{"id":991,"date":"2026-04-20T06:43:02","date_gmt":"2026-04-20T06:43:02","guid":{"rendered":"https:\/\/relystone.com\/?p=991"},"modified":"2026-04-20T06:43:04","modified_gmt":"2026-04-20T06:43:04","slug":"swing-arm-half-motor-drive-unit-monorail-locomotive","status":"publish","type":"post","link":"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/","title":{"rendered":"Swing-Arm Half-Motor Drive Unit for Monorail Transport Locomotives: Structure, Braking &#038; Maintenance Guide"},"content":{"rendered":"<p>The&nbsp;<strong>swing-arm half-motor drive unit<\/strong>&nbsp;is a compact, modular traction device designed for monorail transport locomotives operating on I140E\/I140V rail systems in underground coal mines. Built to adapt to varying gradient conditions, the swing-arm half-motor drive unit features a dual-brake system, fail-safe hydraulic braking, and a direct-drive radial piston motor \u2014 making it one of the most reliable and low-maintenance drive solutions available for underground monorail haulage applications.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey 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: #999;color:#999\" 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: #999;color:#999\" 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:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#What_Is_a_Swing-Arm_Half-Motor_Drive_Unit\" >What Is a Swing-Arm Half-Motor Drive Unit?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Drive_Unit_Structure_and_Key_Components\" >Drive Unit Structure and Key Components<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#1_Drive_Bracket_Swing-Arm_Frame\" >1. Drive Bracket (Swing-Arm Frame)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#2_Radial_Piston_Hydraulic_Motor\" >2. Radial Piston Hydraulic Motor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#3_Friction_Wheel\" >3. Friction Wheel<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#4_Dual_Brake_System\" >4. Dual Brake System<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Braking_System_How_It_Works\" >Braking System: How It Works<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Normal_Operation\" >Normal Operation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Emergency_Braking\" >Emergency Braking<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Braking_Performance_Standards\" >Braking Performance Standards<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Technical_Specifications_%E2%80%94_DC03-03B\" >Technical Specifications \u2014 DC03-03B<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Maintenance_and_Inspection_Guide\" >Maintenance and Inspection Guide<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#51_Routine_Inspection_Checklist\" >5.1 Routine Inspection Checklist<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Clamping_Cylinders\" >Clamping Cylinders<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Friction_Wheel_Hub_Bolts\" >Friction Wheel Hub Bolts<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Load_Wheel_Bolt_Axles\" >Load Wheel Bolt Axles<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Brake_Pads_%E2%80%94_Wear_Limit\" >Brake Pads \u2014 Wear Limit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Friction_Wheel_%E2%80%94_Wear_Damage_Inspection\" >Friction Wheel \u2014 Wear &amp; Damage Inspection<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#52_Lubrication_Requirements\" >5.2 Lubrication Requirements<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#What_rail_systems_is_the_swing-arm_half-motor_drive_unit_compatible_with\" >What rail systems is the swing-arm half-motor drive unit compatible with?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Why_use_a_direct-drive_radial_piston_motor_instead_of_a_gearbox-driven_system\" >Why use a direct-drive radial piston motor instead of a gearbox-driven system?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#What_happens_if_the_hydraulic_system_fails_while_the_locomotive_is_on_a_gradient\" >What happens if the hydraulic system fails while the locomotive is on a gradient?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Can_the_braking_pressure_be_adjusted_for_different_mine_conditions\" >Can the braking pressure be adjusted for different mine conditions?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#How_often_should_brake_pads_be_inspected\" >How often should brake pads be inspected?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/relystone.com\/ja\/2026\/04\/20\/swing-arm-half-motor-drive-unit-monorail-locomotive\/#Custom_Monorail_Transport_Locomotive_Drive_Units_%E2%80%94_Get_a_Quote\" >Custom Monorail Transport Locomotive Drive Units \u2014 Get a Quote<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_a_Swing-Arm_Half-Motor_Drive_Unit\"><\/span>What Is a Swing-Arm Half-Motor Drive Unit?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The swing-arm half-motor drive unit is the core traction component of a monorail transport locomotive. It converts hydraulic power from the locomotive&#8217;s hydraulic system into rotational torque, driving the friction wheel along the monorail rail to propel the locomotive and its payload.<\/p>\n\n\n\n<p>Key design principles of the swing-arm half-motor drive unit include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Modular construction<\/strong>\u00a0\u2014 simplified installation, replacement, and field maintenance<\/li>\n\n\n\n<li><strong>Direct drive (no reduction gearing)<\/strong>\u00a0\u2014 eliminates mechanical power loss through intermediate reduction stages, improving overall locomotive travel efficiency<\/li>\n\n\n\n<li><strong>Rotating swing-arm bracket structure<\/strong>\u00a0\u2014 allows the drive unit to self-adjust according to gradient conditions, maintaining consistent friction wheel contact pressure on the rail<\/li>\n\n\n\n<li><strong>Imported radial piston hydraulic motor<\/strong>\u00a0\u2014 German or British OEM motors as standard, ensuring reliability in demanding underground environments<\/li>\n<\/ul>\n\n\n\n\n<p>According to international underground mine transport standards, drive unit reliability and braking performance are among the most critical safety parameters for monorail transport locomotives operating on gradients. The swing-arm half-motor drive unit is engineered to meet these requirements across a full range of operating conditions.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1836\" height=\"928\" src=\"https:\/\/relystone.com\/wp-content\/uploads\/2026\/04\/swing-arm-half-motor-drive-unit-monorail-transport-locomotive-underground-coal-mine.bmp\" alt=\"swing-arm half-motor drive unit monorail transport locomotive underground coal mine\" class=\"wp-image-992\" srcset=\"https:\/\/relystone.com\/wp-content\/uploads\/2026\/04\/swing-arm-half-motor-drive-unit-monorail-transport-locomotive-underground-coal-mine.bmp 1836w, https:\/\/relystone.com\/wp-content\/uploads\/2026\/04\/swing-arm-half-motor-drive-unit-monorail-transport-locomotive-underground-coal-mine-768x388.jpg 768w, https:\/\/relystone.com\/wp-content\/uploads\/2026\/04\/swing-arm-half-motor-drive-unit-monorail-transport-locomotive-underground-coal-mine-1536x776.jpg 1536w, https:\/\/relystone.com\/wp-content\/uploads\/2026\/04\/swing-arm-half-motor-drive-unit-monorail-transport-locomotive-underground-coal-mine-18x9.jpg 18w, https:\/\/relystone.com\/wp-content\/uploads\/2026\/04\/swing-arm-half-motor-drive-unit-monorail-transport-locomotive-underground-coal-mine-600x303.jpg 600w\" sizes=\"auto, (max-width: 1836px) 100vw, 1836px\" \/><figcaption class=\"wp-element-caption\">Swing-arm half-motor drive unit (DC03-03B) \u2014 Relystone monorail transport locomotive<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drive_Unit_Structure_and_Key_Components\"><\/span>Drive Unit Structure and Key Components<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The swing-arm half-motor drive unit consists of the following core assemblies:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Drive_Bracket_Swing-Arm_Frame\"><\/span>1. Drive Bracket (Swing-Arm Frame)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The rotating swing-arm bracket allows the entire drive assembly to pivot in response to gradient changes, ensuring the friction wheel maintains consistent contact force against the monorail rail surface across flat, inclined, and curved roadway sections.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Radial_Piston_Hydraulic_Motor\"><\/span>2. Radial Piston Hydraulic Motor<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The hydraulic motor is a radial piston design sourced from German or British OEM manufacturers. The motor connects to the friction wheel via an intermediate short shaft \u2014 a direct drive configuration that eliminates the need for a reduction gearbox, reducing mechanical complexity and power transmission losses.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Friction_Wheel\"><\/span>3. Friction Wheel<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The friction wheel is the primary contact element between the drive unit and the monorail rail. It is driven directly by the hydraulic motor via the intermediate short shaft. The friction wheel diameter is a critical maintenance parameter (see maintenance section below).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Dual_Brake_System\"><\/span>4. Dual Brake System<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The swing-arm half-motor drive unit is equipped with two independent brakes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Service brake<\/strong>\u00a0\u2014 for normal deceleration and controlled stops during operation<\/li>\n\n\n\n<li><strong>Safety brake<\/strong>\u00a0\u2014 emergency brake activated automatically under hydraulic pressure loss<\/li>\n<\/ul>\n\n\n\n<p>Each brake cylinder operates at a working pressure of 14\u201316 MPa. The braking force of a single brake is 1.5\u20132\u00d7 the rated traction force of the drive unit, providing a substantial safety margin against runaway on uphill and downhill gradients.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Braking_System_How_It_Works\"><\/span>Braking System: How It Works<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The braking system of the swing-arm half-motor drive unit is a&nbsp;<strong>fail-safe design<\/strong>&nbsp;\u2014 meaning the brakes engage automatically when hydraulic pressure is lost, rather than requiring active hydraulic pressure to hold the brakes on.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Normal_Operation\"><\/span>Normal Operation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>During normal locomotive operation, hydraulic pressure is applied to the brake cylinders, compressing the brake springs and releasing the brake pads from the rail web. The hydraulic motor drives the friction wheel, and the locomotive travels freely along the monorail.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Emergency_Braking\"><\/span>Emergency Braking<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>When hydraulic pressure is released (either by operator command or system failure), the brake springs automatically clamp the brake pads against the rail web, bringing the locomotive to a controlled stop. This fail-safe mechanism is critical for preventing runaway accidents in two scenarios common in underground coal mines:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Uphill rollback<\/strong>\u00a0\u2014 locomotive loses traction and begins sliding back down the gradient<\/li>\n\n\n\n<li><strong>Downhill runaway<\/strong>\u00a0\u2014 locomotive accelerates beyond controlled speed on a descent<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Braking_Performance_Standards\"><\/span>Braking Performance Standards<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>At maximum load, maximum gradient, and maximum design speed (downhill): braking distance does not exceed the distance traveled in 6 seconds at that speed, in line with <a href=\"https:\/\/www.ilo.org\/safework\/areasofwork\/mining\/lang--en\/index.htm\" target=\"_blank\" rel=\"noopener\">ILO underground mine transport safety standards<\/a><\/li>\n\n\n\n<li>At minimum load, maximum gradient (uphill): braking deceleration does not exceed 5 m\/s\u00b2<\/li>\n\n\n\n<li>Hydraulic cylinder working pressure is adjustable to suit specific mine operating conditions<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Technical_Specifications_%E2%80%94_DC03-03B\"><\/span>Technical Specifications \u2014 DC03-03B<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Unit<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Model<\/td><td>\u2014<\/td><td>DC03-03B<\/td><\/tr><tr><td>Brake Pressure<\/td><td>MPa<\/td><td>14\u201316<\/td><\/tr><tr><td>Clamping Pressure<\/td><td>MPa<\/td><td>8\u201312<\/td><\/tr><tr><td>Rated Traction Force<\/td><td>kN<\/td><td>30<\/td><\/tr><tr><td>Max Operating Speed (horizontal)<\/td><td>m\/s<\/td><td>2.2<\/td><\/tr><tr><td>Min Turning Radius \u2014 Horizontal<\/td><td>m<\/td><td>4<\/td><\/tr><tr><td>Min Turning Radius \u2014 Vertical<\/td><td>m<\/td><td>8<\/td><\/tr><tr><td>Max Gradient<\/td><td>\u00b0<\/td><td>\u226425\u00b0<\/td><\/tr><tr><td>Drive Unit Weight<\/td><td>kg<\/td><td>590<\/td><\/tr><tr><td>Dimensions (L \u00d7 W \u00d7 H)<\/td><td>mm<\/td><td>1030 \u00d7 720 \u00d7 520<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Maintenance_and_Inspection_Guide\"><\/span>Maintenance and Inspection Guide<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Regular inspection and maintenance of the swing-arm half-motor drive unit is essential for safe and efficient monorail transport locomotive operation. The following checks should be performed at scheduled maintenance intervals.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"51_Routine_Inspection_Checklist\"><\/span>5.1 Routine Inspection Checklist<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Clamping_Cylinders\"><\/span>Clamping Cylinders<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Inspect all clamping cylinders for hydraulic oil leaks. Any leakage from cylinder seals or fittings must be rectified before returning the locomotive to service.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Friction_Wheel_Hub_Bolts\"><\/span>Friction Wheel Hub Bolts<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Check friction wheel hub bolts for loosening. Required tightening torque:&nbsp;<strong>145 Nm<\/strong>. Bolts found below this torque must be retorqued immediately.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Load_Wheel_Bolt_Axles\"><\/span>Load Wheel Bolt Axles<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Verify load wheel bolt axle tightening torque. Required torque:&nbsp;<strong>400\u2013450 Nm<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Brake_Pads_%E2%80%94_Wear_Limit\"><\/span>Brake Pads \u2014 Wear Limit<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Inspect brake pad thickness. When the pad dimension wears from&nbsp;<strong>22 mm down to 17 mm<\/strong>, the brake pads must be replaced immediately. Operating with worn brake pads below this limit compromises braking force and is a safety violation.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Friction_Wheel_%E2%80%94_Wear_Damage_Inspection\"><\/span>Friction Wheel \u2014 Wear &amp; Damage Inspection<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Inspect friction wheel diameter and surface condition at each maintenance interval:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Diameter wear limit<\/strong>: Replace when diameter wears from \u03c6340 mm to \u03c6320 mm<\/li>\n\n\n\n<li><strong>Surface condition<\/strong>: Replace immediately if cracking, deformation, or rubber debonding is detected<\/li>\n\n\n\n<li><strong>Replacement rule<\/strong>: Friction wheels must always be replaced in pairs<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"52_Lubrication_Requirements\"><\/span>5.2 Lubrication Requirements<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>All moving points on the swing-arm half-motor drive unit must be lubricated with approved lubricating oil at regular intervals. Refer to the lubrication schedule specific to your mine&#8217;s operating hours and gradient conditions. Inadequate lubrication is a leading cause of premature wear in drive unit components.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_rail_systems_is_the_swing-arm_half-motor_drive_unit_compatible_with\"><\/span>What rail systems is the swing-arm half-motor drive unit compatible with?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The swing-arm half-motor drive unit (DC03-03B) is designed for monorail transport locomotives operating on I140E and I140V rail systems, which are standard specifications for underground coal mine monorail haulage in China and export markets.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_use_a_direct-drive_radial_piston_motor_instead_of_a_gearbox-driven_system\"><\/span>Why use a direct-drive radial piston motor instead of a gearbox-driven system?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Direct drive eliminates mechanical power loss through reduction gearing, improving locomotive travel efficiency. It also reduces the number of mechanical components, lowering maintenance requirements and failure points in underground environments where service access is limited.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_happens_if_the_hydraulic_system_fails_while_the_locomotive_is_on_a_gradient\"><\/span>What happens if the hydraulic system fails while the locomotive is on a gradient?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The fail-safe brake design means that any loss of hydraulic pressure \u2014 whether intentional or due to system failure \u2014 automatically engages the brake springs, clamping the brake pads against the rail web and bringing the locomotive to a stop. This prevents both uphill rollback and downhill runaway scenarios.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Can_the_braking_pressure_be_adjusted_for_different_mine_conditions\"><\/span>Can the braking pressure be adjusted for different mine conditions?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Yes. The hydraulic cylinder working pressure is adjustable to suit specific locomotive application conditions, including variations in gradient, payload weight, and roadway surface characteristics.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_often_should_brake_pads_be_inspected\"><\/span>How often should brake pads be inspected?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Brake pad inspection should be included in every scheduled maintenance cycle. The wear limit (22 mm \u2192 17 mm) must be checked regularly, with replacement frequency depending on operating hours, gradient severity, and braking frequency of the specific locomotive deployment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Custom_Monorail_Transport_Locomotive_Drive_Units_%E2%80%94_Get_a_Quote\"><\/span>Custom Monorail Transport Locomotive Drive Units \u2014 Get a Quote<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Relystone manufactures and exports complete monorail transport locomotive systems and drive unit components to coal mines across 30+ countries, including Australia, Vietnam, Czech Republic, and throughout Central Asia and the Middle East. Every drive configuration is engineered to your mine&#8217;s specific gradient, payload, and roadway conditions.<\/p>\n\n\n\n<p><a href=\"https:\/\/relystone.com\/contact-us\/\"><strong>Contact Relystone for a 1-on-1 technical consultation and project-specific quote \u2192<\/strong><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>The&nbsp;swing-arm half-motor drive unit&nbsp;is a compact, modular traction device designed for monorail transport locomotives operating on I140E\/I140V rail systems in underground coal mines. Built to adapt to varying gradient conditions, the swing-arm half-motor drive unit features a dual-brake system, fail-safe hydraulic braking, and a direct-drive radial piston motor \u2014 making it one of the most reliable and low-maintenance drive solutions available for underground monorail haulage applications. What Is a Swing-Arm Half-Motor Drive Unit? The swing-arm half-motor drive unit is the core traction component of a monorail transport locomotive. It converts hydraulic power from the locomotive&#8217;s hydraulic system into rotational torque, driving the friction wheel along the monorail rail to propel [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":993,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[25],"tags":[],"class_list":["post-991","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-analysis"],"acf":[],"_links":{"self":[{"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/posts\/991","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/comments?post=991"}],"version-history":[{"count":2,"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/posts\/991\/revisions"}],"predecessor-version":[{"id":995,"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/posts\/991\/revisions\/995"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/media\/993"}],"wp:attachment":[{"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/media?parent=991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/categories?post=991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/relystone.com\/ja\/wp-json\/wp\/v2\/tags?post=991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}