Pressure Plate: 12", w/o hub (w/ 1.437" flywheel step) (w/ 7" Hub). PART NO: A-70255689. Clutch Parts > Single Clutch Allis-Chalmers TRACTOR: 180 Allis-Chalmers TRACTOR: 185 Allis-Chalmers TRACTOR: 190 Allis-Chalmers TRACTOR: 190XT (w/ 7" Hub) Allis-Chalmers TRACTOR: 200. . MODELS: Allis-Chalmers TRACTOR: 180 Allis-Chalmers TRACTOR: 185 Allis-Chalmers TRACTOR: 190 Allis-Chalmers TRACTOR: 190XT (w/ 7" Hub) Allis-Chalmers TRACTOR: 200.