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Implement Alley Discussion Forum

john Deere 14T baler keeps breaking chain

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Tim_in_IA

07-27-2005 08:58:06




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I've been working on getting a 14T baler back in working condition. When I got it it kept shearing bolts, and I determined it was out of time. I retimed the baler and then it worked for 3 bales or so and then broke the right needle off. After looking at it I realized that the chain that powers the knotters had broke at the connecting link. This left the needles up and the feeders came down and broke it off. So I replaced the connector link in the chain, checking to make sure the timing was still good, and replaced the broken needle. Ran the baler for about 15 bales, about half of which did not tie properly on the right side, and then it started shearing bolts again. Checked it over and it was out of time again in the rear section (knotters, needles). Bolts are shearing as push plate hits stop. So I retimed it again and started it up and heard a loud crack, and sure enough the right side needle is bent (the new one I just replaced!!). Now since the rear is going out of time so fast, I am guessing that I need to replace that rear chain. The feeders and the push plate stay in time with each other. My two questions are, 1. will replacing the chain keep this thing in time, and 2. why does this chain keep snapping!! Could the knotters be doing this?

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havvey

07-27-2005 18:02:48




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 Re: john Deere 14T baler keeps breaking chain in reply to Tim_in_IA, 07-27-2005 08:58:06  
all the above are correct but there may be other shafts/gears worn i doubt its the chain unles too long short etc. its may be cheaper to find a good 14t and use your for parts.



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RickB

07-27-2005 16:58:23




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 Re: john Deere 14T baler keeps breaking chain in reply to Tim_in_IA, 07-27-2005 08:58:06  
Make sure that knotter drive chain has the proper number of links when you replace it. Almost sounds as if it is a link short.



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jd68

07-27-2005 13:58:48




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 Re: john Deere 14T baler keeps breaking chain in reply to Tim_in_IA, 07-27-2005 08:58:06  
It"s always tuff to diagnoise a baler if you can"t actually be there to chk it over and bein it"s a 14T, it"s old. That all being said I"m pretty sure the drive paul in the knotter trip assembly is worn out. It gets rounded over and as the knotter is in cycle the drive latch slips past the drive dog which causes the whole knotter assembly to stop moving. The part that I don"t understand is why the safety latch is"nt stopping the plunger before it hits the neddles.
You really need to be sure the safety latch is working correctly.

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jd68

07-27-2005 13:56:01




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 Re: john Deere 14T baler keeps breaking chain in reply to Tim_in_IA, 07-27-2005 08:58:06  
It"s always tuff to diagnoise a baler if you can"t actually be there to chk it over and bein it"s a 14T, it"s old. That all being said I"m pretty sure the drive paul in the knotter trip assembly is worn out. It gets rounded over and as the knotter is in cycle the drive latch slips past the drive dog which causes the whole knotter assembly to stop moving. The part that I don"t understand is why the safety latch is"nt stopping the plunger before it hits the neddles.
You really need to be sure the safety latch is working correctly.

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Tim_in_IA

07-27-2005 17:30:34




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 Re: john Deere 14T baler keeps breaking chain in reply to jd68, 07-27-2005 13:56:01  
It's not the plunger that is breaking the needles, it's the feeders. The chain is breaking and the needles are remaining upright, but the feeders come in from the side and blammo.

I'll have to look up the drive paul as I am not sure what that is. The trip dog roller is the hump on the inside of that clutch right? My manual doesn't show it, but that's the only thing that it could be.



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Tx Jim

07-28-2005 03:36:28




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 Re: john Deere 14T baler keeps breaking chain in reply to Tim_in_IA, 07-27-2005 17:30:34  
Tim,the feeder fingers are in frt. of needles and can't break,bend or touch them.The plungerhead stop is not working properly as previously stated or needles would not get bent/broken. I agree about checking for correct number of links in chain.How sharp are the teeth on the needle drive sprockets? Is the pin that secures the plungerhead to crank rod in correctly? Tx Jim



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bigJ

07-27-2005 18:14:44




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 Re: john Deere 14T baler keeps breaking chain in reply to Tim_in_IA, 07-27-2005 17:30:34  
You got me thinking now. I don't remember that the feeder fingers can hit the needles. I have to go look at mine to see that. Will let you know how mine looks. Just from memory, I think the needles are farther back in the chute and can't be touched by the feeders. You should know though, you are looking at it and I am not.



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Tim_in_IA

07-28-2005 04:02:41




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 Re: john Deere 14T baler keeps breaking chain in reply to bigJ, 07-27-2005 18:14:44  
The plunger stop does come up when the needles are home. That's how I know it is getting out of time, because then the bolts start shearing as they should. Only the right needle breaks and it is near the end of the needle and it only happens after the roller chain snaps. I think a little bit of the needle is vulnerable to the feeder at a certain point of the cycle. When the needles bend or break, there is always a definite twist to them like something came from the side. I just assumed it had to be the feeders. The left needle is never damaged. You would think that if it was the push plate that both needles would have similar damage.

I have a funeral to go to today but I will try to look tonight or tomorrow. The baler is at my dad's. I'll try to take a few pictures if I can get some good ones.

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rla

07-28-2005 04:40:19




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 Re: john Deere 14T baler keeps breaking chain in reply to Tim_in_IA, 07-28-2005 04:02:41  
The packer fork can"t hit the needles? The plunger should be fully extended when the needle
is in the tieing cycle. If the notter drive
chain is short, it"s possible after a few tieing
cycle"s things will get all screwed up & then
maybe somehow the packer fork may hit?



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TimS

07-29-2005 13:09:37




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 Re: john Deere 14T baler keeps breaking chain in reply to rla, 07-28-2005 04:40:19  
Something must be binding up in the knotter or needle mechanism to keep breaking that chain.

Take the needles off completely until you get the knotter chain to stop breaking...put the tractor at idle, start the pto, then stand back there and trip the knotters over and over until you figure out what is binding/breaking that chain.

Something is probably worn and causing that problem...



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