Difference Between D85A and D85E-18: Komatsu Dozers Comparison

[MikePhua]

Introduction
Komatsu’s D85 series dozers are known for their reliability and power in heavy-duty construction tasks. The D85A and D85E-18 models are two popular variants in the D85 range, both designed for efficient earth-moving operations. However, they differ in key aspects such as engine performance, transmission systems, and other features. In this article, we will compare the Komatsu D85A and D85E-18 to help you understand their differences and make an informed decision.
Key Differences Between the D85A and D85E-18

1. Engine Performance
   • D85A: The D85A is equipped with a Komatsu S6D125E-1 engine, which delivers a substantial amount of horsepower. The engine is designed for efficiency and longevity, making it a good choice for rugged environments where reliability is crucial.
     
   • D85E-18: The D85E-18 features a more advanced Komatsu SAA6D140E-5 engine. This engine not only offers improved horsepower but also incorporates newer technologies for better fuel efficiency and lower emissions. The D85E-18 engine is designed for enhanced performance in various working conditions.
     
2. Transmission and Drive System
   • D85A: The D85A uses a mechanical transmission, which is more traditional and less complex. While effective, it lacks some of the advanced features seen in newer models, which may affect efficiency and ease of operation.
     
   • D85E-18: The D85E-18, on the other hand, is equipped with a more advanced hydrostatic transmission (HST). This system provides smoother operation, more precise control, and better fuel efficiency compared to the mechanical transmission of the D85A. The HST allows for better control of speed and power, making the D85E-18 more adaptable to varying work conditions.
     
3. Hydraulic Systems
   • D85A: The hydraulic system in the D85A is a conventional system that performs well for standard dozing tasks. However, it may lack the speed and responsiveness of newer hydraulic technologies.
     
   • D85E-18: The D85E-18 features an advanced hydraulic system that offers higher flow rates, better control, and improved efficiency. This enhanced system makes the D85E-18 more suitable for heavy-duty applications, such as lifting or pushing large amounts of material.
     
4. Fuel Efficiency and Emissions
   • D85A: The fuel efficiency of the D85A is solid, but it lacks the cutting-edge emissions control technologies found in newer models. While it complies with older emissions standards, it is not as efficient as the D85E-18 in terms of fuel consumption and emissions.
     
   • D85E-18: The D85E-18 is designed with modern emissions control technologies, making it more fuel-efficient and environmentally friendly. Its engine delivers more power per unit of fuel consumed, reducing operating costs over time.
     
5. Cab and Operator Comfort
   • D85A: The cab in the D85A is functional and provides a comfortable working environment. However, it may not feature as many modern ergonomic enhancements or advanced technologies as newer models.
     
   • D85E-18: The D85E-18 offers a more comfortable and ergonomic cab design. With improved air conditioning, better noise insulation, and more adjustable seating, it enhances operator comfort and reduces fatigue during long hours of operation.
     
6. Weight and Size
   • D85A: The D85A has a slightly lighter design compared to the D85E-18, which can make it more maneuverable in certain applications. However, this reduction in weight can also limit its capacity to handle heavy loads in extreme conditions.
     
   • D85E-18: The D85E-18 is generally heavier and more robust, which improves its stability and load-bearing capacity. This makes it better suited for high-performance tasks such as heavy earthmoving and mining operations.
     

Maintenance and Durability
Both the D85A and D85E-18 are built to withstand tough working conditions, but the D85E-18, with its newer technology and improved components, may require fewer repairs and offer better long-term durability. The D85E-18’s enhanced hydraulic system, engine, and transmission all contribute to reduced wear and tear over time.
Cost and Availability of Parts

• D85A: Since the D85A is an older model, parts may be more difficult to find, and maintenance costs could be higher due to its mechanical components.
  
• D85E-18: The D85E-18, being a newer model, benefits from more readily available parts and potentially lower maintenance costs due to its modern design.
  

Which Model Should You Choose?

• Choose the D85A if you need a more budget-friendly option and are working in less demanding environments. Its simpler mechanical system might be more suitable for those who prefer a more straightforward machine with fewer complexities.
  
• Choose the D85E-18 if you require a high-performance machine with advanced technology for heavy-duty tasks. Its superior fuel efficiency, modern hydraulic system, and enhanced operator comfort make it the better choice for those looking for cutting-edge performance in a variety of applications.
  

Conclusion
The Komatsu D85A and D85E-18 offer different strengths suited to various work environments. The D85A is a reliable, straightforward machine with a mechanical transmission, while the D85E-18 brings modern features such as a hydrostatic transmission, enhanced hydraulic systems, and better fuel efficiency. By understanding the differences between these two models, you can make an informed decision that best meets your specific operational needs.