Impeller. PART NO: A-70578042. On Blower Motor Dim A (1)Used When Both Impellers are the Same. . MODELS: Allis-Chalmers TRACTOR: 7000 (S/N 8001 > ) (Qty: 2) Allis-Chalmers TRACTOR: 7010 (Qty: 2) Allis-Chalmers TRACTOR: 7020 (S/N < 3357) (Qty: 2) Allis-Chalmers TRACTOR: 7030 (Qty: 2) Allis-Chalmers TRACTOR: 7040 (Qty: 2) Allis-Chalmers TRACTOR: 7045 (S/N < 2838) (Qty: 2) Allis-Chalmers TRACTOR: 7050 (Qty: 2) Allis-Chalmers TRACTOR: 7060 (Qty: 2) Allis-Chalmers TRACTOR: 7080 (Qty: 2).