Cummins crankshaft 4982120 4982121 3907803 3908031 4BT crankshaft B3.3 engine crankshaft Cummins 4BTAA crankshaft forged steel crankshaft

◆ Product Overview
High-strength forged steel crankshaft designed for Cummins 4BT, 4BTAA, and B3.3 series engines. Direct OEM replacement for part numbers 4982120, 4982121, 3907803, and 3908031. Engineered to restore original performance, durability, and reliability in industrial, automotive, and equipment applications.

◆ OEM Part Numbers
✓ 4982120
✓ 4982121
✓ 3907803
✓ 3908031

◆ Compatible Cummins Engine Series
✓ 4BT Engine Series
✓ 4BTAA Engine Series
✓ B3.3 Engine Series (3.3L)

◆ Product Specifications
✓ Condition: 100% Brand New
✓ Material: High-Grade Forged Steel
✓ Type: Precision-Balanced Engine Crankshaft
✓ Finish: OEM-Spec Hardening & Micro-Polishing

◆ Key Features
✓ Forged Steel Construction for Maximum Strength & Fatigue Resistance
✓ Direct Interchange with OEM Crankshafts – No Modifications Required
✓ Precision Balanced for Smooth Operation & Reduced Vibration
✓ Optimized for Durability in High-Torque Applications

◆ Quality Assurance
✓ 100% New Production – Not Remanufactured
✓ Dimensional Accuracy Certified to Cummins Specifications
✓ Ultrasonic & Magnetic Particle Inspection Passed
✓ Dynamic Balancing Verified for Optimal Performance

◆ Installation Applications
✓ Complete 4BT / B3.3 Engine Rebuild & Overhaul
✓ Crankshaft Failure Replacement in Industrial & Automotive Engines
✓ Performance Restoration for Generators, Pumps & Equipment
✓ Preventive Maintenance for Fleet & Machinery

◆ Service Advantages
✓ Restores Original Cummins Engine Performance & Longevity
✓ One Crankshaft for Multiple Engine Models Simplifies Inventory
✓ Global Shipping for Industrial & Automotive Markets
✓ Technical Data & Support Available