The Cummins 855 engine is a powerhouse known for its durability and performance, making it a popular choice in various heavy-duty applications. Understanding the torque specifications for this engine is crucial for mechanics and operators alike, as it directly impacts performance, efficiency, and longevity. This guide will delve into the specific torque specs relevant to the Cummins 855, particularly in the context of the Chinese market.
Readers can expect to gain a comprehensive understanding of the torque specifications, including the importance of proper torque settings during installation and maintenance. We will cover the recommended torque values for various components, ensuring that you have the knowledge needed to optimize engine performance. Additionally, we will discuss common challenges and best practices for working with the Cummins 855 in China, providing valuable insights for both seasoned professionals and newcomers.
Comprehensive Guide to Cummins 855 Engine Torque Specifications
The Cummins 855 engine, also known as the NT-855, is a powerful diesel engine widely used in heavy-duty applications. Renowned for its reliability and performance, it has become a staple in the trucking and construction industries. This guide will delve into the technical features, specifications, and variations of the Cummins 855 engine, providing a thorough understanding of its capabilities.
Technical Features of the Cummins 855 Engine
The Cummins 855 engine is characterized by its robust design and impressive specifications. Below is a comparison table highlighting its key technical features:
| Feature | Specification |
|---|---|
| Engine Type | Inline 6-cylinder |
| Displacement | 14 liters (855 cubic inches) |
| Fuel System | Direct Injection |
| Compression Ratio | Varies by model |
| Aspiration | Turbocharged |
| Power Output | 250-400 horsepower |
| Torque Output | 900-1550 lb-ft |
| Cooling System | Water-cooled |
| Weight | Approximately 1,500-2,000 pounds |
The engine’s design allows for efficient fuel combustion, contributing to its high torque output. This makes it suitable for various applications, including trucks, construction equipment, and marine vessels.
Variations of the Cummins 855 Engine
The Cummins 855 engine has undergone several iterations since its introduction. Each version has unique specifications and torque values. Below is a comparison table of the different types of Cummins 855 engines:
| Model | Year Range | Rod Torque Range (ft-lb) | Cylinder Head Torque (ft-lb) | Main Torque Range (ft-lb) |
|---|---|---|---|---|
| NT-855-F2 | 1988-1991 | 75-175 | 100-220 | 110-305 |
| NT-855-F3 | 1988-1993 | 75-175 | 100-220 | 90-255 |
| NT-855-F4 | 1991-2000 | 75-195 | 100-220 | 90-255 |
| NT-855-F5 | 1991-Present | 75-195 | 100-220 | 90-255 |
These variations reflect improvements in torque specifications and overall performance, catering to different operational needs.
Torque Specifications
Torque is a critical measurement in engine performance, indicating the force available to move a vehicle. The Cummins 855 engine’s torque specifications vary by model and application. Here are the key torque specifications:
– Rod Torque: Ranges from 75 to 195 ft-lb depending on the model.
– Cylinder Head Bolt Torque: Consistently ranges from 100 to 220 ft-lb across all models.
– Main Torque: Varies from 90 to 305 ft-lb based on the bolt size used.
These specifications ensure that the engine operates efficiently and reliably under various conditions.
Maintenance and Service Intervals
Proper maintenance is essential for the longevity of the Cummins 855 engine. Regular oil changes and adherence to service intervals are crucial. Recommended engine oil includes Cummins CES 20076 or API CJ-4, with an oil capacity of approximately 38 liters (10 gallons).
Recommended Service Intervals
- Oil Change: Every 15,000 to 20,000 miles, depending on usage.
- Oil Filter Replacement: Every oil change.
- Fuel Filter Replacement: Every 10,000 miles.
Following these guidelines will help maintain optimal engine performance and reliability.
Conclusion
The Cummins 855 engine is a powerful and versatile diesel engine that has proven its worth in various heavy-duty applications. With its robust design, impressive torque output, and reliable performance, it remains a popular choice among operators in the trucking and construction industries. Understanding its specifications and maintenance requirements is essential for maximizing its potential.
FAQs
1. What is the displacement of the Cummins 855 engine?
The Cummins 855 engine has a displacement of 14 liters (855 cubic inches).
2. What is the torque range for the Cummins 855 engine?
The torque range varies by model, typically between 900 to 1550 lb-ft.
3. How often should I change the oil in a Cummins 855 engine?
It is recommended to change the oil every 15,000 to 20,000 miles, depending on usage.
4. What type of fuel system does the Cummins 855 engine use?
The Cummins 855 engine utilizes a direct injection fuel system for efficient combustion.
5. Where can I find more information about the Cummins 855 engine?
You can find detailed specifications and torque values on websites like www.scribd.com, myenginespecs.com, itstillruns.com, www.torquepower.com.au, and www.cummins.com.