This manual covers the Case 590 Super L backhoe loader, a versatile piece of equipment designed for a wide range of construction and utility tasks. Engineered for durability and performance, the 590 Super L features a robust diesel engine, typically a Case 4T-390 model, offering substantial power output for demanding applications. Its transmission options, including Powershuttle and Powershift, combined with 4WD capability, ensure efficient operation in various working conditions. The substantial operating weight and dimensions indicate its suitability for heavy-duty work, reflecting Case's commitment to producing reliable and capable machinery. The purpose of this comprehensive service and engine repair manual is to provide detailed information for the maintenance, repair, and troubleshooting of the Case 590 Super L backhoe loader. It includes essential technical specifications, fluid capacities, recommended maintenance intervals for critical components like the engine oil and hydraulic filters, and guidance on lubrication points. This manual is an indispensable resource for owners, operators, mechanics, and technicians, enabling them to ensure the longevity, optimal performance, and safe operation of their equipment through proper service and repair procedures.