[TR] Brake fluid for Triumph

Dave Connitt dconnitt at fuse.net
Fri Nov 30 08:38:19 MST 2018


Yea,

Kind of like us…..

Dave Connitt

 

From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of ptegler at verizon.net
Sent: Thursday, November 29, 2018 1:37 PM
To: terryrs at comcast.net; TR3driver at ca.rr.com; triumphstag at gmail.com
Cc: triumphs at autox.team.net
Subject: Re: [TR] Brake fluid for Triumph

 

..the only negative I've ever encountered with Dot 5 in our old cars is it does not lubricate the rubber as well as older fluids.
Synth and natural rubber also react differently ...as with everything with LBC's...   ymmv

ptegler


-----Original Message-----
From: TERRY SMITH <terryrs at comcast.net <mailto:terryrs at comcast.net> >
To: Randall <TR3driver at ca.rr.com <mailto:TR3driver at ca.rr.com> >; Sujit Roy <triumphstag at gmail.com <mailto:triumphstag at gmail.com> >
Cc: Triumphs <triumphs at autox.team.net <mailto:triumphs at autox.team.net> >
Sent: Thu, Nov 29, 2018 11:07 am
Subject: Re: [TR] Brake fluid for Triumph

When restoring my 3A in 2002, while the body was off the frame I replaced all the brake lines and hydraulic cylinders.  I learned about Dot 5 silicone based fluid from the List then and went with it. After 15 years of driving, the same brake system remains rock solid plus I never blistered paint with the occasional spill.  Doesn't silicone wear easier on rubber seals?

Terry Smith, '59 TR3A  TS 58667
New Hampshire, where early snows have sent both bears and Triumphs off to the Land of Nod 


> On November 28, 2018 at 7:58 PM Randall <TR3driver at ca.rr.com <mailto:TR3driver at ca.rr.com> > wrote:
> 
> 
> 
> > Can I use DOT 5 in the Stag? Do I need to flush out the 
> > current DOT 3/ 4?
> 
> Both of my Stags have DOT 5 in them.  LE1473 was converted just by bleeding
> through at each corner until clean purple fluid appeared.  The other one
> (dubbed Frankenstag because it appears to be parts from at least 3 different
> cars) had a failed MC and stuck rear wheel cylinders when I got it, so those
> were repaired at the same time.
> 
> However, LE1473 already had what seemed to be a minor master cylinder
> problem before the conversion (pedal would sometimes drop towards floor
> while sitting at a stop light), and it suddenly got a whole lot worse not
> long after the conversion (no hydraulic brakes at all).  (I also learned
> that the back brakes on a Stag are more prone to fade than a TR3.)
> Post-mortem showed both MC piston seals torn, and approximately the
> consistency of Gummi Bears.
> 
> So I'd have to say that "best practice" is probably to replace the seals at
> the same time.
> 
> Randall
> 
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