Cummins B3.9, B4.5, B4.5 RGT, B5.9 Series Engines OEM Service & Repair Manual
Cummins B3.9, B4.5, B4.5 RGT, B5.9 Series Engines OEM Service & Repair Manual
Models covered:
- Cummins B3.9
- Cummins B4.5
- Cummins B4.5 RGT
- Cummins B5.9
The Cummins B3.9, B4.5, B4.5 RGT, and B5.9 Series Engines OEM Service & Repair Manual lays it all out in plain detail. Whether you're knee-deep in a rebuild or chasing down a hard-start issue, this manual walks you through the factory procedures used by professional diesel techs worldwide.
Inside, you’ll find full breakdowns of engine disassembly, troubleshooting flowcharts, fuel system service, and top-to-bottom mechanical work—including the cylinder head, rocker levers, cam followers, and cooling system. Oil pumps, injectors, and compressed air systems are covered in-depth, along with drive units and mounting procedures.
Content overview:
- General engine introduction, model identification, and familiarization
- Troubleshooting procedures and symptom diagnostics
- Complete engine disassembly and assembly procedures
- Detailed breakdown of the cylinder block, head, rocker levers, cam followers, and tappets
- Comprehensive fuel system servicing, including injectors and fuel lines
- Lubrication system service including oil filters and pump components
- Engine cooling system diagnostics and maintenance
- Drive unit inspection and service procedures
- Air intake and exhaust system diagnostics
- Compressed air system operation and service
- Electrical equipment, including wiring and system components
- Engine testing procedures for performance evaluation
- Mounting adaptation guidelines and installation procedures
- Miscellaneous engine-related systems and components
- Service literature references and component manufacturer details
- Technical specifications and torque values for service accuracy
Perfect for heavy-duty shop mechanics or weekend wrenches who know their way around a Cummins block. This guide is a full-blown, factory-grade reference with torque specs, test procedures, and practical steps that'll actually help you fix the thing. Just the way a real manual should be.
Printable: Yes
Language: English
Compatibility: Pretty much any electronic device, incl. PC & Mac computers, Android and Apple smartphones & tablet, etc.
Requirements: Adobe Reader (free)




