PART NO. A-70230217. Gear, Crankshaft Timing (Gas Eng. SN 45-11050- > ). Dim A (1)27 Teeth. MODELS: Allis-Chalmers POWER UNIT: W226 (Gas Eng. SN 45-11050- > ) Allis-Chalmers TRACTOR: D17 (Gas) Allis-Chalmers TRACTOR: WD45 (Gas Eng. SN 45-11050- > ) Allis-Chalmers TRACTOR: 170 (Gas) Allis-Chalmers TRACTOR: 175 (Gas) . Pk size: 1.