TO TAKE THE GUN APART. The piece is first dismounted and placed with its casing resting on blocks. Mounting and dismounting are best accomplished by means of a gin. In case of necessity, it may be mounted and dismounted as a field-piece, care being taken to place blocks of wood to receive the gun-frame and to prevent injury to the front sight, or to the barrels. The operations of taking apart are executed in the following order: 1. Block up the frame and barrels. 2. Remove the hopper. 3. Remove the cascable-plate. 4. Take out the steady-pin; then turn the crank downwards and remove the crank shaft in that position. 5. Remove the rear sight, and take out the large gear-wheel. 6. Take out the rear plug in the diaphragm, and then gently revolve the gun until a lock presents itself on a line with the hole in the diaphragm, through which one lock after another is taken out. 7. Take out the breech-casing screws, and remove the casing by drawing it off to the rear. Care is taken in this operation to have the lock-cylinder and gun supported, so as to keep the axis of the main shaft parallel to the top of the frame. This is necessary to prevent the rear end of the gun from dropping when the casing is removed. 8. Remove the pin from the large nut on the main shaft in rear of the locks, and take this nut off by turning it to the _right_; then remove the lock-cylinder and carrier from the main shaft. The spiral cam need not be taken out of the casing in order to take the gun apart. TO ASSEMBLE THE GUN. 1. Put the main shaft in its place through the plates which hold the barrels, and then put in their proper places the carrier, lock-cylinder, and large rear nut. The latter should be screwed up tight and have the taper-pin put through the nut and shaft. 2. Place the gun within the frame, and let the front end of the main shaft rest in the hole designed for it in the front of the frame. When the gun is in this position, the cocking-ring should be shoved over the lock-cylinder and left for the time loosely around the carrier. 3. Let the breech of the gun be slightly raised, when the breech-casing can be shoved over the lock-cylinder to its place; then screw the casing to the frame, putting, in the meantime, the cocking-ring in its proper place. Revolve the gun to the right or left so that the places for the locks will come on a line with the hole in the diaphragm, through which one lock at a time can be inserted in its proper position; afterwards the screw-plug should be inserted to close the hole. 4. Put on the cog-wheels, replace the crank-shaft, pinion, and steady-pin. Put on the rear sight, and screw on the cascable-plate and hopper, and the gun is ready to be mounted. The piece is mounted on a 3-inch gun-carriage widened between the cheeks to receive it. The ammunition-chests are arranged for twelve trays. For field service each piece is accompanied by one caisson.