Today's Message Index:
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1. 12:23 AM - Re: Brake components and seals (aerosiam)
2. 07:39 AM - Re: Brake components and seals (Roger Lee)
3. 07:42 AM - Re: Brake components and seals (Roger Lee)
4. 09:50 AM - Re: Re: Brake components and seals (Brian)
5. 04:55 PM - Re: Brake components and seals (Roger Lee)
6. 05:26 PM - Re: Re: Brake components and seals (Brad Kramer)
7. 06:15 PM - Re: Brake components and seals (Roger Lee)
8. 10:00 PM - Re: Brake components and seals (aerosiam)
Message 1
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| Subject: | Re: Brake components and seals |
Hugh
I replaced all the seals possible. I think the plunger seal in the master cylinder
is important as Brian suggests.
I had to pump the brake 3 times before startup to ensure I have sufficient pressure
which suggests the fluid is slipping past the plunger seal. Then it would
hold the 100 hp engine at 4,000 rpm for the mag check.
I agree with Brian that bottom up simultaneously works better.
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318104#318104
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| Subject: | Re: Brake components and seals |
Hi Guys,
You should absolutely fill your system from the bottom up to float out the air
in the system. You can use that little oil can and I did many years ago, but found
a much better mousetrap so to speak for about $10. The oil can works, but
is slow and doesn't always get the job done well. Here is an Ace Hardware one
gallon bug sprayer. Just unscrew the tip and replace it with some clear tubing.
Pour in the brake fluid which should be the 5600 aircraft brake fluid and never
auto DOT fluid. Then pump up the sprayer with pressure with the little knob
on top. Slightly squeeze the trigger and bleed any air out of the sprayer tubing.
Attach it to the bottom break bleed valve on the bottom of the caliper,
open the bleeder valve some and press the trigger. The system flushes so easily
and fast that it sweeps all the air with it. I take a little water bottle with
a piece of tubing taped in it and place it up at the reservoir and as the
fluid flushes up and out with the air the bottle catches the overflow. I do both
sides then get in and pump the brake handle or toe brakes about 10-15 times
fast and fairly hard to move any trapped bubbles around. Then a quick second
flush. Works perfect every time and never a any air left in the system. The fluid
waste is only about 2-3 oz. The auto DOT fluid will eat your "O" rings and
cause leaks in the tubing of your brake system. If you are having any issues
with the brakes and seals and use the DOT fluids now you know why. This is one
of my best tools in my shop for $10 and it takes no time and no hassle to bleed
a brake system.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318121#318121
Attachments:
http://forums.matronics.com//files/brake_flush_002_893.jpg
http://forums.matronics.com//files/brake_flush_001_208.jpg
Message 3
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| Subject: | Re: Brake components and seals |
P.S.
If you want to keep corrosion of your planes metal parts Boeing T-9 works very
well. It was made for the Boeing aircraft company and will seal out all moisture.
Do no spray it on thing like brake disc or pads. It works and can be used
on an engine or any metal part or metal type (aluminum or steel)
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318122#318122
Message 4
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| Subject: | Re: Brake components and seals |
Roger,
The Allegro calls for Dot 3,4 Brake fluid!!!!
brian
Sent from Brian's iPod
On Nov 4, 2010, at 7:40, "Roger Lee" <ssadiver1@yahoo.com> wrote:
P.S.
If you want to keep corrosion of your planes metal parts Boeing T-9 works very
well. It was made for the Boeing aircraft company and will seal out all moisture.
Do no spray it on thing like brake disc or pads. It works and can be used
on an engine or any metal part or metal type (aluminum or steel)
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318122#318122
Message 5
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| Subject: | Re: Brake components and seals |
Hi Brian,
DOT fluid might be suggested, but if all the components in the system don't then
you will have all these type issues you guys are talking about. I have seen
DOT brake fluid eat many "O"rings and seals. I was a victim many years ago because
someone said it was ok. Just something to consider.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318192#318192
Message 6
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| Subject: | Re: Brake components and seals |
Hi Roger,
Just so I'm clear on this, do you suggest we ignore the Allegro maintenance
manual that specifically calls for DOT 3/4?
Thanks for your insight and experience!
...Brad...
N221FA / Bismarck ND
-----Original Message-----
From: owner-allegro-list-server@matronics.com
[mailto:owner-allegro-list-server@matronics.com] On Behalf Of Roger Lee
Sent: Thursday, November 04, 2010 6:53 PM
Subject: Allegro-List: Re: Brake components and seals
Hi Brian,
DOT fluid might be suggested, but if all the components in the system don't
then you will have all these type issues you guys are talking about. I have
seen DOT brake fluid eat many "O"rings and seals. I was a victim many years
ago because someone said it was ok. Just something to consider.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Message 7
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| Subject: | Re: Brake components and seals |
What I'm saying is you ought to be very suspicious of DOT fluids in your brake
system and if people continue to have issues then I would change and file for
an LOA for the 5600. I have filed many LOA's not only for individuals, but fleet
approvals for the Flight Design CT. I have changed the entire brake system
from the Marc Ingegno brakes to Matco's just for an example. The factory is not
always right and can and does use help from people in the field. Yes you should
get an LOA for the 5600 fluid change. So long as you have a good reason and
can back up any LOA change Mfg's will usually try to accommodate people.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318200#318200
Message 8
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| Subject: | Re: Brake components and seals |
What about DOT 5 silicon brake fluid (not 5.1) ?
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318215#318215
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