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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

JD 410 Backhoe cylinder question

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lenray

10-24-2007 15:12:47




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I have a 1977 410 hoe that I was pushing a tree with the backhoe bucket in a backwards motion somehow.
The threaded part of the cylinder popped off.
It will screw back on and tighten up real well but will not hold--the treads must have been pulled some.
I was wondering if a guy could weld it if it is ruined already .
The only time it would have to come off is if the gland packing or O ring were to leak.
Looking for some advice.
Thanks

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DYNAHATER

11-03-2007 10:39:40




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 Re: JD 410 Backhoe cylinder question in reply to lenray, 10-24-2007 15:12:47  
There are as many different ways to fix this as your mind has creativity. I'd take it apart and get the gland out of there and weld something to the outside of the cylinder itself. Something that would allow the cap to be held down securely to the cylinder end. I'd probably make a new cap that used most of the surface area of the old cap but extended past the edges enough that it could be bolted securely to whatever you weld onto the cylinder. I'd design it so it can be welded without any parts left inside and so it could be serviced too.

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135 Fan

10-24-2007 16:00:43




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 Re: JD 410 Backhoe cylinder question in reply to lenray, 10-24-2007 15:12:47  
Maybe you could get some locktite thread restorer that would repair the threads and then use locktite so it doesn't come loose again. Maybe bearing seal would work as well. Then it could still be taken apart if necessary. If you're not keen on that idea, then I would suggest welding ears on the sides of the cap and then welding some ears on the cylinder to bolt to. You would want to have the cylinder mostly retracted so the seals on it wouldn't get damaged but the seals in the cap might no matter what you do. When welding I wouldn't do everything at once. I'd weld a bit and let it cool. If you had 4 bolts should hold it and it could still be taken apart. You'ld only need about an inch of weld on each ear if it was done right. Actually it would be a good application for MIG welding as it has less heat than stick and is a faster process. Dave

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fordtractor2000

10-24-2007 15:28:12




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 Re: JD 410 Backhoe cylinder question in reply to lenray, 10-24-2007 15:12:47  
i have seen this done before, my boss did the same thing, you CAN weld them but you have to be real careful not too get things too hot to melt the seals but hot enough to get a good bead, also has to be clean of oil or that will mess you up, seen people try to weld angles over the cap to keep it on also, in all of the above unless you rarely use it you better find a new tube and redo the packing while you have it apart

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