John Deere 6600

I recently bought a John Deere 6600 for scrap price and I am trying to get it to run. The combine has a rotary screen 329 diesel in it. It turned out that the combine itself is in better shape than I thought it was and I am trying to get it fixed. It had sat with biodiesel in the pump and it is gummed up. I freed up the metering valve because it was stuck and then I got it to start and run for a few seconds then it cuts out and dies. Every time, It will start and run for a few seconds then die like it is short on fuel. The injection pump has a good flow to it. Does anyone have any idea what could be wrong with this combine? I am trying to keep this as low cost as possible so, rebuilding the injection pump is out of the picture. However, a friend of mine parted out a 6600 Deere some 25 years ago with a 329 diesel and he will give me the injection pump for free. So if I can't somehow remedy the pump on the combine now, I could put this pump on it, if someone gave me the timing information. This pump has never seen biodiesel and was properly flushed out after removal, so I know this pump would work. Any suggestions on how to possibly fix the pump on the combine without spending too much on it? Is anybody willing to scan and email me the pump timing info out of a manual? Thanks, and sorry for such a long post. I hope I dont get beamed at for putting this on tractor talk.

Not an expert, here, but make sure the return line is free and clear. And the special check fitting in the pump for return if so equipped.

I agree with redtom. The return line and fitting with the ball is where I'd look.

Have you disconnected the fuel line to the pump to see that it flows strongly for one minute?

If it has a roosamaster pump on it, you may have to rebuild the pump. There is a washer made out of nylon in the back of the pump that will disintegrate over time in diesel and has something to do with the governor. Some machine shops will do it fairly cheap- the kit costs about 20 bucks. I rebuilt an 806 and it did something similiar. Would start and run for a few seconds and quit. Local machinist rebuilt the pump for $100 and it's been running fine since.

On my Case tractor the problem was the primary pump. It was pumping fuel, just not enough. New pump about $38.