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From: "Rumburg, William" <wrumburg@cdicorp.com>
To: "'ByronMFox@aol.com'" <ByronMFox@aol.com>, lancair.list@olsusa.com
Subject: RE: Flushing Hydraulic Lines
Date: Wed, 2 Feb 2000 15:34:04 -0500 
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Yesterday, I removed the hydraulic pump from my LNC2 to be sent for overhaul  by Oildyne.  The hydraulic fluid I drained from the reservoir was cloudy and  contained what I <snip>
 While the pump is away, I would like to purge and clean the hydraulic  
Has anyone in Lancair Land evolved an efficient means of doing so?I would 
appreciate hearing from you.
Byron.

With regard to flushing your hydraulic lines and cylinders,
you should 
"bite the bullet" and also rebuild your cylinders now.If your system is
that contaminated,the o-rings in all your cylinders will fail prematurely,
if they're not leaking already. You may as well remove and
rebuild them 
now as part of the cleaning process. I obtained rebuild kits
from Lancair 
last Spring and rebuilt all mine. It's not difficult, once you get into it. 
Flushing the lines shouldn't be difficult either, provided that you're
properly set up for it. I would obtain a large plastic "squeeze"
bottle with a sharp tip (you can find them in K-Mart,the one's sold for
dispensing ketchup).Use a length of 1/4" Tygon (same as for your static
lines) to attach the squeeze bottle to an individual line for flushing.
Then attach a length of Tygon at the other end of the line to be flushed
and route it into an empty bottle to receive the hydraulic fluid. 
As an alternative,for some(or all)of your tubing, you could
thread a length of thin lockwire through it, then attach a small piece of
cloth, wetted with hydraulic fluid and pull it back through. Mechanical
wiping is necessary to remove all contamination and you'd obtain the best
job using this method.
Also, thanks for recommending the "vibrating" watch last August
for use as a reminder to turn off fuel transfer pumps before overfilling the
header tank (re: Great Watch for Lancair 320 Pilots, dated August 09, 1999).
I had been looking for just such an alarm!
	Bill Rumburg
	N403WR  (Sonic bOOm)

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