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Combines & Harvesters Discussion Forum

Raddle chain question

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FordTractorMan

09-22-2006 11:35:14




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Just about finished with corn last night, had one pass about half the length of the field and that was it. Heard the awfulest racket underneat the cab and discovered it was the raddle chain slip clutch. Raddle chain is full of corn and evidently won't turn. Neighbor who knows Gleaners says a cob could be between a sprocket and the chain. Anyone else have this problem before? Brought 'er back to the shed last night as it was dark-thirty. Figure I'll try to clean it out this weekend and see what I can find. Any sage thoughts appreciated.

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K-Stater

09-23-2006 18:09:49




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 Re: Raddle chain question in reply to FordTractorMan, 09-22-2006 11:35:14  
Hopefully its just a cob, but if it's not check for a bent slat. When we had gleaners and that happend, it was either the chain being shot or a bent slat. Good luck.



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JMS/MN

09-22-2006 17:06:51




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 Re: Raddle chain question in reply to FordTractorMan, 09-22-2006 11:35:14  
If you haven't yet checked out the raddle chain- lock the header up and pull the front access panel off. Loosen the tighteners for the front bearings/rollers. If they are worn- replace them now. ($8-12 each?). If they break under power they will rip up more than you want to know about. Same rollers as used on orange corn heads, I think some are on black heads as well. So put new ones on the combine and save the used for the head. If they go bad there- no damage. If you completely loosen the tighteners, you can replace rollers without separating the raddle chain. Also check the chain for wear- flat spots underneath as well as front/back looseness in the links. Broken chains are no fun- replace before, hook new to old, turn machine by hand to install the new one.

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JMS/MN

09-22-2006 16:33:16




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 Re: Raddle chain question in reply to FordTractorMan, 09-22-2006 11:35:14  
Yes, that can certainly happen- just a small chunk of cob can get under the chain and tighten things up enough at the back end of the raddle chain. All depends how tight you keep the slip clutch. I like to run them just enough to carry the load- then if a cob gets in, it will shut down. Beats having a rock or other chunk really mess something up. Should be able to see it through the access doors, and pry it out with a screwdriver. Not a common problem, but I've had it happen a few times over the last thirty years. That's why I always carry a pipe wrench and flashlight in the combine tool box, along with basic wrenches and a socket set. Easy to back off the shaft and pry out the culprit, dark-thirty or whenever. If you set the cylinder to keep the cobs whole, it is less likely to happen.

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Allan In NE

09-26-2006 02:38:48




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 Re: Raddle chain question in reply to JMS/MN, 09-22-2006 16:33:16  
I dunno,

Must be different strokes for different folks in different areas.

That slip clutch ought to pull right thru a cob(s) and snap it. Rule of thumb around here is to never, ever grease a slip clutch, as they've got to run dry.

Once you do, the darned thing will never hold or pull right again.

Allan



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Allan In NE

09-22-2006 14:23:28




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 Re: Raddle chain question in reply to FordTractorMan, 09-22-2006 11:35:14  
By Golly,

I think we're reachin' a bit to hope that it is a mere cob.

Pull the two side doors and the raddle cleanout door. Let's hope it is just a broken chain or has a frozen bearing and let's also hope it hasn't tried to rip the floor out of the conveyor table.

I keep a real close eye on that raddle chain/adjustment/bearings 'cause it is so darned hard to access.

Allan



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JMS/MN

09-22-2006 17:11:22




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 Re: Raddle chain question in reply to Allan In NE, 09-22-2006 14:23:28  
Should have mentioned in the earlier post that yes, cobs can be on the bottom end- carried around the raddle chain and stuck next to the roller. I've never had a broken chain, don't want one- that is more grief- remember watching a custom operator with the old wooden slats. No fun at all replacing that when broken!



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