Komatsu PC75UU-2E Pattern Change: How to Switch from ISO to SAE Pattern

[MikePhua]

The Komatsu PC75UU-2E is a popular mini-excavator known for its compact design and strong performance. However, like many excavators, it operates with a control pattern that can be customized to suit the operator’s preference. This article explores the process of changing the control pattern on a Komatsu PC75UU-2E, allowing the operator to switch between the ISO pattern and the SAE pattern, which is often preferred in different regions and by different operators.
Understanding Control Patterns
Excavators typically offer two types of control patterns: the ISO pattern and the SAE pattern. The difference between these patterns lies in the control layout for the arm and bucket movements:

• ISO Pattern: In this configuration, the left joystick controls the boom (up/down) and the bucket (in/out), while the right joystick controls the swing (left/right) and the arm (extend/retract).
  
• SAE Pattern: In the SAE pattern, the left joystick controls the boom (up/down) and swing (left/right), while the right joystick controls the arm (extend/retract) and the bucket (in/out).
  

Different operators prefer different patterns based on their prior experience or regional standards. While the ISO pattern is commonly used in Europe and parts of Asia, the SAE pattern is often preferred in North America. Some models, including the Komatsu PC75UU-2E, allow operators to change the pattern to suit their needs.
Why Change the Control Pattern?
Changing the control pattern is a matter of personal preference or regional standards. Operators accustomed to one pattern may find the other difficult to use, which can lead to discomfort, reduced efficiency, or even safety concerns. Being able to change the pattern offers greater flexibility and convenience for operators who may have experience with different machines or work in different regions.
Some reasons to consider changing the pattern include:

• Comfort and Efficiency: If an operator has been trained in one pattern, switching can make their work more efficient by reducing the time spent adjusting to new controls.
  
• Operator Preference: Some operators simply prefer the feel of one pattern over the other. Offering both patterns allows the machine to be versatile and suited to different people.
  
• Consistency Across Equipment: In larger fleets, ensuring that all machines use the same control pattern can help reduce confusion when operators switch between equipment.
  

How to Change the Control Pattern on the Komatsu PC75UU-2E
Changing the control pattern on the Komatsu PC75UU-2E involves a few simple steps that can be done manually or with the help of the machine's control system. While the process may vary slightly depending on the specific model and year, the general steps are as follows:

1. Locate the Control Pattern Selector:
   On most models, including the PC75UU-2E, there’s a pattern change valve or switch located either on the joystick or within the machine’s control console. This is often a simple toggle or a button that can be moved between two positions to switch between ISO and SAE patterns.
   
2. Switch the Pattern:
   With the machine turned off, move the control switch or lever to the desired pattern setting. In some models, this may require removing a cover panel to access the switch.
   
3. Verify the Change:
   After switching the pattern, start the machine and verify that the control response has changed. Test the joysticks to ensure that the boom, arm, bucket, and swing controls correspond to the selected pattern.
   
4. Consult the Operator’s Manual:
   If you cannot locate the control pattern switch or if the process isn’t clear, refer to the operator’s manual for detailed instructions specific to the Komatsu PC75UU-2E. The manual will provide diagrams and additional information on how to adjust the controls.
   
5. Consider Professional Help:
   If you are unable to change the pattern yourself or if the machine requires advanced adjustment, consult a Komatsu technician. They can help you configure the controls or make any necessary adjustments to the hydraulic systems that manage the control pattern.
   

Common Issues When Changing Control Patterns
While changing the control pattern is usually straightforward, some operators may experience issues during or after the switch:

• Joystick Response Issues: If the machine doesn't respond as expected after switching patterns, check the control linkages and ensure that the pattern change mechanism is fully engaged.
  
• Hydraulic Pressure Problems: In rare cases, a hydraulic pressure issue can cause problems with the control response. If switching the pattern results in inconsistent or unresponsive joystick movements, it may be necessary to check the machine’s hydraulic system for leaks or pressure irregularities.
  
• Misalignment: Occasionally, the switch mechanism or lever may not align properly, which can prevent the pattern change from taking effect. Ensuring that the machine is properly serviced and that the control mechanism is functioning correctly can resolve this.
  

Benefits of Changing the Control Pattern

1. Improved Comfort: Switching to the control pattern that the operator is most comfortable with can reduce fatigue, leading to more productive work hours.
   
2. Enhanced Precision: Familiarity with a control pattern means that operators can make more precise and confident movements, which is especially important when working with delicate or intricate tasks.
   
3. Adaptability: A flexible control system allows the machine to be adapted to different operators, making it easier to share equipment within a fleet or between different job sites.
   

Conclusion
The Komatsu PC75UU-2E offers operators the flexibility to switch between ISO and SAE control patterns, which enhances user comfort and productivity. Whether you are a seasoned operator or a new one, the ability to adjust the control pattern can significantly improve your work efficiency. If you are working with the PC75UU-2E, taking the time to understand how to change the pattern to your preferred configuration can make a noticeable difference in your performance on the job site.