LiuGong CLG922E Excavator Service Manual 201503001 – Cummins QSB6.7 Workshop Repair Guide

Description

LiuGong CLG922E Excavator Service Manual — Complete Workshop Coverage

This LiuGong CLG922E Excavator Service Manual (document 201503001) is the complete technical workshop guide for the CLG922E model equipped with the Cummins QSB6.7 diesel engine. Spanning 981 pages, this service manual gives technicians, fleet maintenance crews, and heavy equipment mechanics the full scope of procedures, specifications, and diagnostic information needed to service, troubleshoot, and overhaul the machine. From routine maintenance intervals to complete component disassembly, the manual is structured to support both the technical guide reference and the workshop guide execution.

File Details

• Manual Type: Service Manual / Workshop Repair Guide
• Brand: LiuGong
• Model: CLG922E
• Applicable Engine: Cummins QSB6.7
• Document Number: 201503001
• Version/Revision: CLG922EIII, March 20, 2015
• Language: English
• Page Count: 981
• 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
  • Prevention of injury by thunder, cab protector, inner space of cab, precautions for accessories
  • Lifting and matching operations, mobile crane, bridge crane, selection of rope
• 2. Foreword
  • How to read the manual, composition of service manual, other reference manuals, user’s guidance
  • Marking of revised version, standard of general torque, unit conversion table
  • Cable identification methods, wire number, wire categories, color abbreviation code, wire specification
  • Coating materials, weight table, oils use specifications
• 3. Structural Function and Maintenance
  • Power system: diesel engine related parts, water radiator, hydraulic oil cooler, intercooler, fuel cooler
  • Undercarriage system: track frame, tensioner, idler, carrier roller, track roller, sprocket, track
  • Hydraulic system: layout, main pump, main control valve, center connector, explosion-proof valve, hand pilot valve, foot pilot valve, cushion valve, octuple solenoid valve, travel motor & reduction gear, swing motor & reduction gear, cylinder, hydraulic oil tank
  • Hydraulic working principle: main hydraulic circuit, pilot circuit, negative flow control, boom/arm/bucket/swing/travel circuits
  • Work implement: component sizes, arm part, bucket part
  • Air conditioning system: layout of A/C pipeline
  • Electrical system: engine control, display system, LCD, key panel, software, user mode, electrical control system, work modes, auto idling, power boosting, overheating protection, travel speed control, descriptions of partial circuits
• 4. Parameters
  • Basic parameters: main technical parameters, dimension drawing, complete vehicle parameters, components parameters, scope of work
  • Performance parameters of diesel engine
  • Performance parameters of complete machine
• 5. Testing and Adjusting
  • Performance test of complete machine: diesel engine speed, travel speed, running speed, travel deflection, swing parking brake angle, revolving speed, swing bearing clearance, cylinder action time, cylinder settlement, control lever operating force/stroke, boom lifting and swing action, pilot pressure, secondary pilot pressure, solenoid proportional valve output pressure, main relief valve setting pressure
  • Other tests: valve clearance adjustment, crankcase blow-by measurement, oil pressure measurement, track tension measurement and adjustment, negative flow pressure N1/N2 inspection and adjustment, release of remaining pressure, exhaust of various devices, diode inspection, compressor belt tensioner adjustment, travel motor and reduction gear performance test
• 6. Fault Diagnosis
  • Precautions for fault diagnosis, basic fault detection before maintenance
  • Classification of faults: DTC, electrical system faults, hydraulic and mechanical system faults
  • DTC codes: battery voltage, charging system, engine oil pressure, pilot pressure switches, air filter, engine speed, coolant temperature, hydraulic oil temperature, fuel level, water-in-fuel, sensor power, pump proportional solenoid valve, attachment confluent solenoid valve, travel speed solenoid, flattening solenoid valve, digging solenoid valve, flow adjusting solenoid valves, power boosting solenoid valve, travel lifting solenoid valve, battery relay, auto preheating relay, start cut-off relay, travel alarm, pump pressure sensors, negative flow pressure sensors, pump pressure-reducing valve sensor, actuator feedback, controller heartbeat, CAN bus communication, accelerator knob, fuel pump relay, GPS/GSM/GPRS faults, fan reversing/drive solenoid valves
  • Electrical system fault diagnosis: battery undervoltage, abnormal battery, automatic slowdown failed, engine start fault, engine shutdown during operation, engine non-shutdown, preheater fault, all implements/revolving/travel unable to move, display screen showing nothing, incorrect hydraulic oil temperature display, fuel gauge unable to display correct value, windshield wiper unable to work, A/C panel unable to display, no wind or abnormal air volume, poor A/C refrigeration, A/C alarm codes, travel alarm unable to sound
  • Hydraulic and mechanical system fault diagnosis: excessive braking angle for slewing stop, abnormal noise of pump mounting position, no responses for all operations, hydraulic oil emulsification, abnormal hydraulic oil temperature rise, slewing abnormally, no response for slewing single direction, rotation unable to stop, fail to actuate unilateral travel mechanism, travel deviation, slow speed of boom/arm/bucket, weak actions of boom/arm/bucket, significantly reduced engine speed or engine stalling
• 7. Removal and Installation
  • Overview
  • Power system: diesel engine as, hydraulic oil cooler, intercooler, water radiator, fuel tank as, injector, engine front seal, engine rear seal, cylinder head as, fuel cooler
  • Undercarriage system: track roller, carrier roller, track as, sprocket, idler as and tensioner as, revolving frame, swing bearing
  • Covering parts: engine hood, counterweight
  • Hydraulic system: center connector as, hydraulic oil tank, main control valve as, main pump as, foot pilot valve as, hand pilot valve as, travel motor & reduction gear, swing motor & reduction gear
  • Work implement: bucket, link and lever, arm, boom, work implement assembly, bucket cylinder as, arm cylinder as, boom cylinder as, cylinder disassembly and assembly
  • Air conditioning system: A/C compressor as, A/C evaporator as
  • Cab: removal and installation, floor plate as

This service manual is organized into two major functional guides. The technical guide covers safety, foreword, structural function and maintenance standards, testing and adjusting, and fault diagnosis. The workshop guide covers disassembly and assembly plus schematic diagrams for the electrical system, air conditioning system, and hydraulic system. Together they give a technician the complete path from understanding how the machine is built, to testing whether it performs to specification, to diagnosing what has failed, and finally to removing, repairing, and reinstalling components correctly.

What This Manual Enables You to Do

With this LiuGong CLG922E service manual, you can perform the full range of professional service tasks on the machine. The fault diagnosis chapter alone covers over 100 DTC codes with step-by-step test procedures, wiring references, and component locations. The hydraulic system section breaks down the main pump, main control valve, travel and swing motors, pilot valves, and cylinders with both working principles and maintenance standards. The electrical system section provides display diagnostics, controller pinouts, sensor specifications, and circuit descriptions. The removal and installation chapter gives the exact sequences and torque values needed to safely take apart and reassemble major assemblies including the engine, hydraulic pump, control valve, travel and swing motors, undercarriage components, work implement, and cab.

Why This Manual Matters for CLG922E Owners and Technicians

The CLG922E is a 22-ton-class excavator built around the Cummins QSB6.7 engine and a sophisticated hydraulic system with negative flow control, multiple work modes, and electronic control of pump displacement. Servicing it correctly requires more than general heavy equipment knowledge — it requires the manufacturer’s procedures, the exact torque values, the specific pressure settings, the sensor resistance tables, and the DTC flowcharts. Without these, a technician risks incorrect adjustment, repeat failures, damaged components, or unsafe operating conditions. This manual supplies all of those details in one organized document, so every repair and adjustment is performed to LiuGong’s specification.

Delivery

This LiuGong CLG922E Excavator Service Manual is delivered as an instant PDF download after payment. There is no shipping, no waiting for a physical book, and no risk of a lost or damaged copy. You can access it on any device that reads PDF files — laptop, desktop, tablet, or smartphone — and print the pages you need for the workshop floor. Whether you are diagnosing an electrical fault in the cab, setting main relief valve pressure, rebuilding a travel motor, or adjusting track tension, the information is immediately available and printable for hands-on use.