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Date: Fri, 06 Jun 2014 16:06:48 -0400
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From: John Cooper <snopercod@comporium.net>
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Subject: Oildyne Hydraulic Pump Rebuild?
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I've spent the last couple weeks adjusting the up and down stops on the 
hydraulic cylinders. Now that the new spool pieces have arrived from 
Lancair, that task is almost complete; But now my hydraulic pump is 
acting weird. (It's almost 30 years old, so that's not surprising.) 
Today while I was cycling the gear up and down, sometimes the gear 
wouldn't come down with the pump running in the "down" direction. Not 
good. I don't know whether that was just due to air in the system, or 
something sticking in the pump itself. Obviously, I need to buy the 
pressure gauges from Grainger so I know what's going on, but should I 
also plan on going through Chris Zaveston's procedure 
<http://www.n91cz.net/Hydraulics/Lancair%20Hydraulics.pdf> and spend a 
month rebuilding this pig? Where would I even obtain the rebuild kit?

I seriously regret that I installed my pump _behind _the baggage 
bulkhead. What was I thinking??? If I have to rebuild it, I'm moving it 
to the _front _side along with the pressure switches.

Yet _another _detour on the road to my first flight...

--John

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    I've spent the last couple weeks adjusting the up and down stops on
    the hydraulic cylinders. Now that the new spool pieces have arrived
    from Lancair, that task is almost complete; But now my hydraulic
    pump is acting weird. (It's almost 30 years old, so that's not
    surprising.) Today while I was cycling the gear up and down,
    sometimes the gear wouldn't come down with the pump running in the
    "down" direction. Not good. I don't know whether that was just due
    to air in the system, or something sticking in the pump itself.
    Obviously, I need to buy the pressure gauges from Grainger so I know
    what's going on, but should I also plan on going through <a
      href="http://www.n91cz.net/Hydraulics/Lancair%20Hydraulics.pdf">Chris
      Zaveston's procedure</a> and spend a month rebuilding this pig?
    Where would I even obtain the rebuild kit?<br>
    <br>
    I seriously regret that I installed my pump <u>behind </u>the
    baggage bulkhead. What was I thinking??? If I have to rebuild it,
    I'm moving it to the <u>front </u>side along with the pressure
    switches.<br>
    <br>
    Yet <u>another </u>detour on the road to my first flight...<br>
    <br>
    --John<br>
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