Sumitomo SH75X-3B Hydraulic Excavator Repair Service Manual

Sumitomo Excavator SH75X-3B Format: PDF Manual Identification: WLSM0753B-00W, WDL0754-0T and WLST0753B-00W English Sumitomo SH75X-3B Hydraulic Excavator Repair Service Manual – 448 Pages & 216 Pages Operators Manual – 190 Pages Description Sumitomo SH75X-3B Hydraulic Excavator Repair Service Manual Sumitomo Excavator SH75X-3B Format: PDF Manual Identification: WLSM0753B-00W, WDL0754-0T and WLST0753B-00W English Sumitomo SH75X-3B Hydraulic Excavator Repair Service Manual – 448 Pages & 216 Pages Operators Manual – 190 Pages Sumitomo SH75X-3B Manual TABLE OF CONTENTS Safety Introduction Using Technical Information Precautions for Use Tightening Torque Specifications Performances Disassembling and Maintenance Instructions for Major Hydraulic Components Hydraulic Pump Assembly and Disassembly Procedures …………………………………………………………..1 1. Tools and Jigs………………………………………………………………………………………1 2. Cautions ……………………………………………………………………………………………..1 3. Disassembly Procedures……………………………………………………………………….2 4. Assembly Procedures……………………………………………………………………………8 5. Disassembly of Gear Pump………………………………………………………………….14 6. Assembly of Gear Pump………………………………………………………………………17 Internal structure diagram……………………………………………………………………………..23 Travel Unit Maintenance Procedures………………………………………………………………………………28 1. Tools …………………………………………………………………………………………………28 2. Tightening Torque……………………………………………………………………………….32 3. Weight Table………………………………………………………………………………………32 Disassembly ……………………………………………………………………………………………….33 1. Preparations ………………………………………………………………………………………33 2. General Work Precautions …………………………………………………………………..33 3. Disassembly Procedure……………………………………………………………………….34 Maintenance Standards………………………………………………………………………………..52 1. Seals ………………………………………………………………………………………………..52 2. Maintenance Standards for Worn Parts …………………………………………………52 Assembly ……………………………………………………………………………………………………54 1. Preparations ………………………………………………………………………………………54 2. General Work Precautions …………………………………………………………………..54 3. Assembly Procedures………………………………………………………………………….54 Performance Confirmation Test ……………………………………………………………………..72 3-Dimensional Disassembly Diagram of Reduction Gear Section……………………….73 3-Dimensional Disassembly Diagram of Hydraulic Motor Section……………………….74 Travel Motor ………………………………………………………………………………………………..75 Swing Unit Maintenance Procedures………………………………………………………………………………77 1. Trouble and Countermeasures ……………………………………………………………..77 2. Tool …………………………………………………………………………………………………..84 3. Disassembly Procedures……………………………………………………………………..87 4. Assembly Procedures………………………………………………………………………….97 5. Quality Check after Assembly …………………………………………………………….108 6. Maintenance Standards …………………………………………………………………….109 7. Development Diagram……………………………………………………………………….112 8. Configuration Diagram……………………………………………………………………….114 Reverse Prevention Valve……………………………………………………………………………117 1. Trouble and Countermeasures ……………………………………………………………117 2. Tools for Assembly and Disassembly …………………………………………………..118 Reverse Prevention Valve Breakdown Diagram ……………………………………………..122 Control Valve Disassembly ……………………………………………………………………………………………..123 1. Cautions for Disassembly…………………………………………………………………..123 2. Disassembly Procedures……………………………………………………………………123 Cleaning …………………………………………………………………………………………………..127 Inspection …………………………………………………………………………………………………127 Assembly ………………………………………………………………………………………………….128 1. Sub Assembly…………………………………………………………………………………..128 2. Assembly of Control Valve Main Unit …………………………………………………..129 Relief Valve……………………………………………………………………………………………….133 1. Procedures for Assembly and Disassembly of Main Relief Valve …………….133 2. Procedures for Assembly and Disassembly of Overload Relief Valve……….134 3. Relief Valve Adjustment……………………………………………………………………..135 Installation ………………………………………………………………………………………………..136 Operation………………………………………………………………………………………………….136 Control Valve Specifications List…………………………………………………………………..136 Troubles and Countermeasures …………………………………………………………………..137 Control Valves Overall…………………………………………………………………………….137 Relief Valve …………………………………………………………………………………………..138 Hydraulic System Overall………………………………………………………………………..138 Part List ……………………………………………………………………………………………………139 Reference Diagram…………………………………………………………………………………….140 Cylinder Structural Diagram……………………………………………………………………………………..152 1. Boom Cylinder (mono-boom machine)…………………………………………………152 2. Boom Cylinder (offset-boom machine)…………………………………………………153 3. Arm Cylinder (mono-boom machine) …………………………………………………..154 4. Arm Cylinder (offset-boom machine)……………………………………………………155 5. Bucket Cylinder (mono-boom machine) ……………………………………………….156 6. Bucket Cylinder (offset-boom machine) ……………………………………………….157 7. Offset Cylinder (offset-boom machine)…………………………………………………158 8. Blade Cylinder (mono-boom/offset-boom machine)……………………………….159 Maintenance Procedures…………………………………………………………………………….160 1. Explanation of Functions ……………………………………………………………………160 2. Maintenance inspection and service ……………………………………………………163 3. Trouble diagnostics……………………………………………………………………………164 4. Storage standards …………………………………………………………………………….169 5. Assembly and disassembly procedures ……………………………………………….170 Specialty Tool and Jig for Repair ………………………………………………………………….186 1. Tool Dimensions ……………………………………………………………………………….186 2. Handling of Specialty Jigs for Cylinder Repair ………………………………………187 Remote Control Valve Safety Items………………………………………………………………………………………………208 1. Cautions Concerning Operator's Manual ……………………………………………..208 2. Safety Cautions ………………………………………………………………………………..208 3. Disclaimer………………………………………………………………………………………..209 For Operation…………………………………………………………………………………………….210 1. Summary …………………………………………………………………………………………210 2. Specifications …………………………………………………………………………………..210 3. Structure………………………………………………………………………………………….210 4. Function…………………………………………………………………………………………..210 5. Operation…………………………………………………………………………………………211 6. Maintenance Procedures …………………………………………………………………..213 7. Causes of Trouble and Countermeasures…………………………………………….224 8. Remote Control Valve Assembly Cross-Section Diagram……………………….225 9. Special Jig Assembly Cross-Section Diagram and Detailed Diagram……….226 For Travel Use……………………………………………………………………………………………227 1. Structure………………………………………………………………………………………….227 2. Operation Explanation……………………………………………………………………….228 3. Assembly and Disassembly………………………………………………………………..231 4. Troubles and Countermeasures ………………………………………………………….234 For Offset and Blade…………………………………………………………………………………..235 1. Operation Explanation……………………………………………………………………….235 2. Parts Maintenance and Replacement ………………………………………………….235 3. Causes of Trouble and Solutions…………………………………………………………236 4. Assembly and Disassembly Procedures ………………………………………………236 5. Structural Diagram…………………………………………………………………………….238 Solenoid Valve (3 stack) Assembly Diagram……………………………………………………………………………………..239 Operation Principle …………………………………………………………………………………….239 Maintenance ……………………………………………………………………………………………..240 1. Assembly and Disassembly Precautions………………………………………………240 2. Assembly and Disassembly of Electromagnetic Switchover Valve……………240 3. Maintenance Standards …………………………………………………………………….241 4. Troubleshooting ………………………………………………………………………………..241 Cautions for Safety…………………………………………………………………………………242 Cushion Valve Structure …………………………………………………………………………………………………..244 Operation Explanation ………………………………………………………………………………..245 Assembly and Disassembly…………………………………………………………………………247 General Precautions ………………………………………………………………………………247 Disassembly Procedure ………………………………………………………………………….247 Troubles and countermeasures ……………………………………………………………………248 The Sumitomo Manual Preface The purpose of this Sumitomo Excavator manual is to assist dealers and repair serviceman in efficient repair and maintenance of their machinery. Carrying out the procedures as detailed, together with the use of any special tools needed. Using the Sumitomo SH75X-3B Manual To make information easier to find, there is an index at the beginning of each section listing the various parts in that section. At the beginning of each part there is a table of contents which should also be used as a guide to locate information. To assist with locating information, each section of the manual is preceded by a contents page listing the repair operations, Each instruction within an operating has a sequence number. To complete the operation in the minimum time is possible follow the manual guideline and repair instructions. When parts have to be replaced in either the SH75X-3B Hydraulic Excavator , it is essential that only genuine Sumitomo parts should be used. Special attention should be paid to the following points concerning repairs and the fitting of replacement parts and accessories. Indexing For convenience the manual is divided into section and parts, each page bearing a section and part number. The sections are subdivided into numbered operation. This simplifies cross referencing and enable the subject to be found easily.