I ran a 6620 for 10 years. It is a decent machine but we had to repair alot. Finally gave up and bought a used 9500. Made that 6620 look like the threshing machine. We had many of the same problems mentioned here! What was the last straw was the counter shaft bearing behind the big pully. I collar came loose and the shaft turned inside the bearing. Of course you can't see any of this. Eventially the combine would shake at certain RPMs. And about the same time I left the fuel cap off.... It was towards the end of corn so we rented a 9500 to finish up. Next year we parked the 6620, sold the engine to a guy to put in his tractor, sold the chopper and some other parts, still have some good parts there. Still using the same corn head, 643, only have had to replace chains and lower sproket/bearings.
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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