I have had a starting problem for years and finally solved the problem after 35 years. I have tried everything from safety switches to the starter trying to get this starting problem fixed. You have to clean the connections on the glow plugs to make sure they are clean and making good contact to complete the safety circuit so the tractor will start everytime just at the bump of the stater. Just thought I would pass this along to other owners of the 245,255 case/IH owners