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John Deere Tractors Discussion Forum

Re: 520 power steering

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Author  [Modern View]
Andy R

06-23-2020 21:04:05

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I just finished my John Deere 730 row crop. All of the seals and gaskets including the seals for the vanes were probably under $70. Local dealer actually had most everything in stock. Basically there is an "O" ring and paper backer below and above what I think they call the cylinder, a cork seal at the very bottom below the thrust bearing, and a couple gaskets under the steering valve casting which also act as shims. Also, the rectangular seals on the vanes. I warmed the vane seals up in boiling water and used a small screw driver to work them over the vanes. They seem to cool off very fast. I didn't break any although I have been told by a two cylinder mechanic that he commonly will break one. That just about covers it. The same John Deere mechanic that does quite a few of these power steering units said that the thrust ball bearing as well as the other two sleeve bearings are rarely worn enough to require replacement. I did have to buy one more shim washer that goes under the sector gear to arrive at the correct end play on the spindle. I thought the John Deere power steering oil was priced high at around $8.50 - $9.00 a quart or so. But then I got to looking at quarts of power steering fluid at automotive parts places and some cost more than the John Deere oil. So, John Deere two cylinder power steering oil went back in. The power steering rebuild wasn't really very hard to do. Good luck.

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