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Hydraulic Pump Pt III


 
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ErnieD
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Joined: 22 Sep 2009
Posts: 269


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PostPosted: Wed Nov 27, 2013 6:39 pm    Post subject: Hydraulic Pump Pt III Reply to specific post Reply with quote

Recap: Bought a 871 with a hydraulic pump gear stripped on the pump shaft. New gear, shaft, seal, needle and roller bearings. Pump worked but hammered at rpm > 1200. Rebuilt pump head, new gaskets, valve seats, ball bearings and spacer/spring plate. Installed per shop manual instructions. Pump still hammers and loses prime overnight.

I did a close visual inspection and could find no cracks. There is no oil leak, so it must be leaking air on the suction side of the pump... .
I am going to pull the pump and permatex the o ring on the suction side.

Looking for any hints....
 
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souNdguy
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Joined: 20 Aug 2002
Posts: 53811


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PostPosted: Thu Nov 28, 2013 3:13 pm    Post subject: Re: Hydraulic Pump Pt III Reply to specific post Reply with quote

wobble shaft worn where seal rides?
 
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