Yep,
With the brakes pulled on very hard (about 450PSI), the heat expands the fl
uid (the outer shop is very hot in summer) and the brake pressure south of
the park brake got higher with the heat and soon the spring release on the
valve, can=92t release against the pressure. I use Mil 5606 in 12AY, and t
hat is a sticky fluid which probably didn=92t help either.
By the way, the master and slave cylinders can stick also. If your brake c
aliper slides are a bit on the loose side, then you can cock the brake cali
per and it just won=92t release unless the plane is moved. Also the calipe
r piston is prone to cocking causing a dragging brake.
I=92m thinking of going to a wagon wheel wood to tire park brake setup with
a long handle and cable. It=92s 50 pounds, so I=92m thinking of making it
lighter and smaller. Perhaps a set of custom chocks made from small alumi
num angle may be a smarter idea.
Best Regards,
Bud Yerly
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s 10
________________________________
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> on behalf of William Daniell <wdaniell.longport@gmail.com>
Sent: Friday, July 12, 2019 7:50:11 PM
Subject: Re: Europa-List: brake locked
Yes....was it very hot?
It happened to me one hot day...I left the aircraft out in the sun with the
parking brake on and and it bound on - apparently the older PA28s do it.
I cant remember the explanation though. If it happens take the brakes off
and put it in the shade. it will loosen after a while
William Daniell
LONGPORT
On Fri, Jul 12, 2019 at 5:42 PM diamond <emanu@gmx.fr<mailto:emanu@gmx.fr>>
wrote:
.fr>>
Hello,
I own an xs tri with finger brakes
After having activated the parking brake, my left brake was stuck. I had to
loosen the bleed screw to free the disc.
Any ideas?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=490226#490226
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