O-Ring (S/N 8001 > ). PART NO: A-70923845. Cond. Inlet. . MODELS: Allis-Chalmers TRACTOR: 7000 (S/N 8001 > ) Allis-Chalmers TRACTOR: 7010 Allis-Chalmers TRACTOR: 7020 Allis-Chalmers TRACTOR: 7045 Allis-Chalmers TRACTOR: 7060 (S/N 6001 > ) Allis-Chalmers TRACTOR: 7080 (S/N 3001 > ) Allis-Chalmers TRACTOR: 8010 Allis-Chalmers TRACTOR: 8030 Allis-Chalmers TRACTOR: 8050 Allis-Chalmers TRACTOR: 8070.