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carlmeek(at)gmail.com
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 Posted: Sat Nov 26, 2011 9:04 am Post subject: Leaky Brake Fitting - Some advice please! |
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I had a problem today where the parking brake got stuck on. Normally to release it, I put a lot of pressure on the finger brakes and it unsticks. Unfortunately, something else unstuck first! I must have put a bit too much pressure on the left brake (same one I had bleeding problems with) and it squirted fluid out.
Looks like I need a new nylon compression olive, or perhaps a whole new brass fitting. Any idea where to get these from? They are the much hated jamar (I think that's the name) brakes. Leak was from between the nylon olive ring and pipe itself.
The next trouble is that I need to get to the parking brake valve to put a new handle on it (I snapped it off during my messing about) but I have no idea how to get to it! Its inside the central tunnel, seemingly inaccessible. I might even need to get to this to replace the length of pipe, I suspect it needs refreshing in order to fix this leak.
Thanks for any advice 
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g-iani(at)ntlworld.com
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| Posted: Sat Nov 26, 2011 11:04 am Post subject: Leaky Brake Fitting - Some advice please! |
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Carl
What colour are your brake pipes. If they were supplied by Europa and are black they are 6mm tube. If they are supplied by Europa and clear (white) they are ¼ inch. Brass poly flow fittings are designed for ¼ inch tube. They will (just about) work with the black 6mm tube but can be blown of with pressure or knocked of easily. Europa changed over to the clear (white) ¼ tube when this was pointed out to them. So if you are replacing any tube make sure it is ¼ inch.
As far as I know you cannot buy the olives on there own. You can buy the brass end fitting with the olive and sleeve in it from Aircraft Spruce part No 261-UB-4 . Have a look at the range, search for Brass Poly-flo fittings.
Sorry but I have no magic way of getting at your parking brake valve. I assume you can just about access it from the inspection hatch behind the fuel cock on the starboard side of the tunnel.
Ian Rickard G-IANI XS Trigear, 300hours
Europa Club Mods Specialist
e-mail g-iani(at)ntlworld.com
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carlmeek(at)gmail.com
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| Posted: Sat Nov 26, 2011 11:19 am Post subject: Leaky Brake Fitting - Some advice please! |
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See attached picŠ they are a mix! Looks like black from the reservoir,
opaque white onwards. Thanks for the info, I'll check out Aircraft Spruce.
There is a small access hatch about 8" behind it on starboard side, but no
clear way to access it directlyŠ. I guess I'll have to get mirrors and torch
and try and see if I can service it!
Thanks,
-Carl.
From: G-IANI <g-iani(at)ntlworld.com>
Reply-To: <europa-list(at)matronics.com>
Date: Sat, 26 Nov 2011 19:01:19 -0000
To: <europa-list(at)matronics.com>
Subject: RE: Leaky Brake Fitting - Some advice please!
Carl
What colour are your brake pipes. If they were supplied by Europa and are
black they are 6mm tube. If they are supplied by Europa and clear (white)
they are 1Ž4 inch. Brass poly flow fittings are designed for 1Ž4 inch tube
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frans(at)privatepilots.nl
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| Posted: Sun Nov 27, 2011 5:10 am Post subject: Leaky Brake Fitting - Some advice please! |
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Hi Carl,
| Quote: | I had a problem today where the parking brake got stuck on. Normally to
release it, I put a lot of pressure on the finger brakes and it
unsticks.
|
I'm a bit puzzled by this. My parking brake valve, as supplied by Europa
together with the Jamar junk, has no "feel" in it. I just move the lever
back and forth without any force (there is no detectable friction), and
it doesn't matter whether the brakes are enganged or not. So, if the
parking brake is set it takes no force at all to release it, just a hint
of a fingertip is sufficient.
| Quote: | Unfortunately, something else unstuck first! I must have put a
bit too much pressure on the left brake (same one I had bleeding
problems with) and it squirted fluid out.
|
As seen from the picture it looks like someone mishandled the nut,
apparently in a desperate attempt to seal it. If it wasn't you who did
it just after the recent leak, it looks like it has caused troubles
before. Although I hate the Jamar junk it doesn't look like it has
anything to do with it this time. You just need to replace the brass nut
and seal.
Ian just pointed out that the black tube is of the wrong size. Well, I
only have the black one but it never gave problems. In your case I
wouldn't worry about the one black tube from the central connection, it
is indeed connected to the reservoir and never carries any pressure at all.
| Quote: | The next trouble is that I need to get to the parking brake valve to put
a new handle on it
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From your description I think that your parking brake is broken and
needs to be replaced completely.
| Quote: | but I have
no idea how to get to it! Its inside the central tunnel, seemingly
inaccessible.
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The belly directly under the tunnel was originally intended to be cut
away for the monowheel, it is just a thin skin and carries no structural
purpose at all. Many trigear owners (like me) have cut it (partly) away
nevertheless and created a hatch in place of it. You can still do that
and you will find there is so much working space there that you can even
stick your head in it. Replacing the parking brake will be very easy
that way. Also it offers easy inspection of fuel lines, rudder cables
and other things. If there is no hatch there, I wonder how one would
carry out the annual inspection.
Succes,
Frans
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