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The John Deere 120 is a popular model of excavator known for its versatility and reliability in various construction tasks. One important feature that operators often need to adjust is the control pattern. Changing the control pattern on an excavator can significantly affect its ease of use and performance, especially when transitioning between different types of equipment or personal preferences. In this article, we will walk through the process of changing the control pattern on the John Deere 120 and explain why this adjustment is beneficial.
Understanding the Control Pattern on an Excavator
Changing the control pattern on a John Deere 120 excavator is a simple but important adjustment that can greatly enhance operator comfort and efficiency. Whether it’s for personal preference, job-specific requirements, or training new operators, the ability to switch between control patterns ensures that the machine can be tailored to meet the operator’s needs. By following the steps outlined in this guide and maintaining the control system, you can ensure smooth operation and better performance of your John Deere 120 excavator.
Understanding the Control Pattern on an Excavator
- What is Control Pattern?
The control pattern on an excavator refers to the configuration of the joystick controls used to operate the machine’s boom, arm, bucket, and swing movements. The two most common control patterns used in excavators are:- ISO Pattern (or SAE pattern): In this setup, the left joystick controls the boom and arm, while the right joystick controls the swing and bucket.
- John Deere Pattern: This pattern differs slightly from the ISO, with the left joystick controlling the swing and the right joystick controlling the boom and arm.
- ISO Pattern (or SAE pattern): In this setup, the left joystick controls the boom and arm, while the right joystick controls the swing and bucket.
- Operator Preference
Different operators may have different preferences when it comes to control patterns. For example, someone who has been trained on a specific control pattern may find it easier to work with that pattern rather than switch between machines with different setups. By changing the control pattern, the operator can work more efficiently and comfortably.
- Job-Specific Requirements
In some cases, the nature of a specific job might dictate a particular control pattern. For example, digging or lifting tasks might benefit from one pattern over another, depending on the type of movement required.
- Training New Operators
When training new operators, adjusting the control pattern to match their previous experience can reduce the learning curve and help them become proficient more quickly.
- Locate the Control Pattern Selector
The John Deere 120 comes equipped with a control pattern selector switch, which allows operators to switch between the ISO and John Deere patterns. The selector is typically located on the front or side panel of the operator’s seat, within easy reach of the operator.
- Turn Off the Excavator
Before making any adjustments to the control pattern, ensure that the excavator is turned off and the hydraulic system is depressurized. This is important for safety and to avoid any unintended movements while adjusting the controls.
- Adjust the Control Pattern Selector
- Using the selector switch, toggle between the different control patterns. The John Deere 120 offers an intuitive switch that allows operators to easily switch between the ISO and John Deere patterns.
- Some models may feature a lever or button on the seat or near the joystick to initiate the change.
- Using the selector switch, toggle between the different control patterns. The John Deere 120 offers an intuitive switch that allows operators to easily switch between the ISO and John Deere patterns.
- Test the New Control Pattern
After switching the control pattern, it is important to test the new configuration before beginning any work. Start the engine and operate the machine's controls to verify that the pattern is set correctly and that all movements are responding as expected.
- Fine-Tuning the Settings
In some cases, operators may need to fine-tune the joystick sensitivity or responsiveness to better match their preferred control pattern. Check the operator’s manual for instructions on adjusting joystick controls if necessary.
- Check for Control Wear
After adjusting the control pattern, it’s a good idea to check the condition of the joysticks and control mechanisms. If the excavator has been in use for a long time, the controls may show signs of wear, which can affect their performance.
- Ensure Proper Calibration
If the pattern change is not responding correctly, ensure that the control system is properly calibrated. Refer to the operator’s manual or consult a technician if calibration issues persist.
- Regular Inspection
Since the control pattern selector is a mechanical part, regular inspections are essential to ensure it is working correctly. Look for any signs of wear, damage, or dirt that could affect the selector’s functionality.
Changing the control pattern on a John Deere 120 excavator is a simple but important adjustment that can greatly enhance operator comfort and efficiency. Whether it’s for personal preference, job-specific requirements, or training new operators, the ability to switch between control patterns ensures that the machine can be tailored to meet the operator’s needs. By following the steps outlined in this guide and maintaining the control system, you can ensure smooth operation and better performance of your John Deere 120 excavator.
