Radiator Hose, Upper. PART NO: A-70226893. New upper radiator hose with an inside diameter of 1.812". This radiator hose fits the Allis-Chalmers Tractor D17 (diesel SN < -38963) and WD45. Dim A (1)A - 1.812". . MODELS: Allis-Chalmers TRACTOR: D17 (Diesel S/N < -38963) Allis-Chalmers TRACTOR: WD45.