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Re: [ST] Tech Info
- Subject: Re: [ST] Tech Info
- From: Colt45 <colt4530@xxxxxxxxxxx>
- Date: Fri, 01 Oct 2004 00:27:29 -0400
You don't have to buy it. I saw it. All that was done was to change
the fluid. Changing it back (with a little extra flushing) restored
normal operation.
Swelling seals and high altitude off-gassing are all I've ever heard as
problems with Silicone, DOT 5, brake fluid. I've used it and find it's
only advantage is lack of paint damage.
Neil Lindsey wrote:
>sorry, I'm not buying
>
>sounds more like a botched brake job
>
>Neil
>
>
>----- Original Message -----
>From: "Colt45" <colt4530@xxxxxxxxxxx>
>To: <ST@xxxxxxxxxxxxxx>
>Sent: September 30, 2004 7:44 PM
>Subject: Re: [ST] Tech Info
>
>
>
>
>>I saw DOT 5 swell the caliper piston seals in a Yamaha RD350 to the
>>point the brakes locked on the first application after it had been in
>>the system for minutes. The caliper seals are the rubber that is likely
>>attacked.
>>
>>Neil Lindsey wrote:
>>
>>
>>
>>>OEM Sprint brakelines ARE stainless-steel braided lines. They are just covered in
>>>
>>>
>rubber
>
>
>>>so you can't see the braiding.
>>>
>>>DOT5 brake fluid is silicone-based and DOT5 was originally designed for military
>>>
>>>
>vehicles
>
>
>>>which are often left unattended for long periods of time. It doesn't attack rubber.
>>>
>>>
>DOT5
>
>
>>>fluid is also not hydroscopic (it does not absorb water and will not mix with water).
>>>It's only major advantage is that it doesn't attack paint, unlike poly-glycol fluids.
>>>DOT5 brake fluid also has higher dry and wet boiling points, which means that it is
>>>
>>>
>better
>
>
>>>suited for extreme temperature situations. However, since it does not absorb water,
>>>
>>>
>any
>
>
>>>water (which is heavier than brake fluid) that inevitably gets into the system will
>>>
>>>
>pool
>
>
>>>at the lowest points (usually the calipers) and when that water boils it will affect
>>>braking iin the same way that moisture in hydroscopic brake fluid does. It will, over
>>>time, also cause corrosion of caliper pistons. Also, as it approaches its boiling
>>>
>>>
>point,
>
>
>>>DOT5 fluid will become slightly compressible -- hence a spongy brake feel. Lastly,
>>>silicone and poly-glycol fluids are incompatible and should therefore never be mixed.
>>>
>>>
>So
>
>
>>>if you really want to switch to DOT5, you'll need to disassemble and thoroughly clean
>>>
>>>
>the
>
>
>>>ENTIRE system.
>>>
>>>So the recommendation against using DOT5 is correct, but not for the reason given.
>>>
>>>Neil
>>>
>>>
>>>
>>>
>>>
>>--
>>John Albright
>>'02 RS
>>'00 748 "Rosetta"
>>Chattanooga
>>C-RATs
>>
>>
>> * * * * * * * * * * * * * * * * * * *
>> The ST/RS Mailing list is sponsored by Jack Lilley Ltd.
>> http://www.TriumphNet.com/st/lilley for more info
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>>
>>
>>
>
>
> * * * * * * * * * * * * * * * * * * *
> The ST/RS Mailing list is sponsored by Jack Lilley Ltd.
> http://www.TriumphNet.com/st/lilley for more info
> http://www.TriumphNet.com/st for ST, RS and Mailing List info
>
>
>
>
- --
John Albright
'02 RS
'00 748 "Rosetta"
Chattanooga
C-RATs
* * * * * * * * * * * * * * * * * * *
The ST/RS Mailing list is sponsored by Jack Lilley Ltd.
http://www.TriumphNet.com/st/lilley for more info
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