<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">The difference in reaction piston (the small guy) diameter is one of the variables in servo boost ratio. Larger the reaction piston, higher the ratio<div class=""><br class=""></div><div class="">So the Jag master will give a different pedal feel over the Rover. This is actually a supply problem for the Girling 4cyl P6s, as it’s basically the only car that used the 4.25:1 ratio version of the 7” remote servo, and the highest you can now get is 3.00:1</div><div class=""><br class=""></div><div class="">Yours</div><div class="">Vern<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jan 11, 2019, at 7:11 PM, Steve Manwell via Rovernet <<a href="mailto:rovernet@rovernet.org" class="">rovernet@rovernet.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">I have one of these on my 3500S and it seems to work OK. <a href="https://www.welshent.com/Jaguar-Brake-Master-Cylinder-P24162.aspx" class="">https://www.welshent.com/Jaguar-Brake-Master-Cylinder-P24162.aspx</a><br class=""><br class="">The only variation I know of on the Rover and Jaguar master cylinders of this type is that the very small piston and associated O-ring seal between the air valve and the hydraulic side is smaller on one of them. I am not aware of any practical difference in operating function among them.<br class=""><br class="">I have had trouble with leaks from rebuilt units of this type after a couple years of service, even when they are sleeved in stainless, due to some combination of seal material and maybe wear in a plastic bushing that get reused.<br class=""><br class="">--Steve Manwell<br class=""><br class=""><br class="">On 1/11/2019 9:54 PM, Jonathan Present via Rovernet wrote:<br class=""><blockquote type="cite" class="">I am in dire need of a Master Cylinder for this vehicle<br class=""><br class="">I hear there are two types, a Jaguar model that will work, and one made specifically for the Rover, I would prefer the latter<br class=""><br class="">Would anyone happen to have a part number, and a business that would sell me one, U.S.A. preferred, but UK works<br class=""><br class="">Is anyone aware of NOS (new old stock) parts available for this car?<br class=""><br class="">Thank You,<br class=""><br class="">JP<br class="">_______________________________________________<br class="">Rovernet mailing list<br class=""><a href="mailto:Rovernet@rovernet.org" class="">Rovernet@rovernet.org</a><br class="">http://rovernet.org/mailman/listinfo/rovernet_rovernet.org<br class=""><br class=""></blockquote><br class="">_______________________________________________<br class="">Rovernet mailing list<br class=""><a href="mailto:Rovernet@rovernet.org" class="">Rovernet@rovernet.org</a><br class="">http://rovernet.org/mailman/listinfo/rovernet_rovernet.org<br class=""></div></div></blockquote></div><br class=""><div class="">
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