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Hi Danny;
No I did not hone and deburr the cylinders. I have no
tool to easily do that and indeed saw no need unless in the way of the circlip
grooves.
Would the pump experience a leak across the shuttle valve if
it was going to leak and how would you test for that?
Once we blanked off the offending cylinder by a process of
elimination the pressure loss stopped. I have gauges on the HP and LP
sides to help me.
I too thought the repair was easy and have done more
than few in my time but this one is a little perplexing!
Do you know of a good hydraulic shop near you who would repair
and test the cylinder?
Regards
Ian
----- Original Message -----
Sent: Tuesday, October 09, 2012 8:06
AM
Subject: [LML] Re: Hydraulic cylinder
main gear Lancair 320
I’m
not. I’m just saying they’re easy
to repair. When you replaced the
seals did you hone & deburr the cylinder? Have you checked the pump for an
internal leak?
Danny
LNC2-360,
650 hours
N
38° 43' 25.7"
W
77° 30' 38.6"
From:
Ian Crowe [mailto:ian.crowe@sympatico.ca]
Sent: Monday, October 08, 2012 1:44
PM
To: lml@lancaironline.net
Subject: [LML] Re: Hydraulic cylinder
main gear Lancair 320
Didn't
know you were in the cylinder repair business!! It is the actuating
cylinder that is giving the problem. I have rebuilt it twice and it
lasts for a while and then starts to leak again across the piston. No
sign of any other leaks anywhere and we have blanked off all the other
cylinders and the pump still cycles. So it must be the cylinder.
I have
actually sold the plane to my flying buddy who did all the initial flight
testing for me but am helping him with the maintenance now and
again
-----
Original Message -----
Sent:
Sunday, October 07, 2012 6:15 PM
Subject:
[LML] Re: Hydraulic cylinder main gear Lancair
320
Ian,
Are you
looking for an actuating (gear up & down) cylinder or an oleo suspension
(Ong debonger type) cylinder? I
have actuating cylinders that can be rebuilt and I’ll even do it for
you. I have no oleo struts but
if yours need to be rebuilt I’m sure it can’t be
difficult.
Danny
LNC2-360,
650 hours
N
38° 43' 25.7"
W
77° 30' 38.6"
Does any
one have a spare main gear cylinder for sale?
Does
anyone know where they can be repaired successfully or failing that where
new ones can be bought?
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