{"id":3637,"date":"2026-09-29T05:43:52","date_gmt":"2026-09-29T05:43:52","guid":{"rendered":"https:\/\/shop.autoboss.com\/?post_type=product&#038;p=3637"},"modified":"2026-10-09T08:20:31","modified_gmt":"2026-10-09T08:20:31","slug":"autool-ast603-automotive-brake-fluid-changer-pulse-0-5-2-5bar","status":"publish","type":"product","link":"https:\/\/autoboss.com\/es\/product\/autool-ast603-automotive-brake-fluid-changer-pulse-0-5-2-5bar\/","title":{"rendered":"AUTOOL AST603 One-Person Pulsating Brake Fluid Exchanger with Low-Fluid Auto Stop"},"content":{"rendered":"<div class=\"abd-pd\" data-abd-version=\"1\">\n<header class=\"abd-hero\">\n<h3>One-Person Brake Fluid Exchange with Automatic Low-Fluid Stop<\/h3>\n<p class=\"abd-lead\">The AST603 feeds fresh fluid into the reservoir under pressure while used fluid drains at one caliper at a time, so nobody has to pump the brake pedal. It stops on its own when the fresh-fluid bottle runs dry or pressure cannot build.<\/p>\n<ul class=\"abd-facts\">\n<li>One-Person Operation<\/li>\n<li>0.5\u20132.5 bar<\/li>\n<li>1.6 L\/min<\/li>\n<li>One Caliper at a Time<\/li>\n<li>Low-Fluid Auto Stop<\/li>\n<\/ul>\n<\/header>\n<section class=\"abd-sec\" id=\"abd-features\">\n<h4>Key Features<\/h4>\n<ol class=\"abd-features\">\n<li>\n<h5>One-Button Pulsating Exchange<\/h5>\n<p>After the bottle, hoses and reservoir connection are prepared, one button starts the automatic exchange. Two sub-pumps work together to deliver fresh fluid at the set pressure while used fluid is released at each caliper in the prescribed sequence.<\/p>\n<\/li>\n<li>\n<h5>Fluid-Level Monitoring<\/h5>\n<p>If the fresh-fluid container runs out during filling, the machine stops to help keep air out of the brake lines.<\/p>\n<\/li>\n<li>\n<h5>Pressure Monitoring<\/h5>\n<p>The machine also stops if pressure cannot be generated or the pump draws in air.<\/p>\n<\/li>\n<li>\n<h5>Practical Control Layout<\/h5>\n<p>Pressure gauge, pressure adjustment knob, indicator light, metal hose fittings, aviation power plug, safety device and a screw-column quick connector.<\/p>\n<\/li>\n<li>\n<h5>Corrosion-Resistant Hoses<\/h5>\n<p>Flexible hoses made for prolonged contact with brake fluid and other service chemicals.<\/p>\n<\/li>\n<\/ol>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-compare\">\n<h4>Model Comparison<\/h4>\n<div class=\"abd-table-wrap\">\n<table class=\"abd-table abd-compare\">\n<thead>\n<tr>\n<th scope=\"col\"><\/th>\n<th scope=\"col\" class=\"is-current\">AST603<\/th>\n<th scope=\"col\">AST605<\/th>\n<th scope=\"col\">AST609<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Calipers serviced at once<\/th>\n<td class=\"is-current\">1<\/td>\n<td>1<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Reservoir adapters included<\/th>\n<td class=\"is-current\">1<\/td>\n<td>3<\/td>\n<td>7<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Working pressure<\/th>\n<td class=\"is-current\">0.5\u20132.5 bar<\/td>\n<td>0.7\u20133 bar (\u00b10.2 bar)<\/td>\n<td>0.5\u20132.5 bar<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Fluid bottles<\/th>\n<td class=\"is-current\">1 L used-fluid bottle<\/td>\n<td>1 L used-fluid bottle<\/td>\n<td>1.5 L used-fluid + 1 L fresh-fluid bottle<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Peso<\/th>\n<td class=\"is-current\">5.2 kg<\/td>\n<td>5.3 kg<\/td>\n<td>7.4 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-box\">\n<h4>What&#8217;s in the Box<\/h4>\n<ul class=\"abd-box\">\n<li>AST603 brake fluid exchanger<\/li>\n<li>Aviation-plug power cable<\/li>\n<li>Filling hose<\/li>\n<li>Used brake fluid bottle<\/li>\n<li>Default reservoir adapter<\/li>\n<li>User manual<\/li>\n<\/ul>\n<figure class=\"abd-fig\"><img decoding=\"async\" src=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/ecda6ee8cbe745648832c583.webp\" alt=\"AUTOOL AST603 with power cable, filling hose, used-fluid bottle, reservoir adapter, user manual and retail box\" width=\"1200\" height=\"1200\" loading=\"lazy\"><figcaption>AST603 package contents.<\/figcaption><\/figure>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-use\">\n<h4>How to Use<\/h4>\n<ol class=\"abd-steps\">\n<li><b>Prime the machine<\/b><span>Before first use, bleed the machine so its internal line is filled with brake fluid; fill the vehicle reservoir to the maximum mark.<\/span><\/li>\n<li><b>Connect the adapter<\/b><span>Fit a matching adapter to the brake fluid reservoir and check the cap and hose connections for leaks.<\/span><\/li>\n<li><b>Build initial pressure<\/b><span>Press and hold the start button for 5\u20136 seconds; release once pressure is above 0.6 bar.<\/span><\/li>\n<li><b>Set working pressure<\/b><span>Adjust the working pressure; the operating guide usually recommends about 2 bar.<\/span><\/li>\n<li><b>Open the bleed screw<\/b><span>Loosen the bleed screw on the wheel cylinder or caliper to drain the old fluid.<\/span><\/li>\n<li><b>Watch the drain bottle<\/b><span>Check the layering and color in the used-fluid bottle; the darker layer is the old fluid.<\/span><\/li>\n<li><b>Close, then switch off<\/b><span>Tighten the bleed screw first and only then turn the machine off, so air cannot enter the system.<\/span><\/li>\n<\/ol>\n<p class=\"abd-note\">Full procedure and troubleshooting: <a href=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/150ac52cca3a9920a3e46424.pdf\" target=\"_blank\" rel=\"noopener\">AST603 user manual (PDF)<\/a>.<\/p>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-notes\">\n<h4>Good to Know<\/h4>\n<div class=\"abd-notes\">\n<div class=\"abd-note-group is-caution\">\n<h5><span class=\"abd-tag\">Caution<\/span><\/h5>\n<ul>\n<li>Keep watching the fresh-fluid bottle. If it empties and the machine keeps running, air may enter the brake system.<\/li>\n<li>On vehicles with an electronic power brake pump, use the AST603 together with a diagnostic computer.<\/li>\n<li>Brake fluid is toxic. Wear safety goggles and protective gloves; wash any skin contact with water immediately and remove contaminated clothing.<\/li>\n<li>The single default adapter does not fit every reservoir; check the opening before service.<\/li>\n<\/ul>\n<\/div>\n<div class=\"abd-note-group is-care\">\n<h5><span class=\"abd-tag\">Care<\/span><\/h5>\n<ul>\n<li>Unplug the power cable before working on the machine, and do not open or modify it.<\/li>\n<li>Inspect the machine before each use; stop if anything is abnormal and have it repaired professionally.<\/li>\n<li>Keep the machine dry and do not operate it in damp conditions.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>One-Person Pulsating Exchange:<\/strong> Deliver fresh brake fluid with pulsating pressure while releasing used fluid at the selected caliper.<\/li>\n<li><strong>0.5\u20132.5 Bar Range:<\/strong> Adjust working pressure from 0.5 to 2.5 bar to suit the vehicle\u2019s service procedure.<\/li>\n<li><strong>Low-Fluid Auto Stop:<\/strong> Stop the machine automatically when the new-fluid container runs empty.<\/li>\n<li><strong>No-Pressure\/Air Auto Stop:<\/strong> Shut down if pressure cannot build or the pump draws in air.<\/li>\n<li><strong>Reservoir Adapter Connection:<\/strong> Connect to compatible brake-fluid reservoirs with the matching sealed adapter.<\/li>\n<\/ul>","protected":false},"featured_media":12643,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[128],"product_cat":[62,63],"product_tag":[],"class_list":["post-3637","product","type-product","status-publish","has-post-thumbnail","product_brand-autool","product_cat-best-selling-products","product_cat-brake-fluid-maintenance","first","instock","sale","shipping-taxable","purchasable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product\/3637","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/comments?post=3637"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/media\/12643"}],"wp:attachment":[{"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/media?parent=3637"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product_brand?post=3637"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product_cat?post=3637"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product_tag?post=3637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}