Used Caterpillar 3304 Diesel Engine for Sale | 4.9L 4-Cylinder Rebuilt for Dozers & Loaders

Are you looking for a reliable used diesel engine for your dozer, wheel loader, or industrial equipment? This fully rebuilt Caterpillar 3304 diesel engine delivers proven performance for demanding applications. With a displacement of 4.9 liters and a naturally aspirated or turbocharged inline 4-cylinder design, this used engine for sale is a trusted power solution for dozers, wheel loaders, motor graders, and other heavy equipment. The 3304 is part of Caterpillar’s 3300 series, which is known for its mechanical simplicity, durability, and ease of maintenance. We have completely overhauled this used engine for sale to restore its original factory performance. It gives you a cost‑effective way to keep your heavy equipment working.

Applications & Compatibility

• Dozers: Direct fit for Caterpillar D4D, D4E, D4H, and D5B series dozers

• Wheel Loaders: Suitable for Caterpillar 910, 920, 926, 930, 936, IT18, IT28, and various compact to mid-size loaders

• Motor Graders: Used in Caterpillar 120G, 12G, 130G graders

• Industrial Equipment: Generator sets, pumps, compressors, and other stationary applications

Key Features

• Proven Caterpillar Reliability: The 3304 engine features a robust cast iron block and cylinder head. It is designed for continuous heavy-duty operation in demanding construction environments. Many of these engines run for 15,000‑20,000 hours with good maintenance.

• Mechanical Simplicity: The 3304 uses a mechanical fuel injection system. There are no complex electronics to fail. This makes it easier to maintain and repair, especially in remote job sites.

• Turbocharged Performance (3304T): The turbocharged version provides increased power output without increasing displacement. This gives you better torque for demanding applications like dozing and loading.

• Direct Injection System: The direct injection combustion system provides good fuel efficiency and reliable cold start performance.

• High Torque Rise: The engine is designed with a high torque rise, providing strong lugging power for heavy loads and difficult conditions.

• Proven in Major Equipment Brands: The 3304 engine powers Caterpillar D4D, D4H dozers, 920, 930 wheel loaders, and other equipment. This widespread use means parts and service information are readily available.

• Fully Rebuilt to OEM Standards: We completely disassemble each engine and rebuild it to original Caterpillar factory specifications. We recondition the cylinder head and inspect the cylinder block. We service the fuel injection pump and turbocharger (if equipped). 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