1991-1994 Cummins 4BT and 6BT Service & Repair Manual

This shop manual covers the Cummins 4BT3.9 and 6BT5.9 engines and is applicable for the 1991 and 1994 certification levels. It is a comprehensive factory manual spanning 461 pages, providing essential information for both professional mechanics and DIY enthusiasts.

• Engine ID
• Engine disassembly and assembly
• Cylinder block
• Cylinder head
• Rocker levers
• Cam followers
• Fuel system
• Injectors
• Lubricating oil system
• Cooling system
• Drive units
• Air intake
• Exhaust system
• Air equipment
• Electrical equipment
• Engine testing
• Mounting adaptions
• Specifications
• Service literature

This manual is an invaluable resource for understanding and maintaining these Cummins engines, offering detailed insights into various components and systems.