Used Cummins QSB4.5 Diesel Engine for Sale | 4.5L 4-Cylinder Rebuilt for Excavators & Loaders

Are you looking for a reliable, electronically controlled used diesel engine for your excavator or wheel loader? This fully rebuilt Cummins QSB4.5 diesel engine delivers proven performance for demanding applications. With a 4.5-liter displacement and a turbocharged inline 4-cylinder design, this used engine for sale is a trusted power solution for excavators, wheel loaders, compactors, motor graders, and other heavy equipment. The QSB4.5 is part of Cummins’ B Series and is known for its fuel efficiency, strong low-end torque, and easy serviceability. It features a high-pressure common rail fuel system that delivers injection pressure up to 1600 bar for improved performance and fuel efficiency. We have completely overhauled this used engine for sale to restore its original factory performance. It offers a cost‑effective way to keep your heavy equipment running.

Applications & Compatibility

• Excavators: Direct fit for LiuGong 915E, Hitachi ZW series, and other mid-size excavators

• Wheel Loaders: Suitable for compact and mid-size wheel loaders

• Compaction Equipment: Soil compactors and rollers

• Motor Graders: Used in various grading applications

• Industrial Equipment: Compressors, generator sets, and other off-highway applications

Key Features

• Proven Cummins B Series Reliability: The QSB4.5 is based on the B Series engine platform. It features a robust parent bore cylinder block designed for reduced noise and increased durability.

• High-Pressure Common Rail Fuel System: The engine uses a high-pressure common rail fuel system that delivers injection pressure up to 1600 bar. This provides precise fuel delivery, improved performance, and better fuel efficiency at every rpm.

• Turbocharged and Charge Air Cooled: The wastegated turbocharger provides better low-speed performance and high-speed boost. The charge air cooler reduces intake air temperature for more efficient combustion.

• Multiple Emission Configurations: Depending on the variant, the QSB4.5 meets Tier 3, Tier 4 Interim, Tier 4 Final, EU Stage IIIA, Stage IV, or Stage V standards.

• Quiet Operation: The engine is quieter in operation than its predecessor. The rear gear train design significantly lowers noise output.

• Improved Cold-Start Capability: The QSB4.5 has improved cold-start capability, making it suitable for operation in colder climates.

• Electronic Engine Control: The engine combines full-authority electronic controls with the reliable performance of the B Series design.

• In-Cylinder Combustion Technology: The engine meets emissions standards without external components on Tier 3 versions. It is compatible with high-sulfur fuels for worldwide use.

• Fully Rebuilt to OEM Standards: We completely disassemble each engine and rebuild it to original Cummins factory specifications. We recondition the cylinder head and inspect the cylinder block. We service the fuel injection system and turbocharger. All critical wear parts are replaced with new components.

• Tested Before Shipping: Every unit is hot‑run tested to verify compression, oil pressure, cooling performance, and injection timing. A test report is available upon request.

• Ready to Install: This used engine for sale ships as a complete long‑block assembly with pre‑installed filters and fluids. Necessary mounting hardware and wiring harness are included for straightforward installation.

Why Buy From Us

• 12‑Month Warranty: Coverage for parts and workmanship on all rebuild components

• Worldwide Shipping: Secure export packaging and freight coordination available

• Compatibility Support: Free fitment check with your machine model and serial number

• Core Exchange Available: Ask about returning your old engine core to save on cost

• Documentation Provided: Full rebuild reports and test results upon request