Frans=2C
Everyone has come up with a different solution. I had identical problems an
d here is what worked for me:
make sure the nipple is at the bottom of the brake=2C not the top.
open it and submerse it in a container containing brake fluid. maybe attach
a short piece of hose first as you did for your syringe. this way no air c
an enter again from the bottom.
now fill the reservoir until it appears full. it is best if someone can hel
p and keep the reservoir topped up .
you now keep operating the brake lever - you will see bubbles of air comin
g out at the bottom. keep operating the lever until no more air comes out.
close the nipple and do same on the other side.
Karl
> Date: Mon=2C 12 Oct 2009 13:01:52 +0200
> From: frans@paardnatuurlijk.nl
> To: europa-list@matronics.com
> Subject: Europa-List: Tri-gear Jamar brakes (breaks?)
>
l>
>
> In the archives I have seen that others have had problems with these
> brakes as well=2C but few wrote what helped them to finally get rid of th
e
> air=2C and/or to fix the unit.
>
> I couldn't bleed my starboard brake by conventional means (from top to
> bottom)=2C but when I finally injected dot5 into the bleed nipple until
> the level in the reservoir raised by 1/2=2C the brake was no longer
> spongy. I couldn't get it to the end-stop anymore. Satisfied with how it
> was=2C I decided not to mess anymore with it and I left it there. For
> injecting the fluid I used an injection thing from the VET (don't know
> the proper name in English) but instead of a needle=2C I attached a
> plastic tube to it. This worked well. Needless to say I used quite a
> large unit.
>
> The port brake however=2C where I applied the same method=2C never got ri
d
> of the air. Even worse=2C if I then try to bleed from top to bottom=2C I
can
> get one throw of the brake lever (with a squirt of fluid going out of
> the bleed nipple) and after that=2C it feels like it is empty (no
> resistance=2C and no significant fluid ejection).
> Since I have been doing this at least 20 times (inject into the bleed
> nipple until the reservoir level rises by half=2C followed by bleeding th
e
> conventional way) I suspect something is wrong here.
> I also winched the airplane halfway up the trailer=2C so it was pointing
> its tail up=2C to easy any air out of the Jamar thing=2C but it didn't
> change anything.
>
> There was one anomaly: while it was pretty easy to inject the fluid on
> the starboard side (the one that worked so well)=2C it was in the
> beginning almost impossible to get some fluid into the port side=2C it
> gave a feeling like it was blocked. As the manual suggest that it should
> be possible to do it this way=2C I increased force until it felt like
> something gave way=2C and after that it was behaving and feeling like the
> starboard side (except that it keeps feeling spongy=2C whatever I try=2C
and
> after one squirt it feels "empty").
>
> Give the massive amounts of fluid I injected=2C and pressure applied=2C I
'm
> sure there are no leaks in the system (otherwise it would have left
> obvious traces of the slippery stuff somewhere in the fuselage).
>
> Actually=2C the brakes have worked for a while last year (although both
> sides were somewhat spongy) when I installed the brakes and filled it up
> with fluid to check its function=2C but never bothered to get it
> completely free of air=2C because I figured that I would have to
> disconnect something again in a later stage. Now I'm preparing for
> "first flight" and tries to get everything in perfect condition=2C I seem
> to be stuck with this...
>
> Any ideas? Should I try harder=2C or might something be wrong with the
> Jamar unit? Do the symptoms indicate a fault?
>
> Frans
>
>
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