Bev Fitchett's Guns Magazine

Pivot Post Mk19

If the secondary drive lever is not properly engaged with the inner feed slide pin, the weapon will not feed.

a. Slide the vertical cam assembly (17) through the rear of the receiver until the raised portion slides over the lip of the receiver (13) and the pivot post holes are aligned. Engage the forked end of the vertical cam assembly with the forward notch in the receiver (13). Slide the primary drive lever (18) through the forward end of the receiver until the large pivot post (19) can be pushed upward into the receiver (13) and the vertical cam assembly (17). Slide the drive lever lock (20) forward to lock the vertical cam assembly (17) and the primary drive lever (18) in place.

SUPPORT

SUPPORT

10. INSTALL PRIMARY DRIVE LEVER.

a. The primary drive lever is installed with the vertical cam assembly.

ASSEMBLY - Continued

11. INSTALL BOLT AND BACKPLATE ASSEMBLY.

a. Ensure the firing pin is cocked with the cocking lever in the forward position. Insert the bolt into the rear of the receiver until it stops. Close the top cover, ensuring the secondary drive lever and primary drive lever are properly aligned.

12. INSTALL BACKPLATE PIN ASSEMBLY.

a. Insert the backplate pin assembly (21) through the receiver and bolt and backplate assembly from either side. Using a rubber mallet, strike the backplate pin assembly to engage the locking ring.

13. INSTALL SEAR ASSEMBLY.

a. Turn the weapon upside-down. Place the safety on 'F' (FIRE). Squeeze the receiver sear (22) and thumb safety (23) together during installation. Align the sear housing with the cutout in the bottom of the receiver. Holding the safety pressed down, twist the assembly 90 degrees so that the thumb safety is toward the rear of the receiver. The assembly should click into place. Place the safety on 'S' (SAFE).

1LK099

14. INSTALL FEED THROAT ASSEMBLY.

a. Squeeze shoulder pins (24) on feed throat (25) and insert into slots on both sides of receiver.

END OF WORK PACKAGE

DIRECT SUPPORT

MK19 MOD 3 40 MM MACHINE GUN (NSN 1010-01-126-9063) UPGUNNED WEAPONS STATION MK19 40 MM MACHINE GUN (NSN 1010-01-362-6513)

MAINTENANCE OF THE BOLT AND BACKPLATE ASSEMBLY - BACKPLATE PIN ASSEMBLY

REMOVAL/INSTALLATION REMOVAL, INSPECTION OF INSTALLED ITEMS, INSTALLATION

INITIAL SETUP:

Tools and Special Tools

Combination tool (PN 3269494) Tool kit, small arms repairman,

SC-5180-95-CL-A07 Tool kit, small arms repairman

SC 4933-95-CL-A07 with addition of SL-3-00607A) Tool set, intermediate maintenance, SL-3-08669A (Marine Corps only) Tool set, organizational maintenance, SL-3-08668A (Marine Corps only)

Materials/Parts

Abrasive cloth (item 3, WP 0124 00) Backplate pin assembly (item 1, WP 0125 00) Lubricant (as required)

Equipment Condition

Ensure bolt is in the forward position (WP 0059 00).

REMOVAL

1. BACKPLATE PIN ASSEMBLY REMOVAL.

a. Place the safety on 'F' (FIRE). Observing the WARNING, above, retract the backplate pin assembly from the appropriate side, using a screwdriver tip of the combination tool. Pull the backplate pin assembly straight out.

INSPECTION OF INSTALLED ITEMS

1. INSPECT FOR RUST.

a. Remove rust with an abrasive cloth and preserve with a light coat of lubricant.

2. INSPECT RETAINING RING.

a. Ensure the retaining ring (1) is present on the backplate pin assembly. If it is missing, install a new backplate pin assembly.

INSTALLATION

Insert the backplate pin assembly through the receiver and bolt and backplate assembly from either side. Using a rubber mallet, strike the backplate pin assembly to engage the locking ring.

END OF WORK PACKAGE

DIRECT SUPPORT

MK19 MOD 3 40 MM MACHINE GUN (NSN 1010-01-126-9063) UPGUNNED WEAPONS STATION MK19 40 MM MACHINE GUN (NSN 1010-01-362-6513)

MAINTENANCE OF THE MK19 MOD 3 MACHINE GUN - SECONDARY DRIVE LEVER ASSEMBLY

REMOVAL/INSTALLATION REMOVAL, INSPECTION OF INSTALLED ITEMS, INSTALLATION

REMOVAL

1. REMOVE SECONDARY DRIVE LEVER.

a. Open the top cover assembly. Locate the center hole in the outside of the top cover. Press the pivot post (1) through the hole toward the inside of the top cover. Lift up on the secondary drive lever (2) to remove it from the feed slide assembly.

INITIAL SETUP:

Reference

WP 0022 00

General Safety Instructions

Weapon on 'S' (SAFE), bolt in the forward position.

a. Open the top cover assembly. Locate the center hole in the outside of the top cover. Press the pivot post (1) through the hole toward the inside of the top cover. Lift up on the secondary drive lever (2) to remove it from the feed slide assembly.

1LK102

INSPECTION OF INSTALLED ITEMS

1. INSPECT SECONDARY DRIVE LEVER.

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