[TR] Brake Fluid for TR3A

Thu Oct 5 11:08:01 MDT 2017

Does anybody know if you can run Dot 5 with the HVDA tranny conversion? The
HVDA conversion uses a hydraulic throw-out bearing. I forgot to ask Herman
last time I saw him.

Thx, Johnnie
'67 TR4A using Dot 4

On Sun, Sep 10, 2017 at 10:26 AM, David Porter <frogeye at porterscustom.com>
wrote:

> FWIW, I've switched to 5.1 which is a synthetic 3/4. It is less
> hydrophilic than 3/4 and has a higher boiling point. Still eats paint
> though.. DaveP
>
> On 9/10/2017 9:49 AM, david brady wrote:
>
> I'm switching over to DOT5. I removed all my hydraulics and sent them off
> to White Post in Va for rebuilding. Fifteen years ago WP over-size bored
> and pressed brass inserts into all my hydraulics. I'm afraid I've neglected
> the system in the meantime. My clutch master cylinder started leaking and
> it bubbled up the surrounding paint. The DOT4 fluid turned gelatinous and
> developed a precipitate. WP is probably assembling the cylinders using DOT4
> but I don't care. When I receive the items they're going back in with DOT5.
> I'll let you know how it turns out.
>
>
> David Brady, TR250, CD8124L <done with dot3/4>
>
>
> On 09/10/2017 09:25 AM, Paul Tegler wrote:
>
> Just like many of the replacement cyl boxes state.... warranty voided if
> you use silicone fluid (Dot 5)
>
> What it boils down to is 5 does not lubricate the rubber seals the way 3/4
> does. It's also a crap shoot
>
> as it effects synthetic vs natural rubber seals differently
>
> I too have been running 5 in all my LBC's for years. Yes, I've replaced a
> master or two, but no more than when I was running 3
> Paul Tegler ptegler at verizon.net www.teglerizer.com
> On 9/9/2017 7:12 PM, dave wrote:
>
> I think that’s a good idea, but I don’t really think its true
>
>
>
> *From:* Triumphs [mailto:triumphs-bounces at autox.team.net
> <triumphs-bounces at autox.team.net>] *On Behalf Of *Cliff Hansen
> *Sent:* Saturday, September 9, 2017 12:04 PM
> *To:* David Friedlander <forzion7 at gmail.com> <forzion7 at gmail.com>;
> Randall <TR3driver at ca.rr.com> <TR3driver at ca.rr.com>
> *Cc:* TR3 Triumphs <triumphs at autox.team.net> <triumphs at autox.team.net>;
> Ann Carletta <anncarletta at yahoo.com> <anncarletta at yahoo.com>
> *Subject:* Re: [TR] Brake Fluid for TR3A
>
>
>
> You can’t switch from DOT3/4 to DOT 5 without replacing _*all*_ of the
> non-metal parts: caliper seals, hoses, master cylinder seals, and
> thoroughly cleaning the metal parts.  I’m guessing that they used DOT3
> brake fluid as a lubricant when they assembled the master cylinder.
>
>
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>
> *From: *David Friedlander <forzion7 at gmail.com>
> *Sent: *Saturday, September 9, 2017 9:13 AM
> *To: *Randall <TR3driver at ca.rr.com>
> *Cc: *TR3 Triumphs <triumphs at autox.team.net>; Ann Carletta
> <anncarletta at yahoo.com>
> *Subject: *Re: [TR] Brake Fluid for TR3A
>
>
>
> Randall;
>
>
>
> I am installing new brake master cylinders in my TR3 and the boxes
>
> theycame in had the label you can see in the attached photo.
>
> What do you make of this?
>
>
>
> I run DOT5 in my TR6 without issue but am rebuilding this
>
> TR3 and wanted to use DOT5 here as well...
>
>
>
> Thanks,
>
>
>
> Dave Friedlander
>
> Maine
>
>
>
>
>
> On Sat, Sep 9, 2017 at 2:35 AM, Randall <TR3driver at ca.rr.com> wrote:
>
> There is no clear consensus on brake fluid.  Some of us love DOT 5
> silicone,
> others hate it.
>
> But I do recommend that you find out what you have before topping up; and
> also look for where it is leaking.  Since this is a single circuit braking
> system, it only takes one leak to rob you of all hydraulic brakes.  Not a
> good feeling, especially when you're going downhill into an underground
> parking garage, and the handbrake is also broken!
>
> Also, if you don't have DOT 5, any other brake fluid will eat paint
> promptly
> and promote rust.  And any of them will ruin the rear brake shoes if it
> gets
> on them.
>
> If you do use one of the non-silicone formulas, you also shouldn't keep an
> old can of it.  They suck moisture directly from the air, once the can has
> been opened, and start getting old.  That's why you should always open a
> new
> can; and change it in your braking system every few years, even if you
> don't
> drive the car.  (Just one of the many reasons I like DOT 5, it doesn't suck
> <g>)
>
> Here is a good article (IMO) on the pros & cons of DOT 5
> http://www.buckeyetriumphs.org/technical/Brakes/Fluid/Fluid.htm
> If you are a glutton for punishment, you can also find the SAE papers that
> it references here
> https://drive.google.com/open?id=0B2H2NJt34OffdnhWS19scjlNUU0
>
> Of all the TR3s I've driven and owned, only my current "barn find" 56
> needed
> lead (substitute).  I eventually changed the head, and now I don't use
> lead.
> My previous TR3A engine went well over 100,000 miles without ever having
> lead added.
>
> -- Randall
>
>
>
>
>
>
> ** triumphs at autox.team.net **
>
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>
> --
> Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM 87107
> 505-352-1378 <(505)%20352-1378> Go HERE: my world www.porterbikes.com/
>
>
> ** triumphs at autox.team.net **
>
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>
>
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