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44 special hydraulic pump

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Joined: 01 May 2013
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PostPosted: Wed May 01, 2013 8:31 pm    Post subject: 44 special hydraulic pump Reply to specific post Reply with quote

I got my granddads 44special running after sitting for 10 years. He told me the hydraulic pump was out of it. I put some 10wt oil in the tank and everything seemed ok. When I checked the crankcase I found out what he meant. I bought a salvaged pump and after a month it too started leaking back through the shaft seal. In the repair manual it talks about adjusting the valve body at top and bottom, but it is so worn out it is always calling for pressure. Does anyone rebuild the valve bodies?
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David G
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Joined: 11 Jan 2008
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PostPosted: Wed May 01, 2013 8:42 pm    Post subject: Re: 44 special hydraulic pump Reply to specific post Reply with quote

That is pretty thin oil, I would go with at least 30W or hydraulic oil.

I run hydraulic oil in all mine so they will not cross contaminate when I change equipment.
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