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Deere 6620 - Vittetoe chaff spreader turning very slow

A

andy r

Member
Yesterday while I was hauling and my son running the combine I noticed the Vittetoe chaff spreader was turning so slow that it wasn't throwing anything off. Fortunately we were doing corn so there wasn't much material build up. Seems like it would almost come to a stop and and then have a little energy to turn. I would assume it is either the little pump that also runs the reel or the orbit motor under the chaff spreader. Has anyone ever experienced this problem? I guess I could take the corn head off and pull up to the soybean platform and see if it will run the reel properly to test the pump. Amother thing I noticed is that the spreader seems to turn freely by hand. I thought orbit motors always had some resistance. Hydraulic tank is full and all of the other hydraulic systems operate that operate off of the big pump run fine. I did try adjusting the flow valve back by the spreader with no result. Thanks.
 
I should add that two days ago the hydraulic temperature alarm/light went off on the console. The chaff spreader was completely full and had stopped. A cob might have gotten stuck between the disk and the guard. After everything cooled down the alarm/light went away and it never happened again since. It says in the operators manual to always connect the reel hoses when combining corn. Just thought that maybe when the spreader stopped that it could cause the problems with the pump as well. Also is there a bypass valve on that pump that could be stuck?
 
Boss just did this yesterday on his 7720. The only reason the book says to hook the reel drive hoses together with the corn head on is because that chaff spreader was never part of the circuit from the factory. If you dont have the spreader and you dont hook the reel hoses together you will dead head the pump and start breaking things so you hook the hoses together to create a loop and the oil just circulates. Now that you added the chaff spreader there is a second path for the oil to take. Oil like anything else follows the path of least resistance. So if you hook the reel drive hoses together there is a lot less resistance to flow for the oil to just run the reel circuit loop rather than trying to turn the chaff spreader motor. Long stories short. Unhook the reel drive hoses from each other to force oil flow to the spreader.
 
Figured out the problem the next morning. The dial that controls the speed of the reel had gotten turned completely down. Turned the dial to mid range and the chaff spreader worked perfectly like it should. Hoses that run the reel are either hooked together for corn or connected to the hoses from the grain platform. I knew that they both ran off of the same hydraulic pump, but I didn't think the dial in the cab had any effect on the spreader but it did.
 
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