XM813 MAINT: FEEDER ASSY

Question 1

Index Drive
Assembly

Answer 1

Matched set. Cam provides rotor output of 1/3 rotation indexing (120°) during feed dwell time.

Question 2

Feed Shaft Stops

Answer 2

Stops the deselected feed shaft from rotating backwards due to the weight of the ammunition

Question 3

Rear Feed Gate Assembly

Answer 3

Holds case rim during transition from feed path to rotor path.

Question 4

Magazine Drive Spur Gears

Answer 4

Provide drive power to link less ammo magazines via transfer units.

Question 5

Cartridge Rim Guides

Answer 5

Holds case rim to provide round control

Question 6

Upload Stops (Cartridge Stops)

Answer 6

Prevent the round from being forwarded into the rotor during the upload procedure

Question 7

Wormshaft Assembly

Answer 7

The wormshaft assembly turns the worm wheel gear and provides a means to manually operate the gun.

Question 8

Worm Wheel Gear

Answer 8

Drives the gear clutch assembly

Question 9

Gear Clutch Assembly

Answer 9

The gear clutch assy provides timing for the index drive section with the feed shaft extensions.

The clutch will slip if the feeder jams.

Question 10

Upper Spur Gear

Answer 10

Drives the lower spur gear and the upper sliding sleeve clutch (upper clutch assembly) when engaged by the feed select solenoid.

Question 11

Lower Spur Gear

Answer 11

Drives the lower sliding sleeve clutch (lower clutch assembly) when engaged by the electrical solenoid.

Question 12

Upper/Lower Sliding Sleeve Clutch

Answer 12

Drives the upper shouldered shaft (when engaged) which in turn drives the upper or lower feed sprocket assembly, respectively.

Question 13

Upper/Lower Shouldered Shaft: (Feed Shaft Extensions)

Answer 13

Drives the upper or lower feed sprocket assembly (when engaged) which in turn, drives magazine spur gears to power ammunition handling system.

Contains lugs that mate with the feed shaft stop assemblies.

Question 14

Clutch Yoke Assembly

Answer 14

Operated by the feed select solenoid. The clutch yoke assembly engages or disengages the sliding sleeve clutch assemblies when the feed selection is changed by the feed select solenoid either manually or electrically.

Question 15

Index Drive Shaft

Answer 15

Driven by the gear clutch assembly. The index drive shaft is timed with the gear clutch assembly and rotates the index drive assembly, which provides the sprocket assemblies with proper ratio to the feeder assembly rotor. The index drive shaft also rotates the control cam to give the position of the bolt.

Question 16

Feed Select Solenoid

Answer 16

Provides manual or electrical selection of upper or lower feed path.

Question 17

SERVICES FOR FEEDER ASSY

Answer 17

Services for the Feeder will be conducted annually, or as broken or damaged parts require.