The fuel is leaking on that stub shaft that the throttle linkage hooks onto. Is there a oring inside there or a seal?
I should mention this is on a 1984 D6D
I'd guess it's a cup type seal. If it's anything like on a 3204 you might be able to fit 2 seals in the cover. Would be good to have a page from the parts breakdown to see what's inside so you don't accidently have things come apart when you take the cover off.
Thanks Dave! I'll do some digging and see what I can find. Do you think that would cause it to suck air through there and make it lose prime? I changed fuel filters cause it is starving for fuel...that lasted fir awhile then a few days later I drove it to the shop and it sounded like it was missing...and when I throttled down it quit. Had to pump the primer to get it going again.
Post a Serial Number and you are welcome to a parts list for the fuel injection pump and governor control.
Yes govrenor....the serial number is really hard to read on this cat..worn off ...but I'll try coloring it in with a pencil
Unfortunately when it comes to D6D there are a lot of options, hence why a S/No is always a good start. Yours is most likely to be a US-built tractor, but certainly not guaranteed to be.
Getting the S?N will help getting more an better information, but for right now I can say this much. Yes there is a lip seal in that cover where the shaft comes out, but there should not be fuel leaking there unless the internal seal is also bad. See arrow in picture below: The seal in the cover where fuel is coming out is the one marked as #10 if you look to the left on that shaft where I have the arrow pointing there is another seal that should be keeping fuel from getting in to the area where the parts marked 4 and 7 are located. Both of those seals are same part number 4N2786. The main thing is if you remove the shaft the fork part number 1 will drop out and that is not a good sound! I'm 99% sure that the whole governor end has to come off to replace the inner seal and get it back together. It's been to many years since I have done that job so hopefully someone else can give you information on that, not really a bad job but needs to be done carefully! If you can post the S/N I'm thinking someone will come up with the information. At least one other person on the forum has done this job in the last couple of weeks.
It is a little different than a 3204. It seems odd the inner seal isn't listed in the above photo. Maybe on the parts list it mentions 2.
No in what can sometimes be a "gotcha" with Cat parts books they show the inner seal in an almost impossible to find area like this: See that item #7 just about in the middle of the picture? That's the inner seal same part number 4N2786!