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John Deere Tractors Discussion Forum
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1956 420w John Deere hyd. help

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Gene

02-27-2004 18:25:14




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I have a 1956 420w John Deere Tractor. The suction line right where it goes up through the dash leaks terribly. We tried to tighten the bolts on the plate but made things worse. Is the seals still made for this and what are they called? Have a manual but could not find enything on this. We also replaced the rear lift arm seals where the 3pt hitch bolts to the housing.
Arms still leak what can we do for this problum could it be becouse of the line leting air in the system? Thanks all help is greatly appreciated R.G.F

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Gene

03-01-2004 17:20:14




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 Re: 1956 420w John Deere hyd. help in reply to Gene, 02-27-2004 18:25:14  
Thanks for all your help really appreciate it.
Thanks Gene



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Ray

02-27-2004 18:50:46




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 Re: 1956 420w John Deere hyd. help in reply to Gene, 02-27-2004 18:25:14  
Those are cork seals on the suction line,pretty
easy to replace and available from JD,so are
the rockshaft seals.If the bushings in the
rockshaft housing are wore bad new seals will
still leak.If you have dual touchomatic there
are 3 seals to replace,single touchomatic has 2.



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Dan

02-27-2004 18:45:54




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 Re: 1956 420w John Deere hyd. help in reply to Gene, 02-27-2004 18:25:14  
Not sure if that is a seal or O ring, Should still be available from JD. The leak around the rockshaft seals is typical of these from what has been said here. Have not had the problem on my 430 but a lot of guys here talk about it. Doesn't seem to be a whole lot to do for it.



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Wayne in Tn.

02-28-2004 03:37:37




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 Re: Re: 1956 420w John Deere hyd. help in reply to Dan, 02-27-2004 18:45:54  
Gene, those seals for the line are still available from Deere. They look like a slice off a heater hose.
As to the rockshaft leaks, if new seals did not stop the leak, you can have the housing machined to accept the late model 430 bushings. Yours will not have bushings in it, therefore the shaft just rides on the housing and will wear it egg-shaped. If this has happened, new seals will not help much. Deere finally deceided to solve this problem on the last serial numbers of the 430.

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