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JD 50 Power Steering

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Kerry Miller

08-07-2000 11:12:44




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Two questions:
1. What kind of oil should I use in the power steering? The I&T book gives a JD number but I don't know what it is.
2. I have a few minor propane leaks, should I use any kind of pipe dope on the connections or just leave them dry?




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Ron

08-07-2000 11:50:46




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 Re: JD 50 Power Steering in reply to Kerry Miller, 08-07-2000 11:12:44  
The power steering oil is still available from a John Deere dealer. Don't have the number handy, but tell them it's for the old two cylinders and they know what that is. I know as I just bought a full oil change for my 50 power steering.
Sorry, I don't know about propane leaks.



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jonathan (For RON)

08-07-2000 18:45:51




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 Re: Re: JD 50 Power Steering in reply to Ron, 08-07-2000 11:50:46  
Ron, does the 'right' oil make that much difference. My 720 was low and I topped it off with the same hy-trans fluid we use in the newer tractors. The oil in the 720 was red, so I suspect it was not origianal stuff anyway. Compaired to my friends 730, my power steering is real sluggish and requires more steering input. Does oil affect this, and adjustment, or just old age?

Thanks
Jonathan

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Ron

08-08-2000 08:20:15




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 Re: Re: Re: JD 50 Power Steering in reply to jonathan (For RON), 08-07-2000 18:45:51  
I'm not an expert on the old 2 Cyl power steering, but I do have the JD power steering service manual for those units. I'm not sure of the properties of the Hy-tran fluid versus properties of this "special" power steering oil. Maybe there is a lubrication expert lurking here who could tell us. The JD oil isn't terribly expensive and my 50 only needs 5 quarts so I used it. But I can't say it will make any difference.

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Chuck

08-07-2000 20:15:03




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 Re: Re: Re: JD 50 Power Steering in reply to jonathan (For RON), 08-07-2000 18:45:51  
I've overhauled several of the power steering units. What causes them to get lazy is the vane seals(square rubber) and oil bypasses...the steering valve being activated is what causes the movement, when you are using a lot of pressure you are twisting the worm gear...and you will eventually damage the control valve....need to pull the pedistal apart and install seals...I have some photos if anyone is interested.....

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Idaho Curt

08-08-2000 12:08:27




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 Re: Re: Re: Re: JD 50 Power Steering in reply to Chuck, 08-07-2000 20:15:03  
I just did an oil change on my 630 a couple of months ago. The stuff that I drained out was brown and smelled bad (burned). I don't know how long it had been since it's last PS fluid change. When you change the fluid make sure you get all you can out of the bottom where the vanes are. The I&T manual details this procedure quite well. I used ATF per Chad Wink's (Lube. Eng.) recommendation and have been very happy with the results. You should do a search of the archives on oil, there have been quite a few discussions on this topic. Also I adjusted the worm gear endplay and clearance (did not touch the vanes). I followed the steps in the I&T manual for adjusting the power steering. Before I made these changes the steering would lock up when I was trying to turn the wheel back straight from a turn. It did this a few times after the oil change and adjustments but after a couple of weeks it is now completely gone. I suspect but don't know for sure that the ATF is making the vane seals soften or swell thus getting rid of the dead spot I had in the steering.

Curt

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