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Re: [TR] TR6 brake master cylinder

To: 'Randall' <tr3driver@ca.rr.com>, Dave Connitt <dconnitt@fuse.net>
Subject: Re: [TR] TR6 brake master cylinder
From: Cliff Hansen <cliff_hansen@outlook.com>
Date: Wed, 30 Mar 2016 03:06:14 +0000
Cc: triumphs@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <BLUPR19MB0148A1B16CD0DB3C8EAB4904EC860@BLUPR19MB0148.namprd19.prod.outlook.com> <B1.E3.15066.37F89F65@cdptpa-oedge03> <002001d18a06$fa516450$eef42cf0$@fuse.net> FILETIME=[1F434D30:01D18A31]
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I had to change all the hoses - they all leaked after I switched to DOT5. I=
'd already rebuilt the calipers and cylinders and had new brake lines  I su=
ppose I shouldn't had reused the hoses.
Cliff

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On Tue=2C Mar 29=2C 2016 at 7:29 PM -0700=2C "Dave Connitt" <dconnitt@fuse.=
net> wrote:





Randall=2C
Interesting. I have been running DOT3 in my TR4A since I got the car
drivable (about 2 years now) and only used DOT3 because there was a big
sticker on the side of the master cylinder telling me "USE ONLY DOT 3 BRAKE
FLUID OR WARRENTY IS VOID". I was wondering how big a PIA it would be to
flush out the DOT3 fluid and replace it with DOT5. I have read many posts o=
n
this list where people have used DOT 5 with no issues so I am considering
changing over as I should probably replace the current fluid after 2 years
anyway.
Dave Connitt

-----Original Message-----
From: Triumphs [mailto:triumphs-bounces@autox.team.net] On Behalf Of Randal=
l
Sent: Monday=2C March 28=2C 2016 4:09 PM
Cc: triumphs@autox.team.net
Subject: Re: [TR] TR6 brake master cylinder


> That was going to be my next question. About how carefully one had to
> drain the dot 4 when installing dot 5. It sounds like I can put in my
> fresh MC=2C fill it with silicone=2C then bleed each brake till I see
> purple fluid.

Another contested question.  My experience is as Paul said=2C just "bleedin=
g
through" will not remove all of the old brake fluid from the system.
However=2C I saw no ill effects from the small pockets of old fluid left ov=
er.
The DOT 5 will not mix with the old fluid=2C and is slightly less dense=2C =
so
you get little pockets of fluid in corners that don't get used (like the
base of the rear slave cylinders).  The DOT 5 also surrounds it=2C so it ca=
n't
promote corrosion (and I assume not absorb water or salt).

Main disadvantage seems to be that the remaining DOT 3/4 will suck all the
purple dye out of the DOT 5.

Randall


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<div>I had to change all the hoses - they all leaked after I switched to DO=
T5. I'd already rebuilt the calipers and cylinders and had new brake lines =
&nbsp=3BI suppose I shouldn't had reused the hoses.</div>
<div><br>
</div>
<div>Cliff<br>
<br>
<div class=3D"acompli_signature">Get <a href=3D"https://aka.ms/o0ukef";>Outl=
ook for iOS</a></div>
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<br>
<div class=3D"gmail_quote">On Tue=2C Mar 29=2C 2016 at 7:29 PM -0700=2C &qu=
ot=3BDave Connitt&quot=3B <span dir=3D"ltr">
&lt=3B<a href=3D"mailto:dconnitt@fuse.net"; target=3D"_blank">dconnitt@fuse.=
net</a>&gt=3B</span> wrote:<br>
<br>
</div>
<div class=3D"BodyFragment">
<div class=3D"PlainText">Randall=2C<br>
Interesting. I have been running DOT3 in my TR4A since I got the car<br>
drivable (about 2 years now) and only used DOT3 because there was a big<br>
sticker on the side of the master cylinder telling me &quot=3BUSE ONLY DOT =
3 BRAKE<br>
FLUID OR WARRENTY IS VOID&quot=3B. I was wondering how big a PIA it would b=
e to<br>
flush out the DOT3 fluid and replace it with DOT5. I have read many posts o=
n<br>
this list where people have used DOT 5 with no issues so I am considering<b=
r>
changing over as I should probably replace the current fluid after 2 years<=
br>
anyway.<br>
Dave Connitt<br>
<br>
-----Original Message-----<br>
From: Triumphs [<a href=3D"mailto:triumphs-bounces@autox.team.net";>mailto:t=
riumphs-bounces@autox.team.net</a>] On Behalf Of Randall<br>
Sent: Monday=2C March 28=2C 2016 4:09 PM<br>
Cc: triumphs@autox.team.net<br>
Subject: Re: [TR] TR6 brake master cylinder<br>
<br>
<br>
&gt=3B That was going to be my next question. About how carefully one had t=
o <br>
&gt=3B drain the dot 4 when installing dot 5. It sounds like I can put in m=
y <br>
&gt=3B fresh MC=2C fill it with silicone=2C then bleed each brake till I se=
e <br>
&gt=3B purple fluid.<br>
<br>
Another contested question.&nbsp=3B My experience is as Paul said=2C just &=
quot=3Bbleeding<br>
through&quot=3B will not remove all of the old brake fluid from the system.=
<br>
However=2C I saw no ill effects from the small pockets of old fluid left ov=
er.<br>
The DOT 5 will not mix with the old fluid=2C and is slightly less dense=2C =
so<br>
you get little pockets of fluid in corners that don't get used (like the<br=
>
base of the rear slave cylinders).&nbsp=3B The DOT 5 also surrounds it=2C s=
o it can't<br>
promote corrosion (and I assume not absorb water or salt).<br>
<br>
Main disadvantage seems to be that the remaining DOT 3/4 will suck all the<=
br>
purple dye out of the DOT 5.<br>
<br>
Randall<br>
<br>
<br>
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