{"id":6158,"date":"2024-11-13T17:20:04","date_gmt":"2024-11-13T17:20:04","guid":{"rendered":"https:\/\/www.micoequipment.com\/blog\/?p=6158"},"modified":"2024-11-21T17:22:05","modified_gmt":"2024-11-21T17:22:05","slug":"used-2009-komatsu-d39ex-21-crawler-dozer-for-sale","status":"publish","type":"post","link":"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/","title":{"rendered":"Used 2009 KOMATSU D39EX-21 Crawler Dozer for Sale"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"800\" src=\"https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale.jpg\" alt=\"Used 2009 KOMATSU D39EX-21 Crawler Dozer for Sale\" class=\"wp-image-6159\" srcset=\"https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale.jpg 1000w, https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-300x240.jpg 300w, https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-768x614.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n<p>In Houston, the local and international accreditation bodies have defined clear safety measures and codes for heavy construction and earthmoving tasks. In challenging terrain, the incidents of machine tripping and rollovers are considerable. Crawler dozers are fortified with a robust track-based design to provide excellent traction and stability. For <strong>unmatched power and precision of a <a href=\"https:\/\/www.micoequipment.com\/product\/2009-KOMATSU-D39EX-21-Dozers-Crawler\">used 2009 KOMATSU D39EX-21 crawler dozer for sale<\/a>, <\/strong>contact Mico Equipment.<\/p>\n\n\n\n<p>Indeed, the KOMATSU D39EX-21 dozer is compact yet purpose-built to uphold rugged construction sites. This model is fortified with a Komatsu SAA4D107E-1 engine with a four-cylinder, delivering 105 horsepower to push and grade heavy materials. D39EX-21 offers fuel efficiency and advanced hydraulic systems for responsive blade control. Moreover, it has a unique hydrostatic transmission for flawless maneuverability.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #848484;color:#848484\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #848484;color:#848484\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Advantages_and_Features_of_D39EX-21_Crawler_Dozer\" >Advantages and Features of D39EX-21 Crawler Dozer<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Komatsu_SAA4D107E-1_Engine\" >Komatsu SAA4D107E-1 Engine&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Precise_Hydrostatic_Transmission\" >Precise Hydrostatic Transmission&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Responsive_Blade_Control\" >Responsive Blade Control<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Undercarriage_and_Track_Design\" >Undercarriage and Track Design<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#High-Visibility_Operator_Cab\" >High-Visibility Operator Cab<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Durability_and_Maintenance_Advantages\" >Durability and Maintenance Advantages<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#KOMATSU_D39EX_Reliability_and_Adaptability_for_Diverse_Projects\" >KOMATSU D39EX Reliability and Adaptability for Diverse Projects<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Modifications_for_Enhancing_Used_D39EX-21_Crawler_Dozer_Efficiency\" >Modifications for Enhancing Used D39EX-21 Crawler Dozer Efficiency<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#3D_GPS_Blade_Control_Systems\" >3D GPS Blade Control Systems<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Engine_Upgrades_for_Fuel_Efficiency\" >Engine Upgrades for Fuel Efficiency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#High-Flow_Hydraulic_System_for_Responsiveness\" >High-Flow Hydraulic System for Responsiveness<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Undercarriage_Modifications_for_Versatility\" >Undercarriage Modifications for Versatility<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Cab_Comfort_and_Control_Enhancements\" >Cab Comfort and Control Enhancements<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Komtrax_Remote_Monitoring_Upgrades\" >Komtrax Remote Monitoring Upgrades&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Attachments_for_Expanding_Functionality\" >Attachments for Expanding Functionality<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Radiator_and_Cooling_System_Upgrades\" >Radiator and Cooling System Upgrades<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/#Quality_Tested_Used_Crawler_Dozer_Near_Me\" >Quality Tested Used Crawler Dozer Near Me<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Advantages_and_Features_of_D39EX-21_Crawler_Dozer\"><\/span>Advantages and Features of D39EX-21 Crawler Dozer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The <strong><a href=\"https:\/\/www.micoequipment.com\/used-construction-equipment\">used KOMATSU crawler dozers for sale<\/a><\/strong> are cost-effective and reliable for surface leveling over sloppy and tight spaces. D39EX-21 offers a range of technical features to deliver precise and efficient earthmoving. Thus, it is categorized as a mid-size dozer.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Komatsu_SAA4D107E-1_Engine\"><\/span>Komatsu SAA4D107E-1 Engine&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Engine Type &amp; Power<\/strong><\/td><td>It is powered by a 4.5-liter four-chambered Komatsu engine that produces 105 horsepower. This powerful motor can push an enormous number of materials.<\/td><\/tr><tr><td><strong>Fuel Efficiency<\/strong><\/td><td>This crawler dozer is designed with Tier 3 emissions technology, which minimizes fuel usage and gaseous emissions. This results in lower running costs and greener operations.<\/td><\/tr><tr><td><strong>Cooling System<\/strong><\/td><td>The huge parallel-to-one radiator and hydraulic cooler are incredibly effective. They maintain appropriate operating temperatures even under extreme conditions. Moreover, it increases engine life and performance.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Precise_Hydrostatic_Transmission\"><\/span>Precise Hydrostatic Transmission&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Enhanced Maneuverability<\/strong><\/td><td>Hydrostatic transmission (HST) provides autonomous control of the left and right tracks. It will facilitate unusual maneuverability over rugged terrain.<\/td><\/tr><tr><td><strong>Variable Speed Control<\/strong><\/td><td>With variable speed control, operators accurately manage the dozer&#8217;s speed, which complements the workload demands. This approach offers precision while minimizing engine strain.<\/td><\/tr><tr><td><strong>Smooth Directional Shifts<\/strong><\/td><td>The HST provides for seamless forward and reverse shifting. It is essential for applications requiring frequent repositioning, typically grading over sloppy terrains.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Responsive_Blade_Control\"><\/span>Responsive Blade Control<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Hydraulic Blade Control<\/strong><\/td><td><strong>used a 2009 KOMATSU D39EX-21 crawler dozer for sale with<\/strong> a highly responsive hydraulic system. It supports precise movement of blades, assuring shortened and uninterrupted processes.<\/td><\/tr><tr><td><strong>Power Angle Tilt (PAT) Blade<\/strong><\/td><td>This blade can move and tilt at various angles and is 10 feet wide in measurement. Thus making it ideal for challenging earthmoving and grading projects. Moreover, the tilt angle is 25 degrees to work over hilly terrains.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Undercarriage_and_Track_Design\"><\/span>Undercarriage and Track Design<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>EX Undercarriage Model<\/strong><\/td><td>Obviously, the ex-undercarriage version is intended for stability, with a larger footprint and lower ground pressure.<\/td><\/tr><tr><td><strong>Track System<\/strong><\/td><td>D39EX-21 has a 22-inch-wide track shoe with durable material and stronger track links and rollers. This reliability decreases maintenance frequency and assures longevity. Track shape is handy in loose, sandy, or muddy areas.<\/td><\/tr><tr><td><strong>Minimal Ground Pressure<\/strong><\/td><td>This crawler dozer has the most minor ground disturbance with 5.7 psi ground pressure. Therefore, it suits sensitive terrain management, including landscaping and pipeline installation.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"High-Visibility_Operator_Cab\"><\/span>High-Visibility Operator Cab<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Visibility &amp; Ergonomics<\/strong><\/td><td>The used crawler dozers from Komatsu have comfortable cabs that give drivers a great view of the blade surface and surroundings.<\/td><\/tr><tr><td><strong>Operator Comfort<\/strong><\/td><td>An intuitive control arrangement and customizable seat reduce worker fatigue and increase productivity. Climate management options improve operator comfort and focus in varying weather situations.<\/td><\/tr><tr><td><strong>Komtrax Monitoring System<\/strong><\/td><td>Indeed, a remote monitoring system enables real-time evaluation of dozer engine performance, fuel consumption, and maintenance requirements.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Durability_and_Maintenance_Advantages\"><\/span>Durability and Maintenance Advantages<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Robust Build<\/strong><\/td><td>The D39EX-21 is constructed with Komatsu&#8217;s finest metal parts. The dozer chassis can endure high-stress situations, making it ideal for extensive use.<\/td><\/tr><tr><td><strong>Easy Access for Maintenance<\/strong><\/td><td>The side-mounted combustion chamber and standardized service points simplify periodic servicing. It reduces downtime and keeps the unit in excellent condition.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"800\" src=\"https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-houston-texas.jpg\" alt=\"Used 2009 KOMATSU D39EX-21 Crawler Dozer for Sale in Houston Texas\" class=\"wp-image-6160\" srcset=\"https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-houston-texas.jpg 1000w, https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-houston-texas-300x240.jpg 300w, https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-houston-texas-768x614.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"KOMATSU_D39EX_Reliability_and_Adaptability_for_Diverse_Projects\"><\/span>KOMATSU D39EX Reliability and Adaptability for Diverse Projects<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The <strong>Used 2009 KOMATSU D39EX-21 <a href=\"https:\/\/www.micoequipment.com\/\">crawler dozer for sale<\/a><\/strong> provides remarkable reliability and efficiency over a wide range of construction sites. Mico Equipment offers quality-tested products with professional customer support. It\u2019s a versatile mid-size structure, and advanced engineering performs various tasks.\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Land Clearing and Site Preparation<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The D39EX&#8217;s Hydrostatic Transmission ensures seamless operation and exact blade modifications. Thus making it excellent for clearing trees, flattening terrain, and planning construction sites. Its L-shaped pusher arms improve blade visibility, allowing the operator to operate closer with more precision.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Road Building and Maintenance<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Remarkably, the Komatsu crawler dozer&#8217;s strong blade and high-traction axle are effective for road construction and maintenance. The dozer&#8217;s minimal ground pressure reduces compacted soil. It will protect the strength of foundations in roadbeds and improve overall construction quality.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Slope and Embankment Work<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The machine&#8217;s mid-sized chassis and equilibrium features enable it to navigate moderate slopes. Notably, it is deployed over gardening, trench leveling, and drainage systems. The Komatsu Terrain Controller aids the dozers to optimize equal weight distribution to prevent slippage.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mining and Quarrying<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The D39EX is widely utilized for waste removal, curve surface grading, and access road management in mining operations. Its power and traction tackle harsh quarry conditions well. Moreover, its cab structure keeps the operator safe in high-debris settings.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Landfill and Waste Management<\/strong><\/li>\n<\/ul>\n\n\n\n<p>With appropriate protection packages, the <strong>Komatsu used crawler dozers for sale<\/strong> to conduct safe landfill management. Operators compact garbage and manage dirt layers. Its flexible undercarriage and substantial ground clearance keep trash from clogging the tracks. Hence, it maintains effectiveness even in high-waste-density areas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Modifications_for_Enhancing_Used_D39EX-21_Crawler_Dozer_Efficiency\"><\/span>Modifications for Enhancing Used D39EX-21 Crawler Dozer Efficiency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>When you&#8217;re looking to improve the performance and efficiency of the D39EX-21 Crawler Dozer, there are a variety of aftermarket modifications, and Komatsu-approved improvements are available. These upgrades increase the machine&#8217;s functionality and improve overall productivity.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"800\" src=\"https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-houston-tx.jpg\" alt=\"Used 2009 KOMATSU D39EX-21 Crawler Dozer for Sale in Houston Tx\" class=\"wp-image-6161\" srcset=\"https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-houston-tx.jpg 1000w, https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-houston-tx-300x240.jpg 300w, https:\/\/www.micoequipment.com\/blog\/wp-content\/uploads\/2024\/11\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale-houston-tx-768x614.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3D_GPS_Blade_Control_Systems\"><\/span>3D GPS Blade Control Systems<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Retrofitting the D39EX-21 with a <strong>Topcon 3D-MC GPS blade control<\/strong> improves grading efficiency and accuracy. The GPS communicates with sensors to give real-time blade positioning and adjustment. This enables fewer passes to meet targets. The <strong>semi-automatic blade<\/strong> automatically empowers the dozer to modify cutting height and angle for predefined grade criteria. This can significantly minimize worker fatigue and learning time. However, maintaining consistent results is valuable for precision finishing work.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engine_Upgrades_for_Fuel_Efficiency\"><\/span>Engine Upgrades for Fuel Efficiency<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Upgrading the D39EX-21s with appropriate <strong>diesel particulate filter (DPF)<\/strong> control emissions improves its environmental profile. DPFs catch pollutants before they escape the exhaust. They are resulting in improved air quality and compliance with Tier 4 requirements. Some filters also improve fuel efficiency by resulting in a cleaner combustion cycle.&nbsp;<\/p>\n\n\n\n<p><strong>Customizing the Komatsu SAA4D107E-1<\/strong> engine can increase horsepower and gasoline economy. Furthermore, it improves operational efficiency for heavy-duty operations. Tuning can change injecting time to boost fuel burn and improve engine performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High-Flow_Hydraulic_System_for_Responsiveness\"><\/span>High-Flow Hydraulic System for Responsiveness<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Using a <strong>high-flow hydraulic pump<\/strong> helps blade response time and overall fluidity. Precise-flow pumps improve the hydraulic system&#8217;s effectiveness and faster blade adjustments. It is applicable for high precision over intricate landscaping. <strong>Auxiliary hydraulics<\/strong> to increase attachment versatility, including rippers, lifts, and specialist blades. This improvement increases the dozer&#8217;s adaptability. It allows it to perform jobs other than typical grading and earthmoving.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Undercarriage_Modifications_for_Versatility\"><\/span>Undercarriage Modifications for Versatility<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Upgrading the traditional <strong>22-inch track shoes<\/strong> with larger ones will lower ground pressure. This is a valuable tactic for working on soft, slippery, or fragile terrains. This modification improves floating, allowing the dozer to run efficiently without causing undue ground disturbance.&nbsp;<\/p>\n\n\n\n<p>In harsher situations, <strong>powerful track rollers and strengthened chains <\/strong>are used. They can be fitted to increase the life of the undercarriage, particularly in hilly or sandy terrains. These parts are built of hardened steel to tolerate excessive wear and tear. This <strong>used 2009 KOMATSU D39EX-21 crawler dozer is for sale.<\/strong>&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cab_Comfort_and_Control_Enhancements\"><\/span>Cab Comfort and Control Enhancements<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Replacing the dozer cab seat with modern ergonomics sitting and temperature control helps to increase work efficiency. Likewise, automatic joystick-assisted hydraulic controls are critical for precise maneuvering. <strong>Upgraded HVAC systems<\/strong> guarantee the cab is pleasant regardless of the outside weather. <strong>Enhanced acoustics<\/strong> reduce noise, permitting work with fewer distractions. This is particularly useful in high-noise conditions or over extended operational hours.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Komtrax_Remote_Monitoring_Upgrades\"><\/span>Komtrax Remote Monitoring Upgrades&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Integrating the latest <strong>Komtrax telematics system<\/strong> gives customers more precise data on fuel usage, functional hours, and part wear. They are updated to <strong>track idle duration<\/strong> and fuel usage in real time. This knowledge helps operators modify and minimize idle time to improve fuel efficiency. Tracking these parameters is especially useful for contractors to keep fuel expenditures to a minimum.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Attachments_for_Expanding_Functionality\"><\/span>Attachments for Expanding Functionality<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>D39EX-21 expands its capabilities for demolition and removing hard ground surfaces. <strong>Rippers<\/strong> are perfect for tearing compacted and old pavement. Likewise, a <strong>winch<\/strong> attachment adds pulling strength to the D39EX-21, making it ideal for clearing fallen trees. This improvement is especially useful in rural or off-road settings when carrying large objects requires more force.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Radiator_and_Cooling_System_Upgrades\"><\/span>Radiator and Cooling System Upgrades<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A <strong>high-capacity radiator<\/strong> can operate in hot surroundings and be used for heavy-duty purposes without overheating. Refined cooling technologies keep the combustion temperature steady, extending engine life. Using <strong>variable-speed controls<\/strong> to mitigate engine heat production. This allows the D39EX-21 to function in demanding situations, reducing the risk of overheating.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"Quality_Tested_Used_Crawler_Dozer_Near_Me\"><\/span>Quality Tested Used Crawler Dozer Near Me<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Invest in the<strong> <a href=\"https:\/\/www.micoequipment.com\/product\/2009-KOMATSU-D39EX-21-Dozers-Crawler\">used 2009 KOMATSU D39EX-21 Crawler Dozer for sale<\/a>,<\/strong> combining strength, efficiency, and versatility. With the option for various aftermarket improvements, this model is adaptable for modern construction, grading, and earthmoving business.\u00a0<\/p>\n\n\n\n<p>Mico Equipment provides high-quality secondhand construction machinery for sale in Houston, TX, to assure top performance. Contact us to learn more about upgrading your company with dependable and powerful machinery.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Houston, the local and international accreditation bodies have defined clear safety measures and codes for heavy construction and earthmoving tasks. In challenging terrain, the incidents of machine tripping and rollovers are considerable. Crawler dozers are fortified with a robust track-based design to provide excellent traction and stability. For unmatched [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":6159,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[622],"tags":[],"class_list":["post-6158","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-crawler-dozer"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Used 2009 KOMATSU D39EX-21 Crawler Dozer for Sale - Used Equipment<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.micoequipment.com\/blog\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\/\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"adminX\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\\\/\"},\"author\":{\"name\":\"adminX\",\"@id\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/#\\\/schema\\\/person\\\/517389fb9c9115b14c41fe037e7db48e\"},\"headline\":\"Used 2009 KOMATSU D39EX-21 Crawler Dozer for Sale\",\"datePublished\":\"2024-11-13T17:20:04+00:00\",\"dateModified\":\"2024-11-21T17:22:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\\\/\"},\"wordCount\":1611,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/11\\\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale.jpg\",\"articleSection\":[\"Crawler Dozer\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\\\/\",\"url\":\"https:\\\/\\\/www.micoequipment.com\\\/blog\\\/used-2009-komatsu-d39ex-21-crawler-dozer-for-sale\\\/\",\"name\":\"Used 2009 KOMATSU D39EX-21 Crawler Dozer for Sale - 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