If dipper sticks are hollow, pipe is in. stalled through them and connected to hose which runs to operating valve at one end and to a 2-way air cylinder, mounted on the tongs. The extension or adapter is easily mounted on dipper sticks. It can easily be removed to replace dipper on sticks for excavation work. It varies in length from 4 ft. to 6 ft. Operations of loading, hauling, dumping or lowering of lumber are carried out by the tractor operator.
Hydraulic lift is driven by the tractor's motor.
It is built to carry 16 ft. timber, balanced and levelled, clear of the ground. Longer lengths can be carried, but unbalanced. Motor and cutting unit are held by a curved support which moves lengthwise, and raising and lowering are operated by a special winch. Etablissements P.P.K., 45-47, Boulevard St. Denis, Courbevoie, Seine, France. Special features include clutch that can be removed or installed in less than an hour, and disc-type industrial brakes.