<div dir="ltr"><div>I agree, this certainly sounds like a problem with the reservoir shutoff valve not closing properly.</div><div>If it were a problem with the main seals, a lot of fluif would have leaked out.</div><div><br></div><div>I had the same problem develop in my Spitfire brake master cylinder. It turned out that the <br></div><div>"tipping valve" (the shutoff valve for the forward half of the cylinder, was not seating properly.</div><div>It was part of an aftermarket kit I had installed several years ago. I re-installed the original one</div><div>(which I had kept), and the problem went away.</div><div><br></div><div>The lesson: In many cases a new part in an aftermarket rebuild kit can be inferior to a used original</div><div>part.</div><div><br></div><div>Doug</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Oct 12, 2019 at 6:30 PM Robert Nogueirao via Shop-talk <<a href="mailto:shop-talk@autox.team.net">shop-talk@autox.team.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Pat thank, but having inspected the master it appears to be such a poorly made copy of a Girling I see nothing but trouble in the future.the piston does not slide smoothly in the bore leading me to think it is hanging up. Same with the reservoir cut off .<div>Again thanks.<br><div><br><div dir="ltr">Bob Nogueira </div><div dir="ltr"><br><blockquote type="cite">On Oct 11, 2019, at 11:15 PM, Pat Horne <<a href="mailto:patintexas@icloud.com" target="_blank">patintexas@icloud.com</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">You should be able to find a set of seals to try. Lots cheaper than a replacement master. <div><br></div><div>In the past I found this kind of leak by having someone watching the fluid surface in the reservoir while I pressed the pedal down. On my master there was a rise of the fluid where the jet of fluid came out of the reservoir to cylinder hole, causing a “lump” in the fluid surface, indicating a bad seal. </div><div><br></div><div>Peace,</div><div>Pat<br><br><div dir="ltr">Pat Horne <div>We support Habitat for Humanity</div><div><br></div></div><div dir="ltr"><br><blockquote type="cite">On Oct 11, 2019, at 10:46 PM, Robert Nogueirao via Shop-talk <<a href="mailto:shop-talk@autox.team.net" target="_blank">shop-talk@autox.team.net</a>> wrote:<br><br></blockquote></div><div dir="ltr"><span>Okay bleed the lines no solution, chance of air in the lines is remote, the slave is higher than the master, the run between them is only a foot or so and the line turns down for only a couple of inches between them. Additionally <a dir="ltr" style="color:currentcolor;text-decoration-color:rgba(127,127,127,0.38)">the bleeder</a>is at the highest point of the slave. </span><br><span>The lines are new as is the slave and master. </span><br><span>I did disassemble the master to check it out and it appears to be a Girling knockoff. The piston and reservoir shut off valve feel cheaply made. I’m thinking that the reservoir shutoff may be leaking a bit until pressure is built up thus forcing fluid into the reservoir rather than to the slave. Only way to check is order a new Girling master from Pegasus, basically a $125 gamble.</span><br><span>Right now Donald and Pat are in the problem solving playoffs. </span><br><span>Will advise if the gamble pays off</span><br><span>Thanks for the suggestions. </span><br><span></span><br><span>Bob Nogueira </span><br><br><div dir="ltr">B</div><div dir="ltr"><br><blockquote type="cite">On Oct 9, 2019, at 7:18 PM, Donald H Locker via Shop-talk <<a href="mailto:shop-talk@autox.team.net" target="_blank">shop-talk@autox.team.net</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span>It would sound like air to me, too, but that it works "90% of the time" which would indicate to me that one of the seals is not sealing properly.</span><br><span></span><br><span>It's been a while, but I had a similar experience, and discovered that if I hit the pedal quick and hard, the clutch action was good; if not fast or hard enough, the pedal was soft.</span><br><span></span><br><span>My guess is that a seal is old and not always flaring out to the MC bore when the pedal is pressed.</span><br><span></span><br><span>Donald.</span><br><span>--</span><br><span>*Plain Text* email -- it's an accessibility issue</span><br><span>() no proprietary attachments; no html mail</span><br><span>/\ <<a href="http://www.georgedillon.com/web/html_email_is_evil.shtml" target="_blank">http://www.georgedillon.com/web/html_email_is_evil.shtml</a>></span><br><span></span><br><span>On 2019-10-09 8:03 p.m., PJ McGarvey via Shop-talk wrote:</span><br><blockquote type="cite"><span>Sounds indicative of air in the lines, since the first pump is weak/soft, but as you pump it a few more times you get more pressure. Check for loose connections and then bleed a whole bottle of fluid.</span><br></blockquote><blockquote type="cite"><span>PJ</span><br></blockquote><blockquote type="cite"><span>------------------------------------------------------------------------</span><br></blockquote><blockquote type="cite"><span>*From:* Shop-talk <<a href="mailto:shop-talk-bounces@autox.team.net" target="_blank">shop-talk-bounces@autox.team.net</a>> on behalf of Tom Shirley Sr. via Shop-talk <<a href="mailto:shop-talk@autox.team.net" target="_blank">shop-talk@autox.team.net</a>></span><br></blockquote><blockquote type="cite"><span>*Sent:* Wednesday, October 9, 2019 7:46 PM</span><br></blockquote><blockquote type="cite"><span>*Cc:* Shop-talk <<a href="mailto:shop-talk@autox.team.net" target="_blank">shop-talk@autox.team.net</a>></span><br></blockquote><blockquote type="cite"><span>*Subject:* Re: [Shop-talk] Weird clutch petal</span><br></blockquote><blockquote type="cite"><span>Air in the lines?</span><br></blockquote><blockquote type="cite"><span>On Wed, Oct 9, 2019, 6:38 PM Robert Nogueirao via Shop-talk <<a href="mailto:shop-talk@autox.team.net" target="_blank">shop-talk@autox.team.net</a> <mailto:<a href="mailto:shop-talk@autox.team.net" target="_blank">shop-talk@autox.team.net</a>>> wrote:</span><br></blockquote><blockquote type="cite"><span> I have a hydraulic clutch, Girling 5/8” master and a internal slave</span><br></blockquote><blockquote type="cite"><span> that fits over the input shaft. Both are new. Problem is I have a</span><br></blockquote><blockquote type="cite"><span> really good feeling petal, no leaks and good operation 90% of the</span><br></blockquote><blockquote type="cite"><span> time but occasionally when you depress the clutch to change gears</span><br></blockquote><blockquote type="cite"><span> the petal feels soft and will not fully release the clutch. Letting</span><br></blockquote><blockquote type="cite"><span> the petal out and again depressing it and the feel and release are</span><br></blockquote><blockquote type="cite"><span> again normal. Reservoir shows no lost of fluid.</span><br></blockquote><blockquote type="cite"><span> Since the slave is mounted on the input shaft and operates directly</span><br></blockquote><blockquote type="cite"><span> on the throw out bearing there is no linkage to cause the problem.</span><br></blockquote><blockquote type="cite"><span> Any suggestions as to what could be causing this problem?</span><br></blockquote><blockquote type="cite"><span> Bob Nogueira</span><br></blockquote><blockquote type="cite"><span> _______________________________________________</span><br></blockquote><blockquote type="cite"><span> <a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a> <mailto:<a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a>></span><br></blockquote><blockquote type="cite"><span> Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a></span><br></blockquote><blockquote type="cite"><span> Suggested annual donation $12.96</span><br></blockquote><blockquote type="cite"><span> Archive: <a href="http://www.team.net/pipermail/shop-talk" target="_blank">http://www.team.net/pipermail/shop-talk</a></span><br></blockquote><blockquote type="cite"><span> <a href="http://autox.team.net/archive" target="_blank">http://autox.team.net/archive</a></span><br></blockquote><blockquote type="cite"><span> Unsubscribe/Manage:</span><br></blockquote><blockquote type="cite"><span> <a href="http://autox.team.net/mailman/options/shop-talk/tomshirleysr44@gmail.com" target="_blank">http://autox.team.net/mailman/options/shop-talk/tomshirleysr44@gmail.com</a></span><br></blockquote><blockquote type="cite"><span>_______________________________________________</span><br></blockquote><blockquote type="cite"><span><a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a></span><br></blockquote><blockquote type="cite"><span>Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a></span><br></blockquote><blockquote type="cite"><span>Suggested annual donation $12.96</span><br></blockquote><blockquote type="cite"><span>Archive: <a href="http://www.team.net/pipermail/shop-talk" target="_blank">http://www.team.net/pipermail/shop-talk</a> <a href="http://autox.team.net/archive" target="_blank">http://autox.team.net/archive</a></span><br></blockquote><blockquote type="cite"><span>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/shop-talk/dhlocker@comcast.net" target="_blank">http://autox.team.net/mailman/options/shop-talk/dhlocker@comcast.net</a></span><br></blockquote><span>_______________________________________________</span><br><span></span><br><span><a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a></span><br><span>Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a></span><br><span>Suggested annual donation $12.96</span><br><span>Archive: <a href="http://www.team.net/pipermail/shop-talk" target="_blank">http://www.team.net/pipermail/shop-talk</a> <a href="http://autox.team.net/archive" target="_blank">http://autox.team.net/archive</a></span><br><span></span><br><span>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/shop-talk/nogera@icloud.com" target="_blank">http://autox.team.net/mailman/options/shop-talk/nogera@icloud.com</a></span><br><span></span><br></div></blockquote><span>_______________________________________________</span><br><span></span><br><span><a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a></span><br><span>Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a></span><br><span>Suggested annual donation $12.96</span><br><span>Archive: <a href="http://www.team.net/pipermail/shop-talk" target="_blank">http://www.team.net/pipermail/shop-talk</a> <a href="http://autox.team.net/archive" target="_blank">http://autox.team.net/archive</a></span><br><span></span><br><span>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/shop-talk/patintexas@icloud.com" target="_blank">http://autox.team.net/mailman/options/shop-talk/patintexas@icloud.com</a></span><br><span></span><br></div></div></div></blockquote></div></div></div>_______________________________________________<br>
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