The other day someone mentioned to me that International Truck Corp. is offering free replacements gas caps for many of the pre-1980 larger tractors. Apparently the older gas caps with the single vent hole can build up pressure and cause a fire when the cap is unscrewed. The replacement cap has two vent holes and is available free of charge until May of 2007. The website to order these caps is www.ihgascap.com. This site has a list of tractors that apply for the replacement and you just need to provide contact info and your tractor's serial number. I just ordered one for my cub 154.
-Mike
-Mike