Tractor Restoration Therapy

Iowa farmer turns to tractor restoration to keep him on his feet.

SpeedFrictionDriveSystem.jpg
The variable-speed friction drive system found on the Heider and GO tractors features a layer of friction material on the rim of the engine’s flywheel (center). In order to move the tractor forward, the transmission’s drive plate (left) is pressed into contact with the edge of the flywheel. To move the tractor in reverse, a drive plate located on the other side of the tractor is brought into contact with the flywheel. The tractor’s drive ratio can be increased by sliding the engine, which will effectively place the flywheel rim in contact with a smaller diameter portion of the drive plate, which yields a higher (lower numerical) “gear” ratio.