{"id":6177,"date":"2026-05-18T20:55:27","date_gmt":"2026-05-18T20:55:27","guid":{"rendered":"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/"},"modified":"2026-05-18T20:55:27","modified_gmt":"2026-05-18T20:55:27","slug":"2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment","status":"publish","type":"product","link":"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/","title":{"rendered":"2239045 2-inch bore Brake Master Cylinder \u2013 Fits Kenworth, Peterbilt, and Industrial Equipment"},"content":{"rendered":"<div class=\"bp-web-listing\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; color: #333; line-height: 1.6; max-width: 900px; margin: 0 auto; border: 1px solid #eee; padding: 30px; border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.05);\">\n<div class=\"bp-content\" style=\"padding-bottom: 10px;\">\n<h1 style=\"font-size: 26px; color: #111; border-bottom: 2px solid #c00000; padding-bottom: 10px; margin-top: 0; letter-spacing: -0.5px; text-transform: uppercase;\">2239045 2-inch bore Brake Master Cylinder \u2013 Fits Kenworth, Peterbilt, and Industrial Equipment<\/h1>\n<p style=\"font-size: 14px; font-weight: bold; color: #666; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 1px;\">Bexar Pro Components: Precision Parts for Uncompromising Performance.<\/p>\n<div style=\"margin-bottom: 25px; font-size: 16px;\">Ensure reliable, heavy-duty braking control with this brand new <strong>Brake Master Cylinder<\/strong> from <strong>Bexar Pro Components<\/strong>. Engineered with a powerful <strong>2-inch bore size<\/strong>, this master cylinder is a direct replacement for critical braking systems found in <strong>Kenworth and Peterbilt medium-duty commercial trucks<\/strong>, as well as specialized <strong>industrial equipment<\/strong>. Trust in quality that meets or exceeds OEM specifications for casting number <strong>2239045<\/strong>.<\/div>\n<h3 style=\"font-size: 18px; color: #000; margin-bottom: 15px; border-bottom: 1px solid #eee; padding-bottom: 5px;\">Specifications<\/h3>\n<ul style=\"list-style-type: none; padding: 0; margin: 0 0 25px 0;\">\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f4f4f4;\"><strong>Bore Diameter:<\/strong> 2-inch bore size<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f4f4f4;\"><strong>Outlet Size:<\/strong> 1\/2&#8243;-20 INV and 9\/16&#8243;-18 INV<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f4f4f4;\"><strong>Included Sensors:<\/strong> Differential Pressure Switch &amp; Fluid Level Indicator<\/li>\n<li style=\"padding: 8px 0; border-bottom: 1px solid #f4f4f4;\"><strong>Application:<\/strong> Kenworth T170-T370, Peterbilt 325-337, Industrial Fleet<\/li>\n<li style=\"padding: 8px 0;\"><strong>Technical Resources:<\/strong> <a style=\"color: #c00000; font-weight: bold; text-decoration: underline;\" href=\"2024\/01\/HydroMax_Hydraulic_Brake_Booster_Manual.pdf\" target=\"_blank\" rel=\"noopener\">Hydro-Max Technical Manual (PDF)<\/a><\/li>\n<\/ul>\n<div style=\"font-weight: bold; margin-top: 25px; text-transform: uppercase; font-size: 13px; color: #888; letter-spacing: 0.5px;\">Verified Casting &amp; OE Numbers<\/div>\n<div style=\"border-left: 5px solid #c00000; background-color: #f9f9f9; padding: 15px; margin: 5px 0 30px 0; font-family: 'Courier New', Courier, monospace; font-size: 20px; font-weight: bold; color: #000; box-shadow: inset 2px 2px 5px rgba(0,0,0,0.02); line-height: 1.4;\">\u2022 2239045 (Casting Number)<br \/>\n\u2022 0204839670 (PACCAR OE)<\/div>\n<div style=\"border: 2px solid #c00000; padding: 20px; margin: 25px 0; background-color: #fffafa; border-radius: 4px;\"><strong style=\"color: #c00000; text-transform: uppercase; font-size: 16px;\">\u26a0 CRITICAL: Verify Specifications<\/strong><\/p>\n<p style=\"margin-top: 10px; margin-bottom: 0; font-size: 15px;\">To ensure safety in heavy-duty transport, verify that this <strong>2-inch bore size<\/strong> matches your existing unit exactly. Brake master cylinder reservoir material and height <strong>may vary<\/strong>, but the core fit and hydraulic function remain identical. <strong>IMPORTANT:<\/strong> Adaptors on the outlet ports <strong>may be needed<\/strong> to fit your specific vehicle\u2019s brake lines, as this casting number was utilized across multiple assembly configurations.<\/p>\n<\/div>\n<div style=\"font-size: 20px; font-weight: bold; color: #111; margin-top: 35px;\">Expert Installation &amp; Field Note<\/div>\n<div style=\"background-color: #fcfcfc; border: 1px solid #e5e5e5; padding: 25px; border-radius: 6px; margin-top: 10px; font-style: italic; line-height: 1.5; color: #444;\">\n<p style=\"margin: 0;\">Drawing on <strong>our shop experience specializing in heavy-duty brakes since 1985<\/strong>, we emphasize that pushrod alignment is vital for Kenworth and Peterbilt premium chassis. Always bench bleed the master cylinder before installation to remove all trapped air. Ensure the pushrod is perfectly centered; in 2-inch bore systems, even a slight misalignment can lead to premature seal wear under the high-pressure demands of vocational fleet operation.<\/p>\n<\/div>\n<\/div>\n<div class=\"bp-banner-wrap\" style=\"display: flex; align-items: stretch; border: 4px solid #c00000; margin-top: 40px; border-radius: 6px; overflow: hidden; min-height: 120px; background: #c00000;\">\n<div style=\"flex: 1; padding: 20px; background-color: #ffffff; display: flex; justify-content: center; align-items: center; border-right: 2px solid #c00000;\"><img decoding=\"async\" style=\"width: 240px; height: auto; max-width: 100%;\" src=\"2026\/03\/bexar-pro-01-1.png\" alt=\"Bexar Pro\" \/><\/div>\n<div style=\"flex: 1.5; background-color: #c00000; color: #ffffff; padding: 25px; font-size: 28px; font-weight: 800; display: flex; align-items: center; justify-content: center; text-align: right; letter-spacing: 1px;\">SKU: 10804276-BEX<\/div>\n<\/div>\n<div style=\"text-align: center; margin-top: 30px;\"><a style=\"background: #333; color: #fff; padding: 14px 28px; text-decoration: none; border-radius: 4px; font-weight: bold; display: inline-block; font-size: 14px;\" href=\"https:\/\/automotivebrakeandclutch.com\/master-cylinder-replacement\/\" target=\"_blank\" rel=\"noopener\"><br \/>\nOfficial Master Cylinder Installation Guide<br \/>\n<\/a><\/div>\n<div style=\"text-align: center; padding: 20px; font-weight: bold; font-size: 12px; color: #aaa; text-transform: uppercase; letter-spacing: 1px; margin-top: 10px;\">Bexar Pro Components | San Antonio, TX | Since 1985<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>2239045 2-inch bore Brake Master Cylinder \u2013 Fits Kenworth, Peterbilt, and Industrial Equipment Bexar Pro Components: Precision Parts for Uncompromising Performance. Ensure reliable, heavy-duty braking control with this brand new Brake Master Cylinder from Bexar Pro Components. Engineered with a powerful 2-inch bore size, this master cylinder is a direct replacement for critical braking systems<\/p>\n","protected":false},"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"product_brand":[18],"product_cat":[25,17],"product_tag":[],"class_list":{"0":"post-6177","1":"product","2":"type-product","3":"status-publish","5":"product_brand-bexar-pro-componets","6":"product_cat-master-cylinders-for-hydromax","7":"product_cat-view-all-products","9":"first","10":"instock","11":"taxable","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2239045 Master Cylinder | 2-inch Bore | Kenworth T370 Peterbilt 337 | Bexar Pro<\/title>\n<meta name=\"description\" content=\"New 2-inch bore Hydromax Master Cylinder (Casting 2239045). Direct replacement for Kenworth T270\/T370 and Peterbilt 330\/337. Heavy-duty reliability by Bexar Pro Components.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2239045 Master Cylinder | 2-inch Bore | Kenworth T370 Peterbilt 337 | Bexar Pro\" \/>\n<meta property=\"og:description\" content=\"New 2-inch bore Hydromax Master Cylinder (Casting 2239045). Direct replacement for Kenworth T270\/T370 and Peterbilt 330\/337. Heavy-duty reliability by Bexar Pro Components.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/\" \/>\n<meta property=\"og:site_name\" content=\"Automotive Brake &amp; Clutch\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/index.php\\\/product\\\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\\\/\",\"url\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/index.php\\\/product\\\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\\\/\",\"name\":\"2239045 Master Cylinder | 2-inch Bore | Kenworth T370 Peterbilt 337 | Bexar Pro\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/#website\"},\"datePublished\":\"2026-05-18T20:55:27+00:00\",\"description\":\"New 2-inch bore Hydromax Master Cylinder (Casting 2239045). Direct replacement for Kenworth T270\\\/T370 and Peterbilt 330\\\/337. Heavy-duty reliability by Bexar Pro Components.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/index.php\\\/product\\\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/automotivebrakeandclutch.com\\\/index.php\\\/product\\\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/index.php\\\/product\\\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/index.php\\\/shop\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"2239045 2-inch bore Brake Master Cylinder \u2013 Fits Kenworth, Peterbilt, and Industrial Equipment\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/#website\",\"url\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/\",\"name\":\"Automotive Brake &amp; Clutch\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/automotivebrakeandclutch.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"2239045 Master Cylinder | 2-inch Bore | Kenworth T370 Peterbilt 337 | Bexar Pro","description":"New 2-inch bore Hydromax Master Cylinder (Casting 2239045). Direct replacement for Kenworth T270\/T370 and Peterbilt 330\/337. Heavy-duty reliability by Bexar Pro Components.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/","og_locale":"en_US","og_type":"article","og_title":"2239045 Master Cylinder | 2-inch Bore | Kenworth T370 Peterbilt 337 | Bexar Pro","og_description":"New 2-inch bore Hydromax Master Cylinder (Casting 2239045). Direct replacement for Kenworth T270\/T370 and Peterbilt 330\/337. Heavy-duty reliability by Bexar Pro Components.","og_url":"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/","og_site_name":"Automotive Brake &amp; Clutch","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/","url":"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/","name":"2239045 Master Cylinder | 2-inch Bore | Kenworth T370 Peterbilt 337 | Bexar Pro","isPartOf":{"@id":"https:\/\/automotivebrakeandclutch.com\/#website"},"datePublished":"2026-05-18T20:55:27+00:00","description":"New 2-inch bore Hydromax Master Cylinder (Casting 2239045). Direct replacement for Kenworth T270\/T370 and Peterbilt 330\/337. Heavy-duty reliability by Bexar Pro Components.","breadcrumb":{"@id":"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/automotivebrakeandclutch.com\/index.php\/product\/2239045-2-inch-bore-brake-master-cylinder-fits-kenworth-peterbilt-and-industrial-equipment\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/automotivebrakeandclutch.com\/"},{"@type":"ListItem","position":2,"name":"Shop","item":"https:\/\/automotivebrakeandclutch.com\/index.php\/shop\/"},{"@type":"ListItem","position":3,"name":"2239045 2-inch bore Brake Master Cylinder \u2013 Fits Kenworth, Peterbilt, and Industrial Equipment"}]},{"@type":"WebSite","@id":"https:\/\/automotivebrakeandclutch.com\/#website","url":"https:\/\/automotivebrakeandclutch.com\/","name":"Automotive Brake &amp; Clutch","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/automotivebrakeandclutch.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"wcpa_form_fields":null,"_links":{"self":[{"href":"https:\/\/automotivebrakeandclutch.com\/index.php\/wp-json\/wp\/v2\/product\/6177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/automotivebrakeandclutch.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/automotivebrakeandclutch.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/automotivebrakeandclutch.com\/index.php\/wp-json\/wp\/v2\/comments?post=6177"}],"wp:attachment":[{"href":"https:\/\/automotivebrakeandclutch.com\/index.php\/wp-json\/wp\/v2\/media?parent=6177"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/automotivebrakeandclutch.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=6177"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/automotivebrakeandclutch.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=6177"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/automotivebrakeandclutch.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=6177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}