Mailing List lml@lancaironline.net Message #70160
From: <marv@lancair.net>
Subject: Re: [LML] Oildyne Hydraulic Pump Rebuild?
Date: Mon, 09 Jun 2014 07:47:21 -0400
To: <lml>



Posted for "William Rumburg" <lancair403@verizon.net>:

> John-
>
> Don't let the 80's/90's piece of crap design Oildyne pump spoil your flying
>experience and all the work you've accomplished. It's NOT worth it, remove it
>and throw it in the nearest dumpster!
> I purchased a new pump for $1400 in 2005, correctly guessing that Oildyne
>had re-designed it to correct the earlier problems. The new pump is SWEET, it
>retracts the gear simultaneously, in half the time and I've never had a
>problem with it : )  : )
> Also, I abandoned the horrific location behind the baggage bulkhead - that
>Lancair originally specified. I created a hard spot and installed the new
>pump on the side of pushrod tunnel, directly behind the pilot where it should
>have been all along (photos attached)
>
> Bill Rumburg
> N403WR  (Sonic bOOm)
>  ----- Original Message -----
>  From: John Cooper
>  To: Lancair Mailing List
>  Sent: Friday, June 06, 2014 4:06 PM
>  Subject: [LML] Oildyne Hydraulic Pump Rebuild?
>
>
>  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
>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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