{"id":53897,"date":"2021-01-18T15:42:05","date_gmt":"2021-01-18T21:42:05","guid":{"rendered":"https:\/\/www.moderndriveline.com\/resources\/?p=53897"},"modified":"2021-01-18T15:42:05","modified_gmt":"2021-01-18T21:42:05","slug":"external-hydraulics-faq-and-troubleshooting","status":"publish","type":"post","link":"https:\/\/www.moderndriveline.com\/resources\/external-hydraulics-faq-and-troubleshooting\/","title":{"rendered":"External Hydraulics FAQ&#8217;s &#038; Troubleshooting Solutions"},"content":{"rendered":"<p><strong>Some of the questions we get here at MDL are listed below with the answers we provide as a solution or advice on procedure.<\/strong><strong>We hope you find it helpful.<\/strong>&nbsp;<span style=\"color: #800000;\"><strong>The slave cylinder piston popped out \u2013 why?<\/strong><\/span><\/p>\n<ul>\n<li><span style=\"color: #808080;\">The only reason a slave cylinder piston pops out is improper set-up and initial adjustment. The slave cylinder rod must be adjusted to \u201cZero Lash\u201d. This means the <em>piston<\/em> of the slave cylinder is completely compressed in the <em>bore<\/em> of the slave cylinder AND the fork (lever) is pushed all the way forward so the throw-out bearing is making contact (not preloaded) with the fingers on the pressure plate. Adjust the supplied slave cylinder rod to achieve this configuration. See installation instructional paragraph starting with the words \u201cSet-up\u201d.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<span style=\"color: #800000;\"><strong>Can I get a replacement piston or rebuild kit for my master or slave cylinder?<\/strong><\/span><\/p>\n<ul>\n<li><span style=\"color: #808080;\">These are not rebuildable units if they are damaged. <span style=\"color: #ff0000;\"><strong><em>Modern DriveLine<\/em><\/strong><\/span> does offer replacement cylinders for purchased kits and comes with new fittings and o-rings.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<span style=\"color: #800000;\"><strong>My clutch does not release \u2013 what do I check?<\/strong><\/span><\/p>\n<ul>\n<li><span style=\"color: #808080;\">Make sure the slave cylinder ROD is traveling 1.2\u201d as indicated in the installation instructional paragraph starting with \u201cImportant\u201d.<\/span><\/li>\n<li><span style=\"color: #808080;\">Make sure the master cylinder rod attached to the lever under the dash travels 1.4\u201d as indicated in the installation instructional paragraph called \u201cverify actuation\u201d.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<strong><span style=\"color: #800000;\">My clutch fork (lever) is moving 1.2\u201d but my clutch still won\u2019t release.<\/span><\/strong><\/p>\n<ul>\n<li><span style=\"color: #808080;\">Make sure you are measuring the rod movement and not measuring at the end of the fork.<\/span><\/li>\n<li><span style=\"color: #808080;\">What kind of pressure plate are you running? \u2013 This system requires a diaphragm style pressure plate with a \u201cquick release\u201d rate of 3\/8\u201d. 3-finger clutch pressure plates have a longer \u00bd\u201d release and must be replaced to work with this system.<\/span><\/li>\n<li><span style=\"color: #808080;\">You have some sort of misalignment or binding condition of the transmission unrelated to the hydraulics. Check for input shaft length\/clearance to crank, disk to bearing retainer, and splines to bushing\/bearing \u2013 all must have clearance.<\/span><\/li>\n<li><span style=\"color: #808080;\">Check the thrust bearing on your crank. Verify this by pushing\/pulling on harmonic balancer or flywheel \u2013 the crank thrust must fall within spec requirements \u2013 usually .008 or less.<\/span><\/li>\n<li><span style=\"color: #808080;\">Make sure all bolts are tight. Bell to block, and bell to trans.<\/span><\/li>\n<li><span style=\"color: #808080;\">Check bolts holding slave cylinder and bracket to transmission are tight.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<span style=\"color: #800000;\"><strong>I can\u2019t get the slave cylinder rod to travel 1.2\u201d when moving the pedal.<\/strong><\/span><\/p>\n<ul>\n<li><span style=\"color: #808080;\">Make sure the master cylinder rod attached to the lever under the dash travels 1.4\u201d.<\/span><\/li>\n<li><span style=\"color: #808080;\">You still have air in the system if the clutch pedal is spongy at the top. You must have immediate movement of the slave cylinder when the pedal is actuated.<\/span><\/li>\n<li><span style=\"color: #808080;\">Check the firewall for flexing where the master cylinder is mounted \u2013 damaged, custom or extremely rusty cars may have firewall flex.<\/span><\/li>\n<li><span style=\"color: #808080;\">Bleed the system per the master cylinder instructions. Use the Bleeder kit instructions supplied with the master cylinder kit. These instructions can also be found on-line.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<span style=\"color: #800000;\"><strong>I can\u2019t get my system to gravity bleed.<\/strong><\/span><\/p>\n<ul>\n<li><span style=\"color: #808080;\">Accomplish gravity bleeding by making sure the reservoir cap and bladder are removed and there is no pressure on the master cylinder rod. To make sure of this, disconnect the master cylinder linkage from the pedal.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<span style=\"color: #800000;\"><strong>I have leaks at the fittings.<\/strong><\/span><\/p>\n<ul>\n<li><span style=\"color: #808080;\">The elbow fittings in the master and slave are not tight. Once you have positioned the steel braided line in the vehicle, tighten the fittings making sure the o-rings do not protrude out. The bleeder screw on the slave cylinder is seating steel against aluminum. If you have trouble with this joint sealing\u2026 open and close the bleeder screw several times until there is no more leak; it should seat more with each tightening and loosening until a complete seat is formed.<\/span><\/li>\n<\/ul>\n<p>&nbsp; &nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Some of the questions we get here at MDL are listed below with the answers we provide to help you.<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[12,122,57,99],"tags":[398,372],"class_list":["post-53897","post","type-post","status-publish","format-standard","hentry","category-ford-featured-cars","category-gm-featured-cars","category-hydraulic-clutch-kits-videos","category-questions-answers","tag-clutch-fork","tag-hydraulics"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/posts\/53897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/comments?post=53897"}],"version-history":[{"count":0,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/posts\/53897\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/media?parent=53897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/categories?post=53897"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.moderndriveline.com\/resources\/wp-json\/wp\/v2\/tags?post=53897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}