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520 Power Steering Pump


 
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Gary Puckett
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Joined: 24 Sep 2012
Posts: 21


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PostPosted: Mon Sep 24, 2012 5:58 pm    Post subject: 520 Power Steering Pump Reply to specific post Reply with quote

Using the great information from this site, I re-built my 520 power steering pump. I used a brand new fan shaft, installed new bushings, new seals, two on each end "back to back". The pump works great, but still leaks on the front end, fan side. I am using the John Deere power steering fluid for tractors built before 1960. I was clean and careful with the seals. What would you try next? I cannot stand a leak.
 
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MrJDMan80
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Joined: 11 Feb 2008
Posts: 323


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PostPosted: Mon Sep 24, 2012 7:08 pm    Post subject: Re: 520 Power Steering Pump Reply to specific post Reply with quote

Do it again. Its easy to knock the spring off on the front seal during assembly. Just try it one more time
Tim
 
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Mike M
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Joined: 31 Mar 1998
Posts: 19295


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PostPosted: Tue Sep 25, 2012 5:14 am    Post subject: Re: 520 Power Steering Pump Reply to specific post Reply with quote

I use my press and try to carefully push the seals into place. Seals today are so flimsy they can can distort easy and this seems worse for me when I try and drive them into place. This may or may not be an issue here ? I also clean off the outsides of the seals and put a hardening type of sealer on them so as they don't get backed out with some back pressure.
I also cover the splines with an old microfiche card to protect the seal lips as I slide it together.
 
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DONMYEIL
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Joined: 14 Oct 2004
Posts: 989


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PostPosted: Tue Sep 25, 2012 5:25 am    Post subject: Re: 520 Power Steering Pump Reply to specific post Reply with quote

If by chance you put them too deep and closed off the drain hole .
 
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