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The gun is run in and laid square under the housing-bolt, the bed and quoin removed, the muzzle elevated and secured as in the housing position; then, after un-keying and throwing back the cap-squares, the breech is bowsed up clear of the carriage by means of the train-tackle, hooked in the eye of a runner, the block of which hooks in an eye-bolt in the beam over the gun.
Nos. 7 and 8 un-key and throw back cap-squares and choke luffs of side-tackles, or, if rolling deeply, hitch them round the straps of the blocks.
Nos. 3 and 4 lift the muzzle by a section of the rammer-handle; the preponderance not being sufficient to overcome the friction of the trunnions in the cap-squares.
The cap-squares must be frequently removed, the guns lifted and the trunnions cleaned; the elevating screws oiled, but never cleaned with brick or emery paper.
The gun's crew being assembled at Quarters, remove the pin and chock from the cascabel, into the jaws of which place a selvagee strap; hook the double block of the train-tackle into the housing-bolt over the port, and its single block into the selvagee strap; remove the cap-squares, and place a round block of wood on the sill of the port, high enough to let the chase bear on it when slightly depressed; raise the breech as much as possible, without lifting the gun out of the carriage.