Safety Mechanisms

Components which prevent the weapon from firing accidentally or interrupt the firing cycle intentionally are considered safety mechanisms. These include:

a. Thumb safety (1). Activates the safety slide inside the sear assembly. The safety slide blocks the sear from being depressed by the operator as long as the safety is on 'S' (SAFE).

b. Charger handle assemblies down. The safety slide on the inside edge of each charger arm slides rearward as the handle assembly is rotated down. With a handle assembly down, the bolt sear cannot come in contact with the forward end of the receiver to release the firing pin, so firing cannot occur. One or both handle assemblies may be lowered. Remember "CHARGER HANDLE ASSEMBLY DOWN" is the action for a runaway gun.

ROTATE

ROTATE

CHARGER SLIDE PREVENTS FIRING

1LK014

UNIT AND DIRECT SUPPORT

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

REPAIR PARTS AND SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT COMMON TOOLS AND EQUIPMENT

For authorized common tools and equipment, refer to the Modified Table of Organization and Equipment (MTOE) applicable to your unit.

SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT

Special tools required for Unit and Direct Support are listed in WP 0099 00 and WP 0100 00. REPAIR PARTS

Repair parts are listed and illustrated in WP 0101 00 through WP 0121 00 of this manual. END OF WORK PACKAGE

CHAPTER 2

UNIT MAINTENANCE INSTRUCTIONS

MK19 MOD 3 40 MM MACHINE GUN AND

UPGUNNED WEAPONS STATION MK 19 40 MM MACHINE GUN

CHAPTER 2

UNIT MAINTENANCE INSTRUCTIONS

MK19 MOD 3 40 MM MACHINE GUN AND

UPGUNNED WEAPONS STATION MK 19 40 MM MACHINE GUN

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)

UNIT TROUBLESHOOTING INDEX

GENERAL

This section contains Unit level troubleshooting information for locating and correcting most of the operating troubles that may develop in the MK 19 MOD 3/Upgunned Weapons Station. Each malfunction for the individual part or assembly is followed by a list of tests or inspections that will help you to determine the corrective actions to take. You should perform the tests/inspections and corrective actions in the order listed.

This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a malfunction is not listed or is not corrected by listed corrective actions, see the individual repair sections in the maintenance procedures for each major assembly.

TROUBLESHOOTING PROCEDURES

Refer to Troubleshooting Work Package for malfunctions, tests, and corrective actions. The Symptom Index is provided for a quick reference of the malfunctions covered.

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