This comprehensive workshop service repair manual provides detailed information for the Hyundai HL770-9 and HL770XTD-9 backhoe loaders. It includes a wealth of technical data, repair procedures, and troubleshooting guides to help you diagnose and resolve issues with your machine. The manual covers all aspects of the backhoe loader, including the engine, transmission, hydraulics, electrical systems, and more.

You will find detailed instructions and diagrams for essential tasks such as periodic maintenance, component removal and installation, troubleshooting, and repair. The manual also includes a lubrication chart, tightening torque specifications, and electrical wiring diagrams to assist you in your repair work.

The manual features a separate section devoted to the 8.9L 6-cylinder inline QSL9 diesel engine, providing detailed information on its operation, maintenance, and repair. With its detailed, step-by-step instructions and clear illustrations, this manual is an invaluable resource for both experienced mechanics and DIY enthusiasts who want to maintain and repair their Hyundai HL770-9 and HL770XTD-9 backhoe loaders.

This manual also includes:

* General information and precautions
* Specifications
* Special tools
* Engine remove/install system
* Turbocharger system
* Air induction system
* Exhaust system
* Engine electrical system
* Fuel injection system
* Engine fuel system
* Engine cooling system
* Intake manifold system
* Air intake system
* Lubrication system
* Power train system
* Transmission system
* Electro-hydraulic shift control
* Electric control unit
* Differential system
* Tire and wheel system
* Wheel drive & front axle
* Rear axle-final drive
* Clutch-drive shaft
* Hydraulic brake system
* Parking brake system
* Brake valve & bleeding
* Steering system
* Priority valve system
* Brake master cylinder
* Bearing housing system
* Hydraulic system
* Loader main control valve
* Hydraulic main pump
* Boom section operation
* Pilot control valve
* Bucket section operation
* Main relief valve system
* Auxiliary section operation
* Swing section operation
* Dipper section operation
* Stabilizer section operation
* Backhoe RCV lever system
* Hydraulic oil tank
* Pilot oil supply unit
* Steering cylinder
* Hydraulic cylinder
* Clam & bucket cylinder
* Accumulator-air breather
* Electrical system
* Component location
* Starting-charging-lighting
* Monitoring system
* Console & switches
* Connector destination
* Troubleshooting procedure
* Hydraulic circuit diagrams
* Electrical wiring diagrams

The Hyundai HL770-9 and HL770XTD-9 backhoe loaders are powerful and versatile machines designed for a wide range of construction and infrastructure projects. These models are equipped with a robust 171 kW (230 hp) Cummins QSB6.7 engine, delivering ample power for demanding tasks. The HL770-9 boasts a maximum digging depth of 6.3 meters and a breakout force of 125 kN, making it ideal for excavating trenches, foundations, and other large-scale projects. The HL770XTD-9 further enhances these capabilities with its extended digging depth of 7.1 meters, allowing for even deeper excavations. Both models feature a spacious and ergonomic operator cab with exceptional visibility, ensuring operator comfort and safety. The cab is equipped with a comprehensive instrument panel and intuitive controls, facilitating precise operation and maximizing productivity.

Beyond their impressive digging capabilities, the HL770-9 and HL770XTD-9 backhoe loaders are also highly capable of material handling. The loader arm boasts a generous lifting capacity, enabling efficient loading and unloading of materials, such as sand, gravel, and debris. The hydraulically controlled boom and bucket offer precise control, ensuring accurate placement and minimizing spills. The HL770-9 and HL770XTD-9 are built with Hyundai's renowned durability and reliability, featuring rugged construction and high-quality components. Both models are designed for long-term operation in demanding environments, minimizing downtime and maximizing return on investment. Their robust design, coupled with their advanced features and versatile applications, make the HL770-9 and HL770XTD-9 backhoe loaders valuable assets for any construction or infrastructure project.