Cummins 4B3.9 engine assembly ISB3.9 QB3.9 diesel engine construction machinery engine assembly

Product Overview
We supply premium Cummins 4B3.9, ISB3.9, and QB3.9 complete diesel engine assemblies, engineered specifically for compact construction machinery and industrial equipment. These versatile 3.9-liter power units deliver reliable performance, excellent fuel efficiency, and durable operation in space-constrained applications requiring dependable power.

Available Engine Series
• Cummins 4B3.9 Series (Mechanical/Industrial)
• Cummins ISB3.9 Series (Electronic/Mid-Range)
• Cummins QB3.9 Series (Compact/Industrial)

Product Specifications
• Type: Complete Diesel Engine Assembly
• Configuration: In-line 4-Cylinder
• Displacement: 3.9 Liters
• Aspiration: Naturally Aspirated & Turbocharged Options
• Fuel System: Mechanical & Electronic Variants Available
• Cooling System: Liquid Cooled
• Condition: New, Complete Assembly

Key Features
✔️ Compact Design: Ideal power-to-size ratio for compact excavators, loaders, and skid steers.
✔️ Multiple Series Options: Choose between mechanical (4B3.9), electronic (ISB3.9), or compact industrial (QB3.9) configurations.
✔️ Proven 3.9L Platform: Global reputation for reliability in demanding construction environments.
✔️ Fuel-Efficient Operation: Optimized combustion delivers maximum work per gallon of fuel.
✔️ Easy Maintenance: Designed with serviceability in mind to reduce downtime and repair costs.
✔️ Complete Ready-to-Install Unit: Fully assembled long block minimizes installation complexity.

Quality Assurance
• Manufactured to Cummins original specifications and quality standards.
• Comprehensive performance validation and testing.
• Complete technical documentation provided for installation.

Primary Applications
• Compact Excavators & Mini Loaders
• Skid Steer Loaders & Compact Track Loaders
• Generator Sets & Welding Rigs
• Industrial Pumps & Compressors
• Agricultural & Municipal Equipment

Why Choose Cummins 3.9L Engine Assemblies
• Application Flexibility: Multiple series options for different equipment requirements.
• Proven Reliability: Trusted performance in compact equipment worldwide.
• Cost-Effective Operation: Excellent fuel efficiency reduces lifetime operating costs.
• Space-Optimized Design: Perfect for equipment with limited engine compartment space.
• Global Support: Backed by Cummins extensive parts and service network.