{"product_id":"hitachi-zw20-wheel-loader-service-repair-manual-workshop-guide","title":"Hitachi ZW20 Wheel Loader Service Repair Manual Workshop Guide","description":"Format : PDF\u003cbr\u003eSUPPLIED AS DOWNLOADABLE LINK\u003cbr\u003e\u003cbr\u003eService Repair Manual (Troubleshooting) : Vol. No.T4EJ-E-00 (264 Pages)\u003cbr\u003eWorkshop Manual : Vol. No.W4EJ-E-00 (220 Pages)\u003cbr\u003e\u003cbr\u003eDescription\u003cbr\u003eHitachi ZW20 Wheel Loader Service Manual\u003cbr\u003eThe manual is applicable for the Hitachi ZW20\u003cbr\u003eWheel Loader\u003cbr\u003eModel\u003cbr\u003eFormat: PDF\u003cbr\u003eLanguage: English\u003cbr\u003eService Manual consists of the following:\u003cbr\u003eFor Model ZW20 as mentioned above:\u003cbr\u003eService Manual (Troubleshooting) : Vol. No.T4EJ-E-00 (264 Pages)\u003cbr\u003eWorkshop Manual : Vol. No.W4EJ-E-00 (220 Pages)\u003cbr\u003eTable of Content of the Workshop Manual\u003cbr\u003eSECTION 1 GENERAL\u003cbr\u003eGroup 1 Precautions for Disassembling\u003cbr\u003eand Assembling\u003cbr\u003eGroup 2 Tightening\u003cbr\u003eGroup 3 Painting\u003cbr\u003eSECTION 2 BODY\u003cbr\u003eGroup 1 Control Valve\u003cbr\u003eGroup 2 Main Pump\u003cbr\u003eSECTION 3 TRAVEL SYSTEM\u003cbr\u003eGroup 1 Cab\u003cbr\u003eGroup 2 HST Pump\u003cbr\u003eGroup 3 HST Motor\u003cbr\u003eGroup 4 Reduction Gear\u003cbr\u003eGroup 5 Axle\u003cbr\u003eGroup 6 Master Cylinder\u003cbr\u003eGroup 7 Power Steering\u003cbr\u003eGroup 8 Steering Cylinder\u003cbr\u003eSECTION 4 FRONT ATTACHMENT\u003cbr\u003eGroup 1 Front Attachment\u003cbr\u003eGroup 2 Cylinder\u003cbr\u003eTable of Content of the Technical Manual\u003cbr\u003eSECTION 1 GENERAL\u003cbr\u003eGroup 1 Specification\u003cbr\u003eGroup 2 Component Specifications\u003cbr\u003eGroup 3 Component Layout\u003cbr\u003eSECTION 2 SYSTEM\u003cbr\u003eGroup 1 Fuel System\u003cbr\u003eGroup 2 Hydraulic System\u003cbr\u003eGroup 3 Electrical System\u003cbr\u003eSECTION 3 COMPONENT OPERATION\u003cbr\u003eGroup 1 HST Pump\u003cbr\u003eGroup 2 HST Motor\u003cbr\u003eGroup 3 Axle\u003cbr\u003eGroup 4 Brake\u003cbr\u003eGroup 5 Orbitroll\u003cbr\u003eGroup 6 Control Valve\u003cbr\u003eGroup 7 Main Pump\u003cbr\u003eSECTION 4 OPERATIONAL PERFORMANCE TEST\u003cbr\u003eGroup 1 Introduction\u003cbr\u003eGroup 2 Standard\u003cbr\u003eGroup 3 Engine Test\u003cbr\u003eGroup 4 Wheel Loader Test\u003cbr\u003eSECTION 5 TROUBLESHOOTING\u003cbr\u003eGroup 1 Diagnosing Procedure\u003cbr\u003eGroup 2 Failure List\u003cbr\u003eGroup 3 Engine\u003cbr\u003eGroup 4 Component Layout\u003cbr\u003eManual guide composition\u003cbr\u003eHitachi ZAXIS ZW20 service manual consists of the Troubleshooting and the Workshop Manual.\u003cbr\u003eInformation included in the Service Manual: Technical information needed for redelivery and delivery, operation and activation of all devices and systems, operational performance tests, and troubleshooting procedures.\u003cbr\u003eInformation included in the Workshop Manual: Technical information needed for maintenance and repair of the machine, tools and devices needed for maintenance and repair, maintenance standards, and removal \/ installation and assemble \/ disassemble procedures.\u003cbr\u003eDA Valve\u003cbr\u003eThe gear pump is coaxially connected to HST pump for the charge and pilot.\u003cbr\u003eThe gear pump flow rate is changed in proportion to the engine speed.\u003cbr\u003eAll of flow rate flows to the charge circuit through the orifice of DA valve.\u003cbr\u003eDA valve decreases charge pressure to generate control pressure by using the signal based on the pressure difference caused by the flow rate change between the front and rear of orifice.\u003cbr\u003eTherefore, the pump displacement angle is controlled by pressure almost in proportion to the engine speed.\u003cbr\u003eThe charging pump delivery flow rate in proportion to the engine speed flows to charging circuit [C] through port [A].\u003cbr\u003eDA valve decreases charging circuit [C] pressure to generate control pressure in control circuit [B] by using the signals based on the spring force by spring (4) and the pressure difference caused by the flow rate change between the front and rear of orifice (6).\u003cbr\u003e1 – Control Cartridge\u003cbr\u003e2 – O-Ring\u003cbr\u003e3 – Set Screw\u003cbr\u003e4 – Adjust Spring\u003cbr\u003e5 – Differential Piston\u003cbr\u003e6 – Orifice\u003cbr\u003eA- DA Valve Primary side (From Charging Pump) B- DA Valve Secondary side (To Control Circuit) C- DA Valve Secondary side (To Charging Circuit) D- DA Valve Drain","brand":"Uploader","offers":[{"title":"Default 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