Hi,
If you have the Jamar master cylinder, this is what you have to do......
Lay out some clean paper on your bench, remove the Jamar unit from the plan
e and disassemble the unit, keep all the seals / springs / pushrods etc in
the correct order, laid out on the clean paper.
Take a close look at the quality of all the parts.... this is about as poor
as anything could ever be made ! Wrap all the parts up in the paper and lo
b it in the bin !
You could invest a lot of time in cleaning the buffing soap [ that was used
to put the BS shine on the outside ] from the inside, and polish the machi
ning marks from the bores, clean the soap from the tranverse bore between t
he two cylinders, ease the diameter and radius the edge of the nylon washer
s and try to make something out of it, but from experience you can spend a
lot of time that rarely gives you something you would want to put in an Air
craft.
Two options.
1. Fit Matco cylinders, top quality, very expensive but will work. Can stil
l be a bear to bleed, but you can use the red [ cherryade] brake fluid that
every Aircraft Maintenence Facility has ....
2.Use two of the Kart master cylinders as fitted to the Mono Europa and ori
ginal Trigear [ foot brakes ], you will need to make longer levers [ to get
mechanical advantage] BUT there are two kinds of seals / O rings around, o
ne sort is suitable for Dot 3,[ as supplied for the Mono] which works with
the Europa caliper, the other is for the cherryade that works with the Matc
o caliper. Trouble is you can't tell the difference by looking at them, if
used in the wrong fluid, they expand / go squishy.
Europa have a stock of these that they don't know which type they are, so n
o help there.
You CAN use Silicone Dot 5 with both the master cylinders and the Calipers,
but it is damn awful stuff, very thick [ so is a bitch to bleed] and if yo
u get any on paintwork [ or God forbid unpainted structure] you will never
get anything to really get it off. Only one good place for Silicone, that i
s where Dolly Parton / Pamela Anderson has it !
Bleeding the set up with the Kart cylinders is a breeze, big [Large Vet's
syringe] bit of model fuel tube stuffed over the bleed nipple, bung out of
the Master cylinder, crack open the nipple, squirt the fuid in, have someon
e peek at the bung hole, when it comes to the top, job done 5 minutes a sid
e Max. Down side ? As the pads wear you need to top up the fluid, but simpl
e as you just need to dribble it in the bung hole to the bottom of the thre
ads.
You might be able to use the Jamar unit as the lever / baseplate and graft
the Kart cylinders on to that ? I will have a look tomorrow on the feasabil
ity of that.That would save a lot of mucking about.
Cheers,
Nev
-----Original Message-----
From: Carl Meek <carlmeek@gmail.com>
Sent: Fri, 11 Nov 2011 16:02
Subject: Re: Europa-List: Europa Finger Brakes
Thanks for the advice, I've just come from the airfield having done a bit m
ore investigation.
Attached is a picture of my master cylinder, apparently it's a "New Jamar f
inger brake controller all filled with DOT5.1 fluid filled from the wheels
as per the build book"
Apparently I have "Matco 5 inch discs on the wheels with new seals fitted."
I just popped the cover off the levers to look at the master cylinders and
there are A LOT of very large bubbles in the left hand tube leading out of
the master cylinder.
I have just bought a bleeding kit and some 5.1 and will try to sort it out
tomorrow, I'm just worried there is a leak or something =93 as it was
fine last week but absolutely terrible now..
Do you think a simple bleed from the LH calliper will do the job?
Regards,
-Carl.
From: <duanefamly@aol.com>
Date: Thu, 10 Nov 2011 23:16:54 -0500 (EST)
Subject: Re: Europa-List: Europa Finger Brakes
Describe the type of master cylinder you have as well as the type wheel cyl
inders. There have been a few master cylinders of inferior quality experien
ced by several builders.
Mike Duane
-----Original Message-----
From: Carl Meek <carlmeek@gmail.com>
Sent: Thu, Nov 10, 2011 12:43 pm
Subject: Europa-List: Europa Finger Brakes
Can I just get a bit of advice from anyone with finger brakes fitted?
Mine seem to be a bit odd. Firstly, if i just pull a single one of them it
will hit the stop, whereas if i pull them both they have more feel and don
't hit the stop quite so much, however they seem to respond better with a b
it of pumping first.
Essentially I'm saying that they appear to be substandard, need pumping to
work properly, and even then pulling just one doesn't seem to work well.
Any thoughts on what could be wrong? An engineer investigated it but could
n't find anything wrong - he checked they were bled and suchlike, he then r
eported it was caused by the fact the master cylinders were not big enough
for the callipers so they need pumping.
_blank>www.aeroelectric.com
" target=_blank>www.buildersbooks.com
_blank>www.homebuilthelp.com
lank>http://www.matronics.com/contribution
rget=_blank>http://www.matronics.com/Navigator?Europa-List
://forums.matronics.com
lank>http://www.matronics.com/contribution
ic.com
.buildersbooks.com
help.com
onics.com/contribution
/www.matronics.com/Navigator?Europa-List
om
onics.com/contribution
|