This comprehensive service repair manual provides detailed instructions and information for Cummins B3.9, B4.5, B4.5 RGT, and B5.9 engines. It covers all aspects of maintenance, repair, and troubleshooting, ensuring you have the necessary resources to keep your engine running smoothly. This manual is your go-to guide for understanding the intricacies of these engines, from basic familiarization to advanced procedures.

The manual begins with a thorough introduction to the engines and their systems. It then guides you through engine identification, familiarization, and troubleshooting common symptoms. You'll find comprehensive information on engine disassembly and assembly, allowing you to perform a wide range of repairs.

Detailed sections cover each component of the engine, including the cylinder block, cylinder head, rocker levers, cam followers/tappets, fuel system, injectors and fuel lines, lubricating oil system, cooling system, drive units, air intake system, exhaust system, compressed air system, and electrical equipment.

The manual provides clear and concise explanations of engine testing procedures and mounting adaptations. It also includes a dedicated section on service literature and specifications, offering valuable reference material. With its wealth of information, real-world illustrations, and step-by-step instructions, this manual empowers you to perform repairs and maintenance confidently, saving you time and money.

The Cummins B3.9, B4.5, B4.5 RGT, and B5.9 engines are a range of powerful and reliable diesel engines produced by Cummins Inc., a renowned American manufacturer of diesel and natural gas engines. These engines have been widely employed in various applications, including heavy-duty trucks, buses, construction equipment, agricultural machinery, and marine vessels, due to their robust design, high performance, and exceptional durability. The B-series engines are known for their versatility, accommodating a wide range of power output requirements, and are characterized by their compact size and lightweight construction, making them suitable for diverse applications where space and weight are crucial factors.

Each engine within the B-series boasts unique features and specifications tailored to specific usage scenarios. The B3.9 engine, with a displacement of 3.9 liters, is a compact and fuel-efficient option, ideal for lighter-duty applications. The B4.5 and B4.5 RGT engines, featuring a 4.5-liter displacement, provide greater horsepower and torque, suitable for medium-duty applications. The B4.5 RGT variant is specifically designed for rear-guard truck applications. Lastly, the B5.9 engine, boasting a 5.9-liter displacement, offers the highest power output in the series, making it suitable for heavy-duty applications demanding maximum performance. All engines in the B-series are known for their longevity and reliability, coupled with efficient fuel consumption and low emissions, contributing to their widespread adoption across various industrial sectors.