This comprehensive Case 621B & 721B Loader Factory Service Repair Manual provides detailed instructions for maintaining and servicing your loader. It includes detailed diagrams and manufacturer specifications, ensuring you have the information you need to perform repairs and maintenance with confidence. The manual covers a wide range of topics, including: * **General Information:** This section provides an overview of the loader and its components. * **Engines:** This section covers the 621B 6T-590 Engine and the 721B 6T-830 Engine, including detailed information on operation, maintenance, and troubleshooting. * **Fuel System:** This section covers the fuel system, including the fuel tank, fuel lines, fuel filters, and fuel injectors. * **Electrical System:** This section covers the electrical system, including the battery, starter, alternator, and wiring diagrams. * **Steering System:** This section covers the steering system, including the steering wheel, steering column, and hydraulic steering system. * **Power Train:** This section covers the power train, including the transmission, axles, and differential. * **Brakes:** This section covers the braking system, including the brake drums, brake shoes, and hydraulic braking system. * **Hydraulics:** This section covers the hydraulic system, including the hydraulic pumps, hydraulic cylinders, and hydraulic lines. * **Chassis:** This section covers the chassis, including the frame, suspension, and wheels. This manual is written in clear and concise language, making it easy to understand and follow. The use of detailed diagrams and illustrations helps you visualize the components and procedures, making maintenance and repair tasks more straightforward. This manual is an essential resource for anyone who owns or works on a Case 621B or 721B Loader. It provides the information you need to keep your loader running smoothly and efficiently.

The Case 621B and 721B loaders are powerful, versatile machines designed for a wide range of construction, agricultural, and industrial applications. These loaders, manufactured by Case Construction Equipment, boast robust build quality and impressive performance capabilities. They are commonly seen in tasks such as material handling, loading trucks, excavating, and general site work. Both models share a similar design philosophy, with the 721B offering a larger capacity and more powerful engine compared to the 621B. The Case 621B and 721B loaders are equipped with diesel engines that provide ample power to handle demanding tasks. The 621B utilizes a smaller engine, typically a 4-cylinder unit, while the 721B features a larger, more powerful 6-cylinder engine. Both models feature hydrostatic drive systems, allowing for smooth and responsive operation with precision control. A spacious operator's cab provides a comfortable working environment with good visibility, critical for safe and efficient operation. The loaders are designed for ease of maintenance and serviceability, ensuring long operating life with minimal downtime. The Case 621B and 721B loaders, with their robust features and versatility, are reliable and highly sought-after machines in the construction and industrial sectors.