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John Deere Tractors Discussion Forum
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Remote cylinder

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KHE 70

02-08-2005 20:21:31




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Were all the remote cylinders made by John Deere for two cylinder tractors pretty much the same or were they different when compared with the letter series tractors vs. the numbered series tractors. I have a 70 D and would like to get a JD remote cylinder to go with it. I have found one but don't know if a specific remote cylinder went with a specific tractor.

Thanks, KHE 70




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Steve Crum

02-09-2005 07:43:18




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 Re: Remote cylinder in reply to KHE 70, 02-08-2005 20:21:31  
The biggest thing to be careful of is system pressures. Our farm had Deere tractors for the better part of 60 years, so the hydraulics technology advanced over the years and cylinders designed for each tractor of course intermixed on various tractors and machinery. (all the hydraulics on the 2 cylinder tractors were changed over to HyGard oil). The old stop rod cylinders for the number series did not fair well on new generation tractors and the cylinders for the early number series ie; model 50 were not really heavy enough to handle the new generation pressures either. Usual failures were blown seals.
Cylinders designed for new generation tractors worked pretty well on everything, the only short coming of these was the smaller bore for high pressure didn't have near the force on the 800 pound systems on a letter series tractor. So your best bet would be to find a cylinder from the new generation era which looks just like the cylinders for the 20 and 30 series tractors, and you'll have one that will handle pressures that most any tractor runs.

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Mike M

02-09-2005 07:15:10




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 Re: Remote cylinder in reply to KHE 70, 02-08-2005 20:21:31  
There are several different diameters. You will need a larger one with that 70D to be able to handle the larger equipment.



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jhill

02-09-2005 05:53:12




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 Re: Remote cylinder in reply to KHE 70, 02-08-2005 20:21:31  
The cylinders for letter series tractors had external mechanical depth stops. These were 2 heavy rod on the the outside. The cylinders for numbered tractors have a hydraulic stop. There is a rod that extends out the end ot hr cylinder nad hit an adjustable stop on the cylinder rod controlling depth.



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Jim Dunn

02-09-2005 03:09:15




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 Re: Remote cylinder in reply to KHE 70, 02-08-2005 20:21:31  
Don't know all there is to know about cylinders, but have some experience with them. If you haven't bought yours yet, be sure it has a by-pass valve in it. Some didn't and once you set the "travel stop" you were limited to the amount of drop at that point. The ones with the bypass allowed you stop the drop at a given point but them gave you the ability to draw it down a little more to lower the impliment a little further. This can come in handy to inch down some on harder ground and apply a little more weight in tough spots. Real handy when plow shares started showing signs of wear. I would also examine the "stop" for broken parts and make sure the shaft is not pitted. A pitted shaft will take out the seal and develop a leak. I saw one at a sale where someone must have done some welding close to an extended shaft and it had a lot of weld spatter on it. No way that seal could last long after that. If you must weld close to one with the shaft extended, at least cover that part of the cyl.

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