Figure Rebuild flow chart

Table IV. Operations Route Sheet for cal. .30 Carbines MI, M1A1, M2, and M3

CJl CO

Oper

Gages

ation,

Operation

Machine

Fixtures

Tools

No.

1

Unpack

2

Check for live ammunition

3

Degrease

Vapor degreasor

4

Record serial number

5

Remove stock and hand guard

6

Disassemble into subassemblies

7

Disassemble trigger housing group

7160026

8

Disassemble bolt

7313298

9

Disassemble operating slide

10

Remove gas cylinder pistol and nut if necessary

7160995

11

Remove front and/or rear sight if necessary

Vise

7160026 7312068

12

Clean all parts

13

Inspect stock and hand guard for dents, multilation and cracks

14

Inspect trigger housing and components a. Inspect for wear.

b. Check to see that new type hammer and spring are used for the carbines M1 and M1A1.

c. Check to assure that rotary safety is used on all carbines.

d. Check to see that new type magazine catch is used.

e. Check to see that latest safety and magazine catch plunger assembly is used.

Comparator

7319701 7319811 7319882

7317839

7317840

15

Inspect operating slide group a. Inspect for wear and cracks of slide.

b. Check to assure that new type stop and spring are used.

c. Inspect slide spring and guide for rust, deformation and wear.

33 00

Table IV continued

Oper

ation,

Operation

Machine

Fixtures

Tools

Gages

Mo.

16

1 nspect bolt a. Inspect for wear.

b. Check to assure that new unused extractor, spring and plunger (new type) are used.

c. Check for modified or new type firing pin.

17

Inspect barrel and receiver a. Check for looseness and alignment.

b. Inspect for wear and cracks in receiver.

c. Inspect barrel and receiver for serviceability.

d. Inspect gas cylinder group.

e. Check for obscured serial number.

f. Check head space.

Vise

7319932 7319934 7319936 7319938 7319943

18

Make replacement of parts and repairs as required

19

Refinish as required

20

Polish and refinish as required

21

Inspect

22

Ream chamber if necessary and check head space

Vise

7319906

Gages as above

23

Sandblast for ref inishing if necessary

24

Rebarrel if necessary and check head space

Vise

7113308

25

Assemb le su bassemb J ies

5262065 7161313 7312068 7313298

JJ cd m

Table IV continued en

Operation, No.

Operation

Machine

Fixtures

Tools

Gages

33

Assemble subassemblies to carbines

Inspect

Function fire

Do necessary repairing

Clean carbine Final inspection

Record serial number (optional) Preserve and pack

Note.-Repeat operations 26 & 27 if repair work is performed.

00 CD

SECTION III. TRIGGER HOUSING GROUP, CARBINES M1 AND M1A1

DISASSEMBLY

a. Refer to page 14 for instrictions on the removal and disassembly of the trigger housing group.

b. To facilitate the removal and installation of the trigger spring (Fig. 45), tool 7160026 has been devised, to be used as follows:

(1) Remove the stock from the carbine.

(2) Insert the tube portion of the trigger spring removing tool (Fig. 46) in the recess in the rear of the trigger housing containing the trigger spring; compress and retain the trigger spring within the tube of the tool.

(3) Turn the handle of the tool one-quarter turn counterclockwise.

(4) Withdraw the tool and spring while pushing the handle of the tool slightly to the right.

INSPECTION

a. General. Inspect all parts for damage, excessive wear which might cause malfunction, burrs, rust, foreign matter in recesses, deformation, and free action with mating parts.

b. Trigger Housing (Figs. 45 and 47). Inspect housing for deformation, wom (elongated) or burred pinholes, worn or burred retaining lugs, bent trigger guard bow, foreign matter in recesses, burred magazine catch guide way, and rust. Some of the fabricated (brazed) type of housings were cyanide hardened during manufacture and some were not. The pinholes of the earlier ones, which were not hardened, are more subject to wear. Inspect the trigger housing group for looseness, and operation, The group should assemble easily to the receiver without apparent looseness or side play. Forward or rearward movement due to clearance at retaining pin should not exceed approximately 0.006 inch by hand test.

c. Trigger Housing Retaining Pin (Fig. 45). Old type of trigger housing retaining pin (with springs) must be discarded and replaced with new type of retaining pin (Fig. 48). (New type pins have no spring.) Inspect retaining pin for wear, burrs, and rust.

Rebarreling Carbine

MA»..-SAM46Î i rat «fAiMiNc. moot»HoustNO 'iïffî HW4S0 . ':.:'

vwno. »A« nmu H SAHTY -4200980 (SHOWN) f nwttfft. MAO A»Mt CAtCM AMO Uim jr&i&v.v/.

[CATCH. WACAiiNi^-SHOW& [CATCH. MAGAJtKiE— fU 16*2

HOliJiNO TtlOGi* ¿KiOOUVOWfO f WOUVNO. »WO«» 7161«?* }

Figure 45. Trigger housing assembly for carbines M1 and M1A1 — exploded view.

Carbine Breakdown Exploded View
0 0

Responses

  • marmadoc labingi
    How to install spring in m1 carbine trigger housing?
    7 years ago

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