- Lunette
- Middle rail
- Front cross-bar
- Foot-board
- Pickaxe attachment, front
- Ammunition-chest keys and chains
- Brake-chain
- Side rail
- Spare pole
- Ammunition-chest
- Brake-lever
- Front ammunition-chest handles
- Pickaxe attachment, rear
- Axe and spade board-irons
- Middle rail
- Brake eye-strap
- Rear ammunition-chest handles
- Ammunition-chest keys and chains
- Spare-pole stirrup
- Spare-wheel axle-bolster
- Spare-wheel axle-washer
- Spare wheel
- Spare-wheel axle
- Toggle
The limber of the caisson has already been described. The caisson, [Fig. 64a], consists of one wrought-steel tubular axle and two Archibald wheels (57¾ in.), same as for limbers, the caisson-body, and connecting parts, viz.:
The Middle rail (central part of body formed of two angle-irons) receives the lunette in front and spare wheel in rear, and is attached to the axle by an understrap, and to the side-rails by front and rear cross-bars, with connections stiffened by brackets, and the strength at axle increased by middle-rail braces.
The Side-rails, which are attached to the axle by understraps and joined to the middle rail by the front and rear cross-bars.
The Foot-board is fastened to the middle and side rails with brackets to incline the surface of the board.
Floor-rods, passing through middle and side rails, between rear chest and rear cross-bar.
Two Road-brakes complete, and attachments for implements and spare parts.
The lever road-brake now supplied is similar to the ordinary wagon-brake, and so arranged that each side may be operated separately. The shoe is applied in rear of the wheel, and the brake-lever stands upright inside the wheels, opposite the front side of the rear ammunition-chest.
The caisson body carries two ammunition-chests same as for limber.