Re: 300 hydraulic pump rebuild

Posted by George Mikesell on June 19, 2005 at 21:58:52 from (209.42.79.128):

In Reply to: 300 hydraulic pump rebuild posted by jmyt_47 on August 16, 2001 at 08:06:55:

Your pump has no gaskets internally, it does have two orings on brass backing pkates, and one on outer case, you can get orings at about any parts store and or buy kit to make your own,Seals also can be gotten at parts stores. As long as your gears are not scored, and the backing plates if scored can be surfaced on piece of glass or flat metal, with 180 grit wet dry paper. The major problem is if the spring backing plate is applying enough tension on brass backing plates to keep pump from bleeding by. If this is a problem you can put in .030 spacer which you have to cut out of brass shim stock or steel. No one provides this it is a home job. It has been my experience that the backing plates get weak over time and need some help, sure wished could buy new ones. Any way this will usually put the pump where it will produce 12-1500 lbs pressure.

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