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I wouldn't blame the failure on the fact you are using silicone fluid. I'm not saying it wasn't the cause, but regular Dot 3/4 fluid can cause the same thing. I bought a TR3 that had been sitting for a number of years and sometime during its hibernation, a
seal in the master cylinder failed which resulted in a waterfall of brake fluid and "melted" paint underneath it. At least silicone fluid won't do that! I run silicone fluid in all my Triumphs and have never had a problem. It doesn't overheat unless you're
doing lots of hard braking (that means racing) which doesn't happen with street cars.</div>
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You can probably repair this with a MC repair kit instead of a new MC. But if you decide to order new, I'm not sure Lockheed is available anymore. I believe TRW bought Lockheed and all new MC's have TRW on them. I Have one on my TR6 and it works just fine.</div>
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Good luck, Joel...</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Philip Ethier <pethier7@gmail.com><br>
<b>Sent:</b> Thursday, January 24, 2019 10:14 PM<br>
<b>To:</b> Triumphs<br>
<b>Subject:</b> [TR] Stag master cylinder full of fluid?</font>
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<div dir="ltr"><span style="color:rgb(0,0,0)">My MkII Stag is the USA Stag known as "uncle jack" that was reconditioned in 2009 for John Macartney's charity drive across the USA and Canada.</span>
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<div style="color:rgb(0,0,0)">It has had silicone fluid in it since the rebuild. I put it up for the winter. It had a full brake reservoir. In the spring, the brake reservoir was empty. The engine has not been run. There are no signs of leaks anywhere.
Based on my experience with a Rover 2000TC many years ago, I assume all the fluid is in the brake servo vacuum canister.<br>
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<div style="color:rgb(0,0,0)">Am I correct in assuming that I will get all the parts to repair this by ordering a brake master cylinder? </div>
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<div style="color:rgb(0,0,0)">Ought I order the Lockheed or the TRW version to have a better chance of the seals playing nicely with the DOT 5 Silicone brake fluid? </div>
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<div><span style="color:rgb(0,0,0); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; font-size:12.8px; background-color:rgb(239,239,239)">Phil Ethier West Side Saint Paul Minnesota USA</span><br>
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<div><span style="color:rgb(0,0,0); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; background-color:rgb(239,239,239)">1973 Triumph Stag LE22439UBW "uncle jack", Sapphire Blue</span><br style="color:rgb(0,0,0); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; background-color:rgb(239,239,239)">
<span style="color:rgb(0,0,0); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; background-color:rgb(239,239,239)">2004 Suburban 8.1, Sport Red</span><br style="color:rgb(0,0,0); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; background-color:rgb(239,239,239)">
<span style="color:rgb(0,0,0); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; background-color:rgb(239,239,239)">2005 Lotus Elise, Bordeaux Red Pearl</span></div>
<div><span style="color:rgb(0,0,0); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; background-color:rgb(239,239,239)">2006 Gulf Stream Conquest Super C, 8.1, White</span></div>
<div>2017 Ford Fusion SE 2.0 Turbo, Oxford White<br style="color:rgb(0,0,0); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; background-color:rgb(239,239,239)">
<a href="http://www.mnautox.com/" target="_blank" style="color:rgb(0,24,57); font-family:verdana,geneva,lucida,"lucida grande",arial,helvetica,sans-serif; background-color:rgb(239,239,239)">http://www.mnautox.com</a><br>
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