[TR] Brake Fluid for TR3A

Thu Oct 5 20:29:31 MDT 2017

The instructions with the throw out bearing say not to use dot 5 fluid

Rod Trunnell
TR3B

On Oct 5, 2017 7:24 PM, "Johnnie Donnelly" <johnniedonnelly at gmail.com>
wrote:

> 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 **
>>
>> Donate: http://www.team.net/donate.html
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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 **
>>
>> Donate: http://www.team.net/donate.html
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>> options/triumphs/johnniedonnelly at gmail.com
>>
>>
>
>
> ** triumphs at autox.team.net **
>
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