{"id":504,"date":"2021-05-15T14:00:08","date_gmt":"2021-05-15T14:00:08","guid":{"rendered":"https:\/\/www.alphabeta.me.uk\/blog\/?p=504"},"modified":"2021-05-19T12:03:58","modified_gmt":"2021-05-19T12:03:58","slug":"brake-caliper-part-2","status":"publish","type":"post","link":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/2021\/05\/15\/brake-caliper-part-2\/","title":{"rendered":"Brake caliper : Part 2"},"content":{"rendered":"\n<p>When I <a href=\"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/2021\/03\/19\/reassembling-the-brake-caliper\/\" data-type=\"URL\" data-id=\"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/2021\/03\/19\/reassembling-the-brake-caliper\/\">assembled the brake caliper<\/a>, I had thought that the piston was a little cocked in the bore.<br>Naively, I thought that if I assembled the caliper onto the bike, a bit of hydraulic pressure would just pop it straight.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2392-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"2560\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2392-scaled.jpg\" alt=\"\" data-id=\"299\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2392-scaled.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2392\/\" class=\"wp-image-299\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2392-scaled.jpg 1920w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2392-225x300.jpg 225w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2393-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"2560\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2393-scaled.jpg\" alt=\"\" data-id=\"300\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2393-scaled.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2393\/\" class=\"wp-image-300\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2393-scaled.jpg 1920w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/03\/IMG_2393-225x300.jpg 225w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/a><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>Well&#8230; suffice it to say that over the past day I have learned a number of lessons, (3), starting with&#8230;<strong> it won&#8217;t just pop back into place.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-rotated.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"2848\" height=\"3797\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-2848x3797.jpg\" alt=\"\" data-id=\"533\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/?attachment_id=533\" class=\"wp-image-533\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-2848x3797.jpg 2848w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-225x300.jpg 225w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-768x1024.jpg 768w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-1152x1536.jpg 1152w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-1536x2048.jpg 1536w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2572-1600x2133.jpg 1600w\" sizes=\"(max-width: 2848px) 100vw, 2848px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2573-rotated.jpg\"><img decoding=\"async\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2573-rotated.jpg\" alt=\"\" data-id=\"534\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2573-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/?attachment_id=534\" class=\"wp-image-534\"\/><\/a><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>In the interest of &#8220;keeping it as original as possible&#8221;, I built the front brake system onto the bike using an OEM Yamaha rubber brake hose.<br>After bleeding the system for half an hour and removing all the bubbles therein, the brake action was still a spongy as Spongebob Squarepants&#8217; sponge purchased from sponge city on spongeday.<br>This leads to the second lesson. <strong>40 year old rubber hoses are not the answer.<\/strong><br>Anyway, lots of pumping and pressure led to no improvement in the cocked piston, so it had to come off again for investigation.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-1 is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-rotated.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"2848\" height=\"3797\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-2848x3797.jpg\" alt=\"\" data-id=\"532\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/?attachment_id=532\" class=\"wp-image-532\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-2848x3797.jpg 2848w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-225x300.jpg 225w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-768x1024.jpg 768w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-1152x1536.jpg 1152w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-1536x2048.jpg 1536w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2574-1600x2133.jpg 1600w\" sizes=\"(max-width: 2848px) 100vw, 2848px\" \/><\/a><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>&#8230;and the outer seal had broken. New seals on order along with a length of braided steel brake hose.<br>And the third lesson?<br>I had painted the caliper using VHT paint, (as recommended pretty much everywhere). A bit of brake fluid had the paint washing off as iff I hadn&#8217;t let it dry&#8230; which effectively is true.<br>It seems that VHT paint needs a relatively high temperature to cure properly. This brake caliper has had no chance to get warm, let alone hot.<br>So the third lesson? <strong>Read the instruction on the tin.<\/strong><br>Caliper painting can await the cosmetic build now.<\/p>\n\n\n\n<p>The new seals arrived the next day, and were seated in the grooves with copious amounts of brake fluid as a lubricant.<br>This time, the piston slid straight in with light finger pressure only. I&#8217;m not sure if this is a good thing yet, but clearly, use of a G-Clamp as before is not recommended.<br>I can only think that the dust ring, (the narrow one) was not seated properly in it&#8217;s groove when I tried the first time.<br>Now we await delivery of the new brake hose before assembling it all and trying again.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-4 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-rotated.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"2848\" height=\"3797\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-2848x3797.jpg\" alt=\"\" data-id=\"546\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2582\/\" class=\"wp-image-546\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-2848x3797.jpg 2848w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-225x300.jpg 225w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-768x1024.jpg 768w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-1152x1536.jpg 1152w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-1536x2048.jpg 1536w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2582-1600x2133.jpg 1600w\" sizes=\"(max-width: 2848px) 100vw, 2848px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-rotated.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"3024\" height=\"4032\" src=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-rotated.jpg\" alt=\"\" data-id=\"547\" data-full-url=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-rotated.jpg\" data-link=\"https:\/\/www.alphabeta.me.uk\/blog\/img_2583\/\" class=\"wp-image-547\" srcset=\"https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-rotated.jpg 3024w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-225x300.jpg 225w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-768x1024.jpg 768w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-1152x1536.jpg 1152w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-1536x2048.jpg 1536w, https:\/\/www.alphabeta.me.uk\/blog\/wp-content\/uploads\/2021\/05\/IMG_2583-1600x2133.jpg 1600w\" sizes=\"(max-width: 3024px) 100vw, 3024px\" \/><\/a><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>The brake hose, (from Wezmoto), arrived two days later. It is the correct length, and came with a rubber ring around the hose to facilitate fitting into the clamp on the bottom yoke.  <br>The guide which bolts to the fork leg has its own split rubber.<br>It also shipped with included banjo bolts and copper washers of the correct fitment for the bike&#8230; Attention to detail from recommended seller.<br>All fitted and bled through with a decent &#8220;feel&#8221; at the lever, I can consider the brake done, and ensure all the bolts are tightened and torqued down correctly. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>When I assembled the brake caliper, I had thought that the piston was a little cocked in the bore.Naively, I&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/posts\/504"}],"collection":[{"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=504"}],"version-history":[{"count":6,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/posts\/504\/revisions"}],"predecessor-version":[{"id":548,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/posts\/504\/revisions\/548"}],"wp:attachment":[{"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=504"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=504"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alphabeta.me.uk\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}