Pressure Plate: 8.5". PART NO: A-70226262. Clutch Parts > Single Clutch Allis-Chalmers POWER UNIT: B125 Allis-Chalmers POWER UNIT: B15 Allis-Chalmers TRACTOR: B Allis-Chalmers TRACTOR: C Allis-Chalmers TRACTOR: CA Allis-Chalmers TRACTOR: IB. . MODELS: Allis-Chalmers POWER UNIT: B125 Allis-Chalmers POWER UNIT: B15 Allis-Chalmers TRACTOR: B Allis-Chalmers TRACTOR: C Allis-Chalmers TRACTOR: CA Allis-Chalmers TRACTOR: IB.