PART NO. A-70249760. Radiator Hose, Lower (Gas). New lower radiator hose with an inside diameter of 1.5". This radiator hose fits the Allis-Chalmers Tractor 170 (gas) and 175 (gas). Dim A (1)A - 1.500". MODELS: Allis-Chalmers TRACTOR: 170 (Gas) Allis-Chalmers TRACTOR: 175 (Gas) . Pk size: 1.