Products Description
The Caterpillar 3406 is a legendary heavy-duty diesel engine renowned for its durability, power, and reliability. It has been widely used in trucking, construction, marine, industrial, and power generation applications since its introduction in the 1970s. The 3406 series includes mechanical and electronic versions, with the 3406E (Electronic) being one of the most popular models.
Key Features & Specifications
1. Engine Overview
- Model: Caterpillar 3406 (Mechanical) / 3406E (Electronic)
- Engine Type: 6-cylinder, in-line, 4-stroke diesel
- Displacement: 14.6 liters (893 cubic inches)
- Aspiration: Turbocharged & aftercooled (TA)
- Bore x Stroke: 137 mm x 169 mm (5.4 in x 6.65 in)
- Compression Ratio: 16.5:1 (varies by model)
2. Performance & Power Output
- Horsepower Range:
- 3406 (Mechanical): 250–425 HP
- 3406B/C: Up to 550 HP
- 3406E (Electronic): 300–600+ HP
- Peak Torque: Up to 1,850 lb-ft (2,500 Nm)
- Governed Speed: 1,800–2,100 RPM (depending on application)
- Fuel System:
- Mechanical: HEUI (Hydraulic Electronic Unit Injection) in later models
- Electronic (3406E): ADEM (Advanced Diesel Engine Management)
3. Durability & Reliability
- Heavy-Duty Construction: Cast-iron block and cylinder heads for long life.
- Forged Steel Crankshaft: Handles high torque and heavy loads.
- Overhead Camshaft Design: Ensures precise valve timing and reduced wear.
- Extended Service Intervals: High-capacity oil and filtration systems.
4. Applications
- Trucking: Heavy-duty highway trucks (Peterbilt, Kenworth, Freightliner)
- Construction & Mining: Loaders, bulldozers, excavators, off-road trucks
- Marine: Commercial vessels, workboats, propulsion, and auxiliary power
- Industrial & Power Generation: Prime and standby generators, pumps
5. Emissions Compliance
- Pre-Emissions (Older Models): Naturally aspirated or turbocharged without aftertreatment.
- Later Models (3406E): Meets Tier 1/Tier 2 emissions standards.
- Not Tier 4 Final Compliant: Replaced by newer Cat engines like C15.
6. Maintenance & Serviceability
- Easy Access: Components designed for straightforward servicing.
- Caterpillar Dealer Support: Global parts and service network.
- Diagnostic Tools: Electronic models (3406E) can be scanned with Caterpillar ET (Electronic Technician).
Conclusion
The Caterpillar 3406 remains one of the most trusted diesel engines ever built, especially in the trucking and construction industries. While newer emissions-compliant engines have replaced it, the 3406 (especially the 3406E) is still highly sought after for its ruggedness and serviceability.

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Company Profile
Hebei Keluo Construction Machinery Co., Ltd
Certainly! Here is marketing copy for the engines available in your company across pre-sales, after-sales, warranty, maintenance, and other aspects:

Pre-Sales:
Power Up Your Performance with Our Engine Selection!
Explore a diverse range of top-tier engines from renowned brands like Deutz, Cummins, Kubota, Volvo, Yanmar, Isuzu, Perkins, Weichai, and more. Enhance your operations with our reliable and efficient engine solutions tailored to meet your needs. Contact us today to find the perfect powerhouse for your application!
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Certifications
FAQ
Q1: What is your delivery time?
A: The delivery time is within 15 working days.
Q2: What is the payment term?
A: Normally we accept 30% deposit by TT for production, 70% balance by TT before shipping.
Q3: What color can I choose?
A: We can customize the color according to your color number.
Q4: Can I see the production progress after order?
A: Yes, during production, we can make video call and we could take photos/videos for your reference.
Q5: What kind of service can I get from you if I buy? How can I get parts?
A: We have 1 year warranty for each machine.Within 1 year warranty, if any parts failure caused by quality issues, the new parts would be sent to you free of charge within 5 working days. We have professional after sales department to support for you at any time.