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Marker changer on a JD 494-A planter

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Plow Man

05-23-2001 20:21:35




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I was just wondering if anyone knew how the markers switch on the 494-A John Deere planter when turning. I know that something much switch and lock when the tractor turns, and I've seen the pulley that lifts the markers with the chain. So basically I want to know is,how does the one marker go down and the other stays up? Then changes over to the next by turning on the headland. (A picture would also help if one is accessable.) Thanks!

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Joe

05-28-2001 18:38:41




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 Re: Marker changer on a JD 494-A planter in reply to Plow Man, 05-23-2001 20:21:35  
We have a 495A planter. There are 2 chains that attach to a bracket on the drawbar. When you turn, the bracket will pull one of the chains, which will flip a small metal "switch". this "switch" will hold one of the markers from going down.



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Plow Man

05-30-2001 19:31:54




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 Re: Re: Marker changer on a JD 494-A planter in reply to Joe, 05-28-2001 18:38:41  
Joe, would the chain have like a knot or something in it. Then the latch would have like a fork or something to hold the chain back so the certain side doesn't drop, but the other side has enough slack to go all the way down?



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Steven M

05-24-2001 15:54:13




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 Re: Marker changer on a JD 494-A planter in reply to Plow Man, 05-23-2001 20:21:35  

I have a 1240 planter and the marker control works the same way as on a 494-A There is a small chain that goes from a bracket that bolts onto the drawbar of the tractor,its one chain,but its on both sides of the drawbar,it goes back through a chain guide,in the center it connects to a latch.If you want a picture go to your John Deere dealer and ask to see a 494-A parts catalog they will be glad to make a copy for you

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