With the prices they way they are ,going to look at a 9510,and keep the 6620 for a spare. Is their anything you guys can tell me to look at?I know to look at the straw walker bearing hopefully they been switched to wood. Not quite sure what size grain head to look at either. we still have a 215,but that'll stay with the 66.Thanks
 
now im not sure on the 9510s but i know that the 1999 9610 deers had bad trouble with rod bearings and pistons. ours had 2200 hrs on it and shucked the motor and iv heard of several more doing the same thing, Deere has a kit out for it i belive, so if it is 1999 model make sure that it has been rebuilt. Someone please correct me if im wrong if it was just the 9610s.
 
TDS, I do remember we had a customers 9610 a few years back have to rebuild the engine because of a melted and gaulded piston. I am not sure of a problem with them though. We didnt have alot of them out. More 9510's than 96's. 20 - 25 foot grain head would match a 9510 very nice. Some around our area even ran 30 foot. We have a 9410 and ran it for 3 years now and absolutley love it. We run a 20 foot and it runs it nicely. You will like the comfort over the 6620. We thought we could never part with the 4400. We were wrong!!!
 
I've got experience with 2 Deere 9510s. On the 1998 with the "big engine" we run a 30 foot platform doing beans. You can run anywhere from 3.0 to 4.5mph depending on the quality of the crop. On the 1999 with the lower horsepower we run a 20foot. It is not enough head to challenge the machine, you run out of cutter bar speed before you run out of power or capacity. The 1999 is also the one that does the wheat in the summer. For corn we run 6 rows on both. Run about 5-5.5 after that it’s too much ground speed for the header, leaves 13 foot snakes standing 6 feet tall.

Other than the walker bearings, look at the floor of the rain tank, the 99 has a hole in the bottom right near the unloading auger about the size of a quarter. Look at the big arm the drops down for the unloading auger engagement. The 98 had the hinge crack and the arm shifted enough to have the shaft cut a hole in the outer sheet metal. The 98 the hydraulic pump cracked at one of the fittings and needed to be replaced, core was junk. Other than those problems it’s just been basic combine stuff, chains, belts and hoses.

Both machines have about 2600 engine 2000 separator hours.
 
We never had a 9500 or 9510 but after experience with 9400s an 18ft head was too small for them most of the time. We ran out of header speed a lot. It seems slow most of the time with a bigger header but we should have had a 25ft on the 9400s and slowed down when needed. Around here a 9510 would handle a 30ft fine. We have a 9770 now and it plays with a 30ft. Thankfully it will cut very well at 6.5mph or we would need a 45ft to keep it full. Beans weren't good here this year though, topping out for us at about 35bpa.
 
My cousin upgraded to a 9400 from a 6620 in 1997. All of these comments are correct. You will quickly learn how to combine fast for proper thrashing. Watch for fan air intakes to plug. Clean them at least 2 or 3 times a day.
 
We went and looked at the 9510,st lawerence eq. had it.they bought it from a farm in iowa.2100 hrs and lower seperator hrs,forgot how many.clean machine,asking 72,000. not sure if thats good or not. the big drive shaft that runs threw the grain tank,it runs all the feeder house and head. any problems with that at all,grease able zerks?what a difference in machine from a 6620 .thanks for the inputs.steve happy new year to all of our Armed forces.
 
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