Two rear wheels far apart and a single front wheel or two front wheels close together. Tractors are no longer manufactured with narrow front ends. Essential for the safe operation of older tractors such as Ford 2N, 8N or 9N. Pony Engine. A small engine which is used to start a larger one. An extension of the drive train that allows power to be mechanically transfered to other machinery or implements via a removable driveshaft with splined couplings.
Some standards exist for PTO speeds and driveshaft connections, as described in the table below.
Large, heavy hooks behind the tractor for ripping roots or brush. Commonly used on bulldozers clearing land. Roll Over Protective Structure. A roll bar or similar device to help protect the driver in case the machine tips over. An implement for breaking up the top surface of soil.