Feed Throat Assembly

Compressed Spring Charger

b. Place the arm with charger handle lock in a vise. Drive in the slotted spring pin (7) using a brass-head hammer. Ensure the ends of the slotted spring pin are flush with the arm.

3. INSTALL THE HELICAL COMPRESSION SPRING, CHARGER SLIDE, ARM, SELF-LOCKING NUT, AND COTTER PIN.

a. Insert the threaded end of the charger slide (8) through the center groove on the charger housing (2). Ensure the threaded end is to the outside of the housing.

b. Position the helical compression spring (9) in the hole in the charger handle lock (5).

c. Slip the arm (with the handle assembly) (10) over the charger slide's (8) threaded end.

d. Screw a self-locking nut (11) onto the charger slide (8). Tighten with the 7/16 inch box end wrench.

e. Move the handle up and down to test the functioning. If the handle does not move easily, loosen the self-locking nut (11) slightly.

f. Install a new cotter pin (12) to secure the self-locking nut (11).

4. FUNCTION CHECK THE HANDLE LOCK AND ARM MECHANISM.

a. Press the charger handle lock (5) and release. It should spring back crisply, without binding.

b. Press the charger handle lock (5) and rotate the handle assembly up and down. If the handle is hard to rotate, the self-locking nut (11) is too tight. Remove the cotter pin (12) and gradually loosen the self-locking nut until the handle moves easily. Install a new cotter pin upon assembly.

5. INSTALL CHARGER ASSEMBLIES IN THE RECEIVER.

a. Position the charger housing (2) so the lugs are aligned with the keyslots in the receiver wall. Press against the charger housing and slide it forward until the charger assembly locks in place.

END OF WORK PACKAGE

Shoulder Pin Threads Threaded

1LK141

UNIT

MK 19 MOD 3 40 MM MACHINE GUN (NSN 1010-01-126-9063) UPGUNNED WEAPONS STATION MK 19 40 MM MACHINE GUN (NSN 1010-01-362-6513)

MAINTENANCE OF MK 19 MACHINE GUN - FEED THROAT ASSEMBLY DISASSEMBLY/ASSEMBLY DISASSEMBLY, ASSEMBLY

INITIAL SETUP:

Tools and Special Tools

Tool kit, small arms repairman,

SC 4933-95-CL-A07 with addition of SL-3-00607A (Marine Corps only) Tool kit, small arms repairman,

SC-5180-95-CL-A07; Tool set, intermediate maintenance, SL-3-08669A (Marine Corps only) Tool set, organizational maintenance, SL-3-08668A (Marine Corps only)

DISASSEMBLY

1. SECURE FEED THROAT.

a. Place ear of feed throat (1) over an open vise and secure, so tips of shoulder pins (2) are exposed.

2. REMOVE SHOULDER PINS.

a. Insert 3/32 inch punch into holes behind feed throat (1) over shoulder pins (2) and tap out, using a hammer.

3. REMOVE FEED THROAT PLUNGERS AND HELICAL SPRINGS.

a. Pull out feed throat plungers (3 and 4) and remove helical springs (5). Discard feed throat plungers and helical springs.

Mk19 Feed Throat Assembly

Materials/Parts

Feed throat plunger (2) (item 5, WP 0125 00) Feed throat plunger (2) (item 6, WP 0125 00) Helical spring (2) (item 10, WP 0125 00) Lubricant (as required)

Equipment Condition

Feed throat assembly removed from weapon (WP 0041 00).

ASSEMBLY

1. SECURE FEED THROAT IN VISE

a. Place feed throat (1) over an open vise and secure so plunger holes are exposed.

2. INSTALL HELICAL SPRINGS AND FEED THROAT PLUNGERS

a. Apply light coat of lubrication in plunger holes.

b. Install new feed throat plunger (2), larger end first, into plunger hole.

Excessive staking will cause binding when plungers are exercised. Do not overstake.

c. Align the holes, insert shoulder pin (3) and stake.

d. Insert new helical spring (4) and new feed throat plunger (2), larger end first, into plunger hole.

e. Align the holes, insert shoulder pin (3) and stake.

f. Install new feed throat plunger (5), larger end first, into plunger hole.

g. Align the holes, insert shoulder pin (3) and stake.

h. Insert new helical spring (4) and new feed throat plunger (5), larger end first, into plunger hole.

i. Align the holes, insert shoulder pin (3) and stake.

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Responses

  • Muhammed
    How to fit a beretta slide lock spring?
    6 years ago

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