Anonymous-0
Well-known Member
I've got an issue with the fuel injector pumps on a 1955 Cat D2 leaking, appears like they are leaking around the fuel inlet seal. When we originally got this dozer it wasn't running, had been parked for several years in a garage. You could see that the pumps had been leaking before it was parked. I looked up the parts and pictures in the service books and assumed it was the seal leaking, reasonable thought for a dozer that is almost 60 years old. When we removed each pump the original seals didn't bad, but also didn't look great, and they were 'cone' shaped. The new seal, part number 2A-3307 is a standard looking seal, 0.311" diameter with .188" cross section. I definitely thought new seals would address the leak. Well, we got everything back together and still have the leak. It appears that it's not as bad, but still a decent leak. Has anyone had experience with these pumps leaking and is there another type of seal available? I don't see how a standard seal is getting enough compression to seal because the pump housing is cone shaped and the seal called out is just a standard profile seal. Any help would be appreciated. Thanks, Nate