Installation Instructions for the M198 Howitzer

TM 9-6920-361-13&P

2-10.1. Installation Instructions for the M198

Step 4: Aline pin on adapter with slot in washer and

install washer. Install nut and tighten completely.

Howitzer. To mount the barrel in the M198 howitzer and

boresight the device, follow steps 1 through 11.

Step 5: Remove the four head cap socket screws and

Step 1: To remove the firing mechanism, firing

the adapter cap.

mechanism block, and obturator spindle assembly, refer

to the operator's manual for the major caliber weapon.

Step 2: Remove adapter nut and washer.

Step 6: Remove the elevating arc from the gun barrel by

Step 3: Insert the adapter (top up) in the breechblock.

removing the two mounting screws.

Step 7: Attach fine thread across the tour witness marks

on the end of the tube by using a rubber band. Also

place boresight strings on the muzzle of the howitzer.

Change 1 2-22.1