Please read carefully!!!!! Allis Chalmers B For Radiator cap for serial number up to 61221. Fuel cap for all SN Model C for radiator cap up to serial number 18580 Gas cap all serial numbers Models CA G RC WD only used cap as Fuel cap, Model IB for Radator cap up to Serial number 100 Fuel cap all serial numbers Model RC for radator cap only did not use this as gas cap. Model WC and WF had used this as both raditor and gas for styled models only Model WD45 used cap for both gas and diesel gas caps. WF Replaces: 207244, 70207244 Will not fit after mark radiators.
