This comprehensive KUBOTA G21LD G21HD Service Repair Manual provides detailed information and instructions for technicians, mechanics, and anyone seeking to repair, maintain, or understand the intricacies of these excavators. Dive deep into the inner workings of your machine with this essential resource, encompassing a vast array of topics including: * **General Information:** Get a firm understanding of the excavator's specifications, components, and overall design. * **Fuel System:** Master the intricacies of the fuel system, covering fuel injection, filtration, and related components. * **Chassis:** Gain detailed knowledge of the excavator's chassis, including its construction, suspension, and steering systems. * **Cooling System:** Learn about the cooling system's components, operation, and maintenance procedures. * **Engine Top End:** Explore the engine's upper components, including the cylinder head, valves, and camshaft. * **Engine:** Get a thorough understanding of the engine's mechanics, operation, and troubleshooting methods. * **Clutch:** Acquire detailed knowledge of the clutch system, covering its operation, adjustment, and maintenance. * **Engine Lubrication System:** Understand the intricacies of the engine's lubrication system, including oil filters, pumps, and maintenance practices. * **Engine Removal/Installation:** Learn the proper procedures for removing and installing the engine, ensuring a smooth process. * **Drive:** Explore the drive system, including the transmission, axles, and differential. * **Transmission:** Gain detailed knowledge of the transmission system, covering its functions, operation, and maintenance. * **Wheels/Tires:** Learn about the proper selection, installation, and maintenance of excavator tires. * **Final Drive:** Understand the final drive system's design, operation, and troubleshooting methods. * **Brakes:** Get comprehensive information on the excavator's braking system, covering its components, operation, and maintenance. * **Suspension:** Explore the suspension system's design, functions, and adjustment procedures. * **Steering:** Gain knowledge of the steering system's components, operation, and maintenance. * **Frame:** Understand the frame's construction, components, and potential issues. * **Electrical System:** Master the excavator's electrical system, including wiring diagrams, components, and troubleshooting techniques. * **Wiring Diagram:** Access detailed wiring diagrams for the entire electrical system, allowing for easy troubleshooting and repairs. * **Hydraulic System:** This section dives deep into the excavator's hydraulic system, covering the pump, main control valve, swing device, travel motor, RCV lever, and more. * **Troubleshooting:** Equip yourself with comprehensive troubleshooting guides for both hydraulic and electrical systems. * **Maintenance Standards:** Find detailed instructions on routine maintenance, including operating performance tests, major component checks, track and work equipment maintenance, and lubrication schedules. * **Disassembly and Assembly:** Learn the step-by-step procedures for disassembling and reassembling major components, ensuring proper alignment and functionality. * **Component Mounting Torque:** Access a comprehensive list of torque specifications for all major components, ensuring proper tightening during assembly and maintenance. * **Operating Manual Contents:** This manual also includes a detailed operating manual covering safety procedures, specifications, control devices, operation instructions, transportation guidelines, maintenance checks, troubleshooting guides, and information on optional hydraulic breakers and quick clamps.

The Kubota G21LD and G21HD excavators are compact, powerful machines designed for a variety of tasks in construction, landscaping, and utility work. These models offer a balance of maneuverability and digging force, making them suitable for tight spaces and demanding projects. Powered by a robust Kubota diesel engine, these excavators deliver impressive performance and efficiency. The G21LD and G21HD feature a hydraulic system designed for smooth operation and precise control of the boom, arm, and bucket. The compact design allows for easy transport, and the spacious cab provides operator comfort and visibility. A comprehensive service repair manual is essential for maintaining and repairing these Kubota excavators. The manual provides detailed information on every aspect of the machine's operation, including its hydraulic system, engine, electrical system, and undercarriage. With step-by-step instructions, diagrams, and troubleshooting guides, the manual empowers technicians and mechanics to perform service and repair tasks effectively. The manual covers topics ranging from basic maintenance procedures to complex component overhauls. It also includes important safety guidelines and specifications to ensure safe and efficient operation of the excavator. The Kubota G21LD and G21HD service repair manual is a valuable resource for anyone involved in maintaining and repairing these durable and versatile excavators.