[TR] Fwd: Caliper Piston Removal

[Brian Jones]

We digress, but among this list's perpetual discussions, the Ying and Yang
of Triumph lore, are Push Vs Puller fans, drivetrain lubrication, and brake
fluif.

I thought the non-issue about DOT 5 was about it having a slightly lower
boiling point than DOT 3 or 4, rather than a reduced hydraulic capability.
This may be a concern for real TR racers. On the upside, it neither absorbs
water nor reverts paint to a fluid form. I think the bubble issue is
overstated. Marvel at its pretty purple colour, pour carefully, and you'll
not have a problem.

Brian


On Wed, Nov 11, 2009 at 4:06 PM, Rick <chandler.rick at comcast.net> wrote:

> Subject: Re: [TR] Caliper Piston Removal
>
>
>
> I've used compressed air to loosen a half-dozen caliper pistons from some
> very nasty motorcycle and auto calipers, without a failure. Apply lots of
> PT
> Blaster and soak the cylinder wall for a few hours. Place a thin strip of
> wood between the two pistons (one or two wooden paint stirrers work well),
> nearly filling the space. Apply 90 psi of air to the hydraulic port in
> short
> bursts; my mean time to success is a few seconds. Once the pistons are free
> and the cylinders and caliper bodies are cleaned up, insert the rubber
> seals
> and new stainless pistons, then fill the system with de-aerated DOT5 and
> say
> goodbye to corrosion and paint damage. The slight difference in fluid
> compressibility between DOT5 and other fluid grades is overwhelmed by the
> expanding flexible lines; you'll never feel the difference.
>
>
>
>
>
> Rick in Seattle
>
> 1960 TR3A
>
> 1970 BSA 441 Victor Special
>
> 1972 Nordon Commando 750 Combat
>
> 1975 Norton Commando 850 Mk3
> _______________________________________________
>
> Support Team.Net  http://www.team.net/donate.html
>
> This list supported in part by the Vintage Triumph Register
> http://www.vtr.org
>
>
> Triumphs at autox.team.net
> http://autox.team.net/mailman/listinfo/triumphs
>
>
> http://www.team.net/archive