CHANGES No. 1
TM9-1205

This changes insert was issued to update TM9-1205. It was 4 pages - one sheet of paper folded in the center . You can use this page as reference, or print it, though it will print everything, even this text. If you would like to print the insert as it was issued, click on the link below and you will be taken to a page with the actual full sized scans.
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TX 9-1205
C 1

RESTRICTED

TECHNICAL MANUAL

ORDNANCE MAINTENANCE

BROWNING   MACHINE   GUN,   CALIBER   .30,   ALL   TYPES,   AND   GROUND   MOUNTS
CHANGES
No. 1
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WAR DEPARTMENT
WASHINGTON 25, D. C., 3 March 1945

   TM 9-1205, 7 August 1944, is changed as follows:
24. CASING GROUP ASSEMBLY.
   a. Casing  Group     (M1919A4,   M1919A5,   M1919A6,   and M1919A1  Guns).

  *                              *                            *                            *                            *                            *                            *   
    (5) BREECH Lock CAM (Superseded). Place breech lock cam on to the bottom plate so that the high side faces forward, making sure that it is properly seated. Insert screw through bottom of bottom plate, tighten, then loosen one-sixth to one-fourth turn. Then stake screw two places on inside of casing adjacent to slots provided in breech lock cam.
  *                              *                            *                            *                            *                            *                            *
35. COMPLETE INSPECTION.
  *                              *                            *                            *                            *                            *                            *
   b. Bolt Group.
    (1) BOLT.
  *                              *                            *                            *                            *                            *                            *
    (f) Check size of bolt is unserviceable. NOTE: Unservicable bolt assemblies having recoil plates which are serviceable, except for the enlargement of the firing pin hole, and serviceable bolts found to have oversized firing pin holes, should be sent to Rock Island Ordnance Center for reworking. Broken or otherwise disposed of locally
  *                              *                            *                            *                            *                            *                            *
   c. Lock Frame Group.
  *                              *                            *                            *                            *                            *                            *
     (4) BARREL PLUNGER..
  *                              *                            *                            *                            *                            *                            *
    (b) Test function of   *   *   *   should be replaced.
                             3.75 inches, cal. .30, M1919A1
                             3.56 inches, cal..30, M1919A4
                                3 9/16 inches, cal. .30, M2
   d. Barrel and Barrel Extension Group.
    
(1) BARREL.
  *                              *                            *                            *                            *                            *                            *
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BROWNING MACHINE GUN
     (c) Bore gaging.   Each barrel inspected   *   *   *    in the gun.
      NOTE: Rescinded.
  *                              *                            *                            *                            *                            *                            *
    f. Casing Group.
  *                              *                            *                            *                            *                            *                            *
      (4) BARREL JACKET (M1919A4, M1919A5, M1919A6, AND M2 Guns).
  *                              *                            *                            *                            *                            *                            *
     (e) (Superseded.) Booster cap assembly of the gun M1919A6 should be cleaned free of carbon. Assemble booster cap assembly so that its engaging slots mate exactly with the two slots in the front barrel bearing. Force retaining clip assembly down into its engaging slots in the front barrel bearing making sure that it is properly seated. Check for excessive looseness and set in retaining clip assembly. Replace if necessary.
  *                              *                            *                            *                            *                            *                            *
36. INSPECTION   OF   CAL.   .30, M2   TRIPOD   MOUNT.
  *                              *                            *                            *                            *                            *                            *
   i. (Added.) A new traversing bar assembly is now being provided for the cal. .30 tripod mount M2. It consists of a traversing bar, traversing bar screw, and a jam nut. The latter two components are assembled to the right end of the bar (fig. 118.1). This new bar can be adjusted to provide proper tension to the two rear legs forcing them against sides of the tripod head, lending rigidity and support to the mount as a unit.

Figure 118.1 - Traversing Bar Assembly.

    (1) To assemble the new traversing bar to the tripod, first attach the left end of the bar to the sleeve on the left leg. Then unscrew the traversing bar screw a few turns and attach to the sleeve of the right leg. Spread the legs. Then force the sleeve into engagement with the latch, by applying pressure to the traversing bar adjacent to the sleeve, until securely latched (fig. 118.2).

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BROWNING MACHINE GUN

Figure 118.2 - Under Side View of M2 Tripod Mount.
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BROWNING MACHINE GUN

    (2) If the bar is properly adjusted, the top sides of the rear legs should be against the sides of the tripod head, making the mount very rigid (fig. 118.2). When adjusted properly, considerable pressure is required to latch the sleeve. If this adjustment has not been reached, continue adjustment of the traversing bar screw until the top sides of the legs are in definite contact with the tripod head, the mount is very rigid, and considerable force is required to latch the sleeve.
    (3) When the adjustment is correct, tighten the jam nut against the traversing bar and stake the nut adjacent to the notch in the traversing bar (fig. 118.2).
    (4) When the sleeve is forced against its upper stop and engaged by the sleeve latch, it will provide tension on the latch eliminating the possibility of its becoming loose.
   [AG 300.7 (14 Feb 45)]
                      By ORDER OF THE SECRETARY OF WAR:

                                                                                                    G. C. MARSHALL
OFFICIAL:                                                                                     Chief of Staff
    J. A. ULIO
    Major General
    The Adjutant General

DISTRTIBUTION:
    AAF (10.); AGF (10); ASF (2); Dept (10); AAF Comd (2);
      Arm & Sv Bd (2); S Div ASF (1); Tech Sv (2); SvC (10);
      PC&S (1) ; PI~ 9 (5) ; Dist 0 9 (5) ; Reg 0 9 (3) ; Dist Br 0 9
      (3) ; Establishment 9 (5) ; Decentralized Sub-C 9 (3) ; Gen
      & Sp Sch (10) ; USMA (20) ; A (10) ; CHQ (10) ; D (2)
      AF (2) T/ & E 9-7 (3) ; 9-9 (3) ; 9-57 (3) ; 9-65 (2) 9-67;
      (3) 9-76 (2) 9-217 (3) ; 9-315 (2) ; 9-318 (3) ; 9-319 (3) 9-377 (3).
    Refer to FM 21-6 for explanation of distribution formula.

4.                                                                                   AGO 41C
U.S.GOVERNMENT PRINTING OFFICE
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