[TR] [6pack] Master Cylinder Rebuild

Sun May 17 08:36:44 MDT 2020

Hello,

Not sure what the problems are here. I rebuilt the MC on my 72 6 and I 
am in my 12th season. Now I did use the dot 5 synthetic fluid from TRF.

The MC on my 58 3 had the seals replaced about 10 years ago and not a 
problem since.

Same with the 63 4. Rebuild MC and clutch MC and used the same dot 5 
from TRF. No problems for over 15 seasons.

Before I rebuilt the 3 MC, I did notice it weeping a bit. I have never 
had a total failure in over 50 years of Triumph ownership.

I know this is of little help to understand the failures but I did want 
to let you know what you are experiencing is very unusual in my opinion.

Bob

On 5/17/20 9:44 AM, Robert Rochlin wrote:
> Hi Richard,
> I sent my m/c off to a reputable (I thought ) rebuilder for a complete 
> rebuild and installed it back installed it in the TR6.  As I recall it 
> worked fine for a short time and then on day I was puling out of the 
> garage and the brakes totally failed.  The TR6 rolled int my P/U truck 
> dented the door, and pushed in the front o the Tr6 hood. A very 
> expensive afternoon. I sent the m/c back to the rebuilder as I had 
> time to kill while the body shop fixed the TR6.  They rebuilt the m/c 
> again gratis and I reinstalled it.  After about 8 months the m/c 
> started to fail again, but slowly… I replaced it with a new Girling 
> and it has gone several seasons working fine but now I’m getting the 
> slow sinking pedal. Before replacing it again I am going to replace 
> the seals myself.
>   Although I’ve had good luck with several rebuilt components 
> including starters, carburetors, shocks, and distributers,  I’ll never 
> send a master cylinder to a rebuilder again.
> Best,
> Bob
>
>> On May 17, 2020, at 8:58 AM, Richard Lindsay 
>> <richardolindsay at gmail.com <mailto:richardolindsay at gmail.com>> wrote:
>>
>> Hello Bob, /et al./,
>>
>>    Glad you're well. Here is south Texas we too are relaxing the 
>> stay-at-home order and the older people (like me) are beginning to 
>> venture out, if still maintaining safe separation. The 'younglings' 
>> seem to think an /All Clear/ has been sounded and they're back face 
>> to face. I wish them luck.
>>
>>    I have had two, fresh from the box,  M/Cs fail then a third, 
>> working fine. I don't wish to directly name and disparage the vendor 
>> since they are always quite willing to make things right, but their 
>> name does grow on the 'north side of the tree'. The question I ponder 
>> and why I am writing is to ask is: How did your M/Cs fail?
>>    In one of my unit's failures, fresh from the box, the front brake 
>> circuit worked fine (that's the one closer to the booster) but the 
>> rear brake circuit would flow no fluid. The second unit would flow no 
>> fluid through either circuit! The third M/C worked perfectly and 
>> still works great today!
>>
>>    Did I get two poorly or incorrectly rebuilt cylinders? Someone in 
>> China just make mistakes? Did I do something wrong? Thus I ask: How 
>> did your M/C "fail catastrophically?"
>>
>> -rick
>>
>> On Sun, May 17, 2020, 6:38 AM Robert Rochlin via 6pack 
>> <6pack at autox.team.net <mailto:6pack at autox.team.net>> wrote:
>>
>>     I hope everyone is hanging in there and doing well in this time
>>     of quarantine.  It down’t look like here in Massachusetts the
>>     stay at home order will be  completely lifted for several of more
>>     weeks, but some business slowly are beginning to be be allowed to
>>     reopen.
>>             I’ve had a checkered history with master cylinders. In
>>     the past I’ve sent m/c off to be rebuilt by reputable rebuilders
>>     only to have them catastrophically fail soon after
>>     reinstallation. I’m figuring that I can improve on that record.
>>     When I went to the Buckeye Triumph site to review the rebuild
>>     process the article recommended red grease.  I don’t have any,
>>     but I do have Volvo silicone breaks grease.  In the absence of
>>     red brake grease can I just apply brake fluid as lubricant to do
>>     the rebuild or should i bite the bullet and get the red brake
>>     grease.  About the only red grease I could fine was on Amazon and
>>     it was pretty pricey, $16.00 plus $8.00 shipping.
>>             Any advice would be appreciated.
>>             Best,
>>             Bob
>>             ’72 TR6
>>     _______________________________________________
>>     Support Team.Net <http://Team.Net> http://www.team.net/donate.html
>>     Suggested annual donation  $12.96
>>     Archive: http://www.team.net/archive
>>     Forums: http://www.team.net/forums
>>
>>     6pack at autox.team.net <mailto:6pack at autox.team.net>
>>     http://autox.team.net/mailman/listinfo/6pack
>>
>>     Unsubscribe/Manage:
>>     http://autox.team.net/mailman/options/6pack/richardolindsay@gmail.com
>>
>
>
> ** triumphs at autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive
>
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/yellowtr@adelphia.net
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/triumphs/attachments/20200517/8b79fb2f/attachment.htm>