Near Intersection of I-35 & I-90 Southern Mn. | I have a 9770 also and fortunately have not had that problem. I would try reinstalling the filter or try another a new filter before changing out the fuel pump.
The fact that this pump problem occurred after the filter change leads me to suspect it. Was there some type of problem that caused you to change the filter? Lack of power etc. or did you just change it as a part routine maintenance?
If you changed the filter due to a lack of power etc. the pump may be part of the problem or there may be another cause. Last year I lost engine power first day out in soybeans. On mine, one of the clamps on the intake manifold had broken (tough to see since it is on the back side of the engine). This meant that I lost turbo boost. Without turbo boast, the engine derated and I could barely move the combine let alone harvest with it.
My Great Nephew was able to find this "by feel". After letting the engine cool down, he was able to feel around the backside with his hands and detected the broken clamp. He was able to replace the clamp and things returned to normal.
As others have stated, after changing the fuel filter, turn the key but do not attempt to start the engine. The system should circulate fuel to purge the system of any air introduced with the filter change. After waiting a while then attempt to start the engine. This procedure has worked fine for me on fairly new Deere machines. On older models, it was necessary to crack a bleeder line and pump manually to purge the air.
Edited by tedbear 7/3/2025 06:58
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9770 combine
