*Carl*
*Not wishing to be a party pooper don=92t use Dot 5.1 Brake fluid in your
system,*
*Dot 5.1 is a glycol base brake fluid and is not suitable for the seals in
the Brake valve*
*And callipers, I have had two Jaymar cylinders and both were a problem
even after*
*A complete strip/clean and seal replacement,*
*Last year I through them out and fitted the twin matco cylinders using
normal aviation*
*Hydraulic oil or ATF, also replaced the calliper and brake valve with the
Buna seals and had no problems since, *
*The only fluid combatable with both types of seals is *
*Silicone Dot 5*
* *
*If you check the archive there is a great deals of information about this
very subject, I personally do not like the silicone fluid So changed all my
seals to EPDM and used DOT 5.1 Glycol based fluid, That was Until the
Jaymars Gave up the ghost, So replace all my seals with Buna/N and fitted
the Matco Master cylinders using Standard Aviation hydraulic oil, It all
works fine now*
* *
* *
* *
* *
*DOT MINIMUM BOILING POINT SPECIFICATIONS *
*Fluid Type:*
*Glycol-based Fluids*
*Silicone Fluid*
*DOT3*
*DOT4*
*DOT5.1*
*DOT5*
*Minimum Dry Boiling Point1*
*205 =B0C/401 =B0F *
*230=B0C/ 446 =B0F*
*~270 =B0C/518 =B0F*
*230 =B0C/500 =B0F*
*Minimum Wet Boiling Point2*
*140 =B0C /284 =B0F *
*155=B0C /311 =B0F *
*~190 =B0C/375 =B0F*
*180 =B0C /356 =B0F3*
1 Dry fluid is with no water content as from a freshly opened container.
2 Wet fluids is with 3.5% water content typical of glycol-based fluids
after 24 months use.
3 The wet boiling point for the DOT 5 fluid is the DOT specification. The
silicone fluid absorbs a very small amount of water (<0.3%) so the boiling
point doesn't change with use and one can expect the boiling point to
remain at ~ 230 =B0C/500 =B0F for many years.
* *
*Regards*
* *
*Ivor Phillips*
*G-IVER*
On 11 November 2011 15:57, Carl Meek <carlmeek@gmail.com> wrote:
> Thanks for the advice, I've just come from the airfield having done a
> bit more investigation.
>
> Attached is a picture of my master cylinder, apparently it's a "New Jamar
> finger brake controller all filled with DOT5.1 fluid filled from the whee
ls
> 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 an
d
> there are A LOT of very large bubbles in the left hand tube leading out o
f
> the master cylinder.
>
> I have just bought a bleeding kit and some 5.1 and will try to sort it ou
t
> tomorrow, I'm just worried there is a leak or something ' as it was fin
e
> 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>
> Reply-To: <europa-list@matronics.com>
> Date: Thu, 10 Nov 2011 23:16:54 -0500 (EST)
> To: <europa-list@matronics.com>
> Subject: Re: Europa-List: Europa Finger Brakes
>
> Describe the type of master cylinder you have as well as the type wheel
> cylinders. There have been a few master cylinders of inferior quality
> experienced by several builders.
>
> Mike Duane
>
>
> -----Original Message-----
> From: Carl Meek <carlmeek@gmail.com>
> To: europa-list <europa-list@matronics.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 wit
h
> a bit of pumping first.
>
> Essentially I'm saying that they appear to be substandard, need pumping t
o
> 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
> couldn't find anything wrong - he checked they were bled and suchlike, he
> then reported 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
> blank>http://www.matronics.com/contribution
> arget=_blank>http://www.matronics.com/Navigator?Europa-List
> p://forums.matronics.com
> blank>http://www.matronics.com/contribution
> *
>
> *
> ic.comw.buildersbooks.comthelp.comronics.com/contribution
> //www.matronics.com/Navigator?Europa-List
> comronics.com/contribution
> *
>
>
|