Hitachi 120 Pattern Change in Excavators

[MikePhua]

The Hitachi ZX120 is a compact and powerful tracked excavator that has been widely used in construction, landscaping, and demolition projects. Known for its fuel efficiency and exceptional digging capabilities, the ZX120 is a preferred choice for operators needing a balance of power and maneuverability in tight spaces. One aspect of the ZX120 that often comes into discussion is the ability to change the control pattern. This feature is crucial for operators who are accustomed to different control schemes and wish to customize their machine’s operation to fit their preferences or needs.
Understanding Control Patterns in Excavators
Excavators, including the Hitachi ZX120, use different control patterns to operate the machine. These control patterns refer to how the joystick movements correspond to the movements of the machine's arm, boom, and tracks. The two most common control patterns are:

1. ISO Pattern (also known as SAE Pattern): In this pattern, the left joystick controls the boom (up and down), and the right joystick controls the arm (in and out). The track movements are controlled by foot pedals, with one pedal controlling forward and reverse movement and the other controlling left and right turns.
   
2. John Deere (or Excavator) Pattern: In this pattern, the left joystick controls the arm, while the right joystick controls the boom. The track movements are also controlled by foot pedals in the same manner as the ISO pattern.
   

The main difference between the two patterns is how the joystick movements are assigned to the boom and arm. Operators who have experience with one pattern may find it difficult to switch to the other, which is why many modern excavators, like the Hitachi ZX120, offer the ability to change the control pattern to suit the operator's preferences.
The Importance of Pattern Change
For operators who are accustomed to a specific pattern, switching to another pattern can be challenging and reduce productivity. This is especially true when working with equipment that requires precision, such as digging trenches or placing heavy materials. A control pattern change can significantly increase the comfort and efficiency of the operator, particularly when transitioning between different types of machines.
The ability to change the control pattern is especially useful for rental fleets, where multiple operators with varying preferences may use the same machine. By having the option to customize the control pattern, the machine can be tailored to suit the needs of the operator, improving ease of use and reducing training time.
Changing the Control Pattern on Hitachi ZX120
In Hitachi ZX120 excavators, changing the control pattern is relatively simple, allowing for flexibility during operation. While the exact process may vary slightly depending on the machine’s model year or configuration, the general procedure involves adjusting the settings in the operator's cabin. Here’s an overview of how the process typically works:

1. Locate the Control Pattern Switch: The Hitachi ZX120 comes with a control pattern switch located near the operator’s seat. In some models, this switch is a lever that you can manually adjust to toggle between the ISO and John Deere patterns.
   
2. Select Your Desired Pattern: Once you have identified the control pattern switch, toggle it to select the desired control scheme. Some machines may have an electronic switch, allowing for an even quicker change.
   
3. Test the Controls: After switching the pattern, it is important to test the machine's controls to ensure the pattern change was successful. Move the joysticks and check if the arm and boom respond in the expected manner. It’s also recommended to test the track controls.
   
4. Adjust Foot Pedals if Necessary: In some machines, the foot pedals may also need to be adjusted to suit the new pattern. However, most modern Hitachi excavators automatically adjust the pedal layout when changing patterns.
   
5. Consult the Manual: Always consult the machine's operator manual to ensure you're following the correct procedure. If you're unsure or encounter any issues, the manual will provide troubleshooting tips and further instructions.
   

Benefits of Pattern Change for Operators

1. Customization: The ability to adjust the control pattern according to personal preference allows operators to use the machine in the way that is most comfortable for them. This leads to better control and precision, particularly during complex tasks.
   
2. Efficiency: Operators who are more comfortable with a specific control pattern tend to work faster and more accurately, which increases productivity. Having the ability to change the pattern without having to switch machines can save time and reduce training costs.
   
3. Reduced Fatigue: Excavator operation, especially in challenging environments, can be physically demanding. By adapting the control pattern to suit the operator’s natural hand movements, fatigue can be reduced. This improves both comfort and safety during long working hours.
   
4. Flexibility for Rental Fleets: For businesses that rent out equipment, the ability to change control patterns increases the versatility of the machine. Operators with different preferences can use the same machine, which is particularly useful for rental fleets serving a variety of industries and clients.
   
5. Improved Versatility: The pattern change feature makes the ZX120 versatile, allowing it to be used by a wider range of operators. This is especially beneficial for construction companies, rental companies, or operators who switch between various machines with different control patterns.
   

Limitations and Considerations
While the control pattern change feature is highly beneficial, there are some considerations to keep in mind:

1. Operator Training: Although changing the pattern can improve comfort, operators may still need to undergo some training or familiarization with the new pattern to ensure they are working as efficiently as possible.
   
2. Pattern Availability: Not all Hitachi ZX120 models may offer a pattern change option. This feature is typically available in newer models or specific configurations, so it is important to verify whether the machine you’re using has this functionality.
   
3. Switching Between Patterns: Switching between patterns should be done with caution. After changing the pattern, operators must ensure that all settings, including pedal configurations and joystick response, are properly calibrated. Improper switching could cause confusion and reduce performance.
   
4. Maintenance: While the pattern change is generally easy to adjust, it’s essential to ensure that all components, including joysticks, pedals, and control switches, are regularly maintained. Regular servicing will ensure the system continues to function smoothly and without issues.
   

Conclusion
The ability to change the control pattern on the Hitachi ZX120 is an important feature that enhances operator comfort, efficiency, and versatility. By offering both ISO and John Deere control patterns, Hitachi ensures that operators with different preferences can use the machine to its full potential. Whether you are a construction professional or working with a rental fleet, this simple yet valuable feature helps increase productivity and reduce fatigue. Proper understanding and maintenance of the pattern change system are essential for maximizing the performance of the machine and ensuring smooth operation in various applications.