Radiator Hose, Lower (Diesel). PART NO: A-70249756. New lower radiator hose with an inside diameter of 1.5". This radiator hose fits the Allis-Chalmers Tractor 170 (diesel) and 175 (diesel). Dim A (1)A - 1.500". . MODELS: Allis-Chalmers TRACTOR: 170 (Diesel) Allis-Chalmers TRACTOR: 175 (Diesel).