Combines new 9550 combine 2003

Just checked deere's website. The 9550 has the 8.1l engine...same as the 9510. The difference in hp was very noticeable when I went from a 9500 to a 9510. Both with the 'big' engine option.

I understand that Deere will be shipping the newest 9550's with a smaller displacement engine. The engine supposedly delivers the same horsepower as the former engine. I believe it has four valves per cylinder. I also assume it must run at a higher RPM. I would be concerned about the performance of this engine in tough slugging type conditons. I have a '97 9500 with the "big engine" option (Injection Pump)and have slugging problems at times in Soybeans. I thought that the larger displacement which was standard on the 9510 would possibly help this situation. Now it appears that Deere is going in the opposite direction. I know some of my neighbors run their cylinder speeds higher than I do to promote the "flywheel effect" to carry them through these slugs. Part of this problem is due to uneven feeding which should be corrected at the head. Full fingers (F Series) and proper adjustment of the auger can help a lot also.

It's a bit confusing when you look at their site. If you bring up the main spec's page it lists the 6.8, but if you click on the PowerTech engine it lists the 8.1 for the 95 and 96. You obviously have more accurate info than I do. I do think you would notice a difference between your 9500 and a 10 series. I sure have, but my 9500 was also an earlier model than yours ('93). I'm like you in that I'd rather see them stick with the bigger engine, but it does seem to be a trend among quite a few of the companies to go with smaller, 'hotter' (for lack of a better term) engines. Not sure if emissions have anything to do with it, but it's a possibility.

OK, what is the big difference between "early" 9500's and the 9510 besides horsepowerIJ Do you really enjoy greasing those walker bearingsIJ Just wondering.. GS