Exercising Procedures With Power Winch.

TB 9-1000-234-13

d. Exercising Procedures With Power Winch.

(1) Use a rope or cable of sufficient strength and length to pull the cannon out-of-battery. The size rope needed

is 1 1/2 inch; the size steel cable needed is 7/8 inch. Secure one end of the rope or cable to a 4 by 4 by 24 inch piece of

wood, and install the rope or cable through the cannon bore (figures 1-1, 1-2, and 1-3). Adjust the cannon elevation so

that the rope or cable installed through the bore and connected to a winch will not rub the rifling. To prevent the rope from

being damaged, it should be bent over a sleeve instead of a small diameter hook or cable. Select a winch with the

necessary capacity for the amount of pull required. If a winch of the necessary capacity is not available, a block and tackle

may be used with the winch, or independently, to increase the pulling force. If a steel cable is used, protect the lands and

grooves with strips of wood. Be careful that the material used for securing the rope or cable at the muzzle end will not slip

and damage the bore.

WARNING

Keep the winch cable as short as possible. The shorter the cable, the safer the operators are from

danger of broken cable. Use of a winch with a power-reverse is the best way to prevent excess

unreeling and snarling of the cable.

(2) A steel bar with a reinforced disk head to press against the muzzle may be constructed for use in the bore

instead of a rope or cable, when a sufficient number of weapons are to be exercised to warrant it. Wrap the bar with cloth

to keep it from damaging the lands. This steel bar has the following advantages:

(a) It can be inserted quickly and easily through the bore.

(b) Dragging a hook over the lands of the rifling becomes unnecessary.

(d) The danger of a broken cable damaging the bore is eliminated.

1-3