as this will result in a looee flash suppressor. If the nut can. not be tightened sufficiently to align the notch with the setsersw replace nut. If necessary, repeat this procedure until the proper flt Is accomplished. Retain the nut, that has been removed, to be utilised on other rifles with looee suppressors. Note. Avoid interchanging flash suppressor. Install flash suppressor and tighten nut, using lock nut flash suppressor pliers 7790493.

Caution. When Installing the flash sup-resaor, the face of the barrel and the mating recess In the flash suppressor must be free of any damage, distortion, dirt or foreign objects. When assembled these surface« must be In perfect alignment (fig. 3-12). 18, fig. B-9

Note. Make certain flash suppressor is secure to barrel.

Par 8-2

All critical areas with not-go snap gages 7274757 <Ag. 8-14)/ Not*. Apply gage <o both edges and top of orifice. Caution. Do not force piston Into gage. Check alignment with alignment tool as indicated in flg $-11.

If alignment tool binde withln flash suppreesor (flg. 8-11), remore flash euppreiaor and uae Improvisad barrel facing and flash suppressor muíale saat tool as indica t-ed in flg. 8-12.

Note. During targeting and/or "sight-

T*bU S-9. Quid* to Maxntrnanc* Function*-Continued

B«nml/

iMtuDttfan

DlHMmblr/UMRlOllr

ca-ttl»« «txl

Twta and *dja«tia«mt>

Front sight—Continued

enlnjf in" it may be neceeaery to adjust the fight right or left to obtain an equal amount of asimutfc adjustment with rear sight This is permissible if the base of the sight does not extend beyond the base of the flesh suppressor.

Qu cylinder lock

Not*. Tighten lock by hend ae far » poasible, then beck up lock to elign with gas cylinder.

Par 2-2.

Oee cylinder plug *nd

12 and 20, fig. B-9

Per 3-2.

|u cylinder

Caution. Do not attempt to re-thread or repair if threads are damaged.

Spindle valve

21, ilg. B-9

Per 3-2.

Operating rod guide

25, flg. B-9

Par 3-2

Loose. A certain amount is permissible. Cbedc by installing operating rod and bolt. If rod and bolt'mere freely from opened to cloeed poeftioni under its .own weight, when the receiver is positioned 90 degrees in either direction it ie acceptable*

Bolt lock

27, flg. B-9 (Refer to figure 2-16 for ditaesembly.)

Per 8-2.

Bolt lock eprlng

23, flgt B-9

Par 3-2.

Connector lock

80, fig. B-9

Par 3-2.

Cartridge clip gulda

«2, fig. B-9

Par 8-2.

Berrel end receiver

93 end 24, flg. B-9

Bafer to TM 9-4938-203-84 SoU, Check 7.62-MM rifles same as ceL

JO.

BREECH BORE GAGE-7274761

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