LiuGong CLG920E CLG922E Hydraulic Excavator Service Manual 2017

LiuGong CLG920E & CLG922E Hydraulic Excavator Service Manual

This LiuGong CLG920E CLG922E Hydraulic Excavator Service Manual is the complete 1,183-page workshop reference released by LiuGong under document number 201709001, dated October 16, 2017. It covers the CLG920E and CLG922E hydraulic excavators fitted with the Cummins QSB7 diesel in China II/EU Stage II and China III/EU Stage IIIA configurations. Everything a technician needs — safety, structural function and maintenance standards, testing and adjustment, fault diagnosis, removal and installation, and the full hydraulic and electrical schematic set — is brought together inside this single LiuGong CLG920E CLG922E service manual PDF.

File Details

• Manual type: Service Manual (technical guide plus workshop guide)
• Brand: LiuGong
• Models covered: CLG920E, CLG922E hydraulic excavators
• Engines: Cummins QSB7 (China II/EU Stage II), Cummins QSB7 (China III/EU Stage IIIA)
• Document number: 201709001
• Date: October 16, 2017
• Language: English
• Page count: 1,183
• File format: PDF

Chapters Covered

• 1 Safety — safety precautions, compressed air, high-pressure solution, safe disposal of waste liquid, accumulator precautions, asbestos, prevention of extruding or cutting off, burns, coolant, oil, battery, fire and explosion protection, diethyl ether, piping/pipe and hose, fire extinguisher and first-aid kit, lightning, cab protector, cab inner space, accessories, mobile crane and bridge crane operation, rope selection
• 2 Foreword — how to read the manual, marking of revised version, standard of general torque, unit conversion table, cable identification methods, coating materials, weight table, oils use specifications
• 3 Structural function and maintenance — power system, undercarriage system, hydraulic system, work implement, air conditioning system, electrical system
• 4 Parameters — basic parameters, performance parameters of the diesel engine, performance parameters of the complete machine
• 5 Test and Adjustment — complete machine performance test, diesel engine speed, travel speed, running speed, travel deviation, swing service brake angle, swing speed, swing bearing clearance, cylinder action time, cylinder settlement, control lever operating force, control lever stroke, boom lifting and swing action, pilot pressure, secondary pilot pressure, solenoid proportional valve output pressure, main relief valve setting pressure, valve lash adjustment, crankcase blow-by, oil pressure measurement, track tension, negative flow pressures N1 and N2, residual pressure release, exhaust of devices, diode check, compressor belt tensioner, travel motor performance test
• 6 Fault diagnosis — precautions, basic fault detection before maintenance, classification of faults, the full DTC list, electrical system fault diagnosis, hydraulic and mechanical system fault diagnosis
• 7 Removal and Installation — power system, track travel system, covering parts, hydraulic system, work implement, A/C system, cab
• 8 Attached Drawing — hydraulic schematic diagram, electric schematic diagram, A/C electrical schematic diagram

IMAGES PREVIEW

The document splits into a technical guide (safety, foreword, structure function and maintenance standards, testing and adjusting, fault diagnosis) and a workshop guide (disassembly and assembly plus the schematic diagrams of the electrical, air conditioning and hydraulic systems). That two-part layout lets a technician move between the theory behind a circuit and the step-by-step teardown of the same component without leaving the file.

What Each Chapter Delivers

Safety and Foreword

Opening chapters establish the working rules before any tool is picked up — handling high-pressure hydraulic oil, accumulator nitrogen, asbestos, battery electrolyte, hot coolant and oil, plus crane and lifting safety. The foreword supplies the general torque table, unit conversion chart, cable identification method, coating and sealant list, weight table of major components, and the oil specifications and change intervals used throughout the rest of the book.

Structural Function and Maintenance

This chapter walks the machine system by system. The power system section covers the diesel engine related parts and the water radiator, hydraulic oil cooler, intercooler and fuel cooler. The undercarriage section details the track frame and tensioner, idler, carrier roller, track roller, sprocket, track and swing bearing with wear limits and repair-or-replace criteria. The hydraulic system section is the largest part of the CLG920E CLG922E service manual, covering the main pump, main control valve, center connector, explosion-proof valve, hand and foot pilot valves, cushion valve, octuple solenoid valve, travel motor and reduction gear, swing motor and reduction gear, cylinders, hydraulic oil tank and the complete hydraulic working principle for boom, arm, bucket, swing and travel circuits. Work implement, A/C system and electrical system sections complete the chapter.

Parameters and Test and Adjustment

The parameters chapter lists basic dimensions, diesel engine performance data and complete machine performance standards for both CLG920E and CLG922E. The test and adjustment chapter provides the measured procedures with tools, machine status and acceptable values — engine speed, travel speed, travel deviation, swing brake angle and speed, swing bearing clearance, cylinder action times, cylinder settlement, lever forces and strokes, pilot pressures, secondary pilot pressures, relief valve setting pressures, valve lash, crankcase blow-by, oil pressure, track tension and the negative flow feedback pressures N1 and N2.

Fault Diagnosis

The fault diagnosis chapter is built around the machine’s DTC list, with entry after entry giving the system description, consequences, component location, and a numbered step-by-step troubleshooting path using a multimeter. Electrical system faults (E1 through E23) cover battery problems, auto slowdown, engine start and shutdown faults, display and gauge issues, wiper, alarm and air conditioning alarms. Hydraulic and mechanical faults (H1 through H13) walk through slewing brake angle, pump noise, unresponsive operations, oil emulsification, oil temperature rise, swing and travel faults, slow or weak work implement action and engine stall.

Removal and Installation

The removal and installation chapter provides the exact teardown and reassembly sequence for the diesel engine, hydraulic oil cooler, intercooler, water radiator, fuel tank, injector, engine seals, cylinder head, fuel cooler, track system components, revolving frame, swing bearing, engine hood, counterweight, center connector, hydraulic oil tank, main control valve, main pump, travel pilot valve, hand pilot valve, travel and swing motor assemblies, bucket, link and lever, arm, boom, work implement assembly, the three cylinders and cylinder internals, A/C compressor and evaporator, and the cab and floor frame. Tightening torques, thread locker notes and lifting weights are stated at the relevant steps.

Fault Code Coverage

Over one hundred DTC entries are documented, including 101001 extremely low battery voltage, 101003 high battery voltage, 101017 low battery voltage, 111001 system charging fault, 121015 oil pressure switch disconnected, 121018 low oil pressure, 121305 handle pressure switch OFF, 121405 pedal pressure switch disconnected, 121604 air filter switch shorted to ground, 121615 air filter clogging, 131000 high engine speed, 131005 engine speed sensor fault, the coolant and hydraulic oil temperature codes, 131303/131304/131317 fuel level codes, 131603 through 131615 water-in-fuel codes, 131703/131704 sensor power faults, 141005 through 141105 pump proportional solenoid valve codes, the 151xxx attachment, travel, flattening, trenching, flow adjusting and power boosting solenoid valve codes, 171004 through 171205 battery and preheating relay codes, 201004 travel alarm, 211003 through 211403 pressure sensor codes, 221xxx actuator codes, 231012/231014 controller and CAN bus codes, 241014 accelerator knob, 251004/251005 fuel pump relay codes, 261xxx GPS, GSM, GPRS and SIM codes, and 271304 through 271506 fan reversing and fan drive solenoid valve codes.

Hydraulic and Electrical Schematics

The attached drawing chapter closes the LiuGong CLG920E CLG922E hydraulic excavator service manual with the full hydraulic schematic diagram, the electric schematic diagram and the A/C electrical schematic diagram. These fold-out style schematics let a technician trace a circuit or oil path from the pump to the actuator or from the battery to a sensor without needing a separate drawing set.

Who This Manual Is For

This LiuGong CLG920E CLG922E service manual is written for the trained technician, the workshop supervisor and the owner-operator who wants factory-level procedures rather than guesswork. Because it includes the standard torque table, oil specifications, wear limits, service data, fault code flowcharts, and the schematic diagrams all in one document, it works as both a repair guide and a reference book that can be kept open on the bench through a full teardown.

Get the LiuGong CLG920E CLG922E Service Manual

With this LiuGong CLG920E CLG922E Hydraulic Excavator Service Manual you can diagnose a fault code with the correct test points, set a relief valve to the right pressure, rebuild a travel or swing motor, reseal a cylinder, adjust track tension, or pull and reinstall the main pump — following LiuGong procedures and values rather than approximations. Getting the procedures and specifications right the first time protects the machine, avoids repeat labour and prevents damage caused by incorrect torque or clearance. The file is delivered as an instant PDF download with no shipping, ready to open on a laptop, tablet or phone and to print pages for the workshop floor.