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New Holland C185 ACC: Troubleshooting and Insights
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The New Holland C185 is a powerful compact track loader, widely known for its versatility and robust performance in a variety of construction, landscaping, and agricultural tasks. However, like all heavy machinery, the C185 occasionally faces issues, especially when it is exposed to harsh working conditions or after extensive use. One such concern raised by many operators is the ACC (Auxiliary Control Circuit) system, which is crucial for operating high-flow attachments. In this article, we will explore common issues associated with the C185 ACC system, provide troubleshooting steps, and offer best practices for maintaining the machine for optimal performance.
Overview of the New Holland C185 Compact Track Loader
The New Holland C185 is a part of the company’s popular compact track loader lineup, designed for demanding work environments. Known for its excellent lift capacity and all-terrain capabilities, the C185 is used extensively for material handling, earthmoving, and loading tasks.
Key Specifications:
  • Engine Power: The C185 is equipped with a 67.5-horsepower engine that delivers efficient power for various attachments.
  • Lift Capacity: It has a rated operating capacity of around 1,850 pounds (839 kg), making it capable of lifting a wide range of materials and equipment.
  • Hydraulic Flow: With a high-flow auxiliary hydraulics system, the C185 can power multiple attachments like augers, breakers, and snow blowers.
  • Tracks: The C185 features durable rubber tracks that allow it to operate in challenging terrains like mud, snow, and soft soil, providing stability and better traction.
Common Issues with the New Holland C185 ACC System
The Auxiliary Control Circuit (ACC) system on the C185 plays a crucial role in operating high-flow hydraulic attachments, which require more power than standard attachments. However, issues with this system can hinder attachment performance or cause the system to fail entirely. Some common ACC-related problems include:
1. Weak or Inconsistent Hydraulic Flow
This is one of the most common complaints among C185 operators. The ACC system is designed to supply hydraulic flow for attachments that require high power, but sometimes the flow may seem weak or inconsistent, making it difficult to operate attachments efficiently.
Possible Causes and Solutions:
  • Cause: Low hydraulic fluid levels.
    • Solution: Check the hydraulic fluid reservoir and fill it to the correct level. Low fluid levels can cause poor hydraulic performance.
  • Cause: Clogged or dirty hydraulic filter.
    • Solution: Replace or clean the hydraulic filter. A clogged filter restricts fluid flow, leading to suboptimal attachment performance.
  • Cause: Faulty hydraulic pump.
    • Solution: If the pump is malfunctioning, it may not be supplying the correct pressure to the ACC system. Have the pump tested and replaced if necessary.
2. ACC Control Valve Failure
The ACC system relies on a control valve to direct hydraulic flow to the appropriate attachments. A failure in the control valve can cause the machine to lose the ability to supply power to certain attachments or prevent the proper operation of multiple attachments.
Possible Causes and Solutions:
  • Cause: Internal valve damage or wear.
    • Solution: Inspect the control valve for signs of wear or damage. If necessary, replace the valve to restore proper function.
  • Cause: Air in the hydraulic system.
    • Solution: Bleed the hydraulic system to remove any trapped air that may cause erratic flow or power loss.
3. Electrical or Wiring Issues with the ACC System
The ACC system is also controlled by electrical signals, which can sometimes experience problems, such as poor connections or faulty sensors. These electrical issues can prevent the system from functioning correctly, leading to problems with attachments or hydraulic performance.
Possible Causes and Solutions:
  • Cause: Loose or corroded electrical connections.
    • Solution: Inspect all wiring and connections related to the ACC system. Tighten any loose connections and clean off any corrosion to ensure a proper electrical flow.
  • Cause: Faulty sensors or solenoids.
    • Solution: Test the sensors and solenoids controlling the ACC system. Replace any malfunctioning components to restore functionality.
4. Auxiliary Hydraulics Not Engaging
At times, the auxiliary hydraulics may fail to engage properly, preventing the operator from using attachments effectively. This could be due to issues in the system’s setup or malfunctioning components.
Possible Causes and Solutions:
  • Cause: Improper attachment connection.
    • Solution: Ensure that the attachment is properly connected to the hydraulic circuit. Sometimes, an incorrect connection can prevent the system from engaging.
  • Cause: Malfunctioning valve or actuator.
    • Solution: Test the valve and actuator controlling the hydraulic flow. If these components fail, they will need to be repaired or replaced.
Best Practices for Maintaining the New Holland C185 ACC System
Regular maintenance is essential to keep the C185 and its ACC system in top shape. By following these best practices, you can prevent common issues and ensure that your machine continues to perform efficiently.
1. Regularly Check Hydraulic Fluid Levels
Hydraulic fluid plays a vital role in the performance of the ACC system. Always check fluid levels before operating the machine, and ensure that the fluid is clean and free from contaminants. If the fluid appears dirty, replace it to maintain optimal performance.
2. Replace Hydraulic Filters
Hydraulic filters need to be replaced at regular intervals as specified in the manufacturer’s maintenance schedule. A clogged filter can lead to poor hydraulic flow, causing attachments to operate slowly or erratically.
3. Inspect and Clean the Hydraulic Lines
Check hydraulic lines for signs of wear, cracking, or leaks. Regularly inspect and clean the lines to ensure that hydraulic fluid is being delivered efficiently to the system. Any blockages or restrictions can affect the overall performance of the machine.
4. Test and Maintain Electrical Connections
The ACC system depends on electrical signals to engage and control hydraulic functions. Regularly inspect the electrical wiring, solenoids, and sensors connected to the ACC system. Make sure connections are tight and clean to avoid potential issues.
5. Monitor Attachment Compatibility
Ensure that the attachments used are compatible with the C185’s high-flow hydraulic system. Incompatible attachments can strain the hydraulic system and lead to performance issues. Always check the manufacturer’s recommendations before using any new attachment.
6. Perform System Bleeding
Air trapped in the hydraulic system can cause erratic performance. If you experience poor or inconsistent hydraulic flow, bleed the system to remove trapped air and restore proper function.
Real-World Application: Troubleshooting in the Field
A real-life case involves a C185 operator who encountered intermittent issues with the ACC system during a construction project. The loader struggled to power a hydraulic breaker, and the system would sometimes fail to engage. After troubleshooting, it was discovered that a clogged hydraulic filter and low fluid levels were the main culprits. Once the filter was replaced and the fluid topped off, the machine’s performance was restored, and the hydraulic breaker operated smoothly.
In another case, a landscaper using the C185 for grading work noticed that the auxiliary hydraulics would not engage consistently. After inspecting the wiring, it was found that a corroded connection in the control circuit was interrupting the signal. Once the connection was cleaned and restored, the system engaged properly, allowing the operator to continue working without interruption.
Conclusion: Keeping Your New Holland C185 Running Smoothly
The New Holland C185 is a highly capable machine that can handle a variety of tasks when properly maintained. While the ACC system is integral to operating high-flow attachments, it’s important to regularly check the hydraulic system, electrical connections, and key components to prevent issues. By following the troubleshooting steps and best practices outlined in this guide, you can maximize the efficiency of your C185 and avoid costly repairs. Regular maintenance and timely repairs will help you get the most out of this powerful compact track loader, ensuring it continues to deliver outstanding performance for years to come.
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