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Understanding the BIC Auxiliary Hydraulic Valve on the Case 580 Super M
#1
Introduction
The Case 580 Super M backhoe loader, a staple in the construction industry, is renowned for its versatility and robust performance. A significant enhancement to its functionality is the addition of auxiliary hydraulics, enabling operators to power a variety of attachments such as breakers, augers, and compactors. Many of these systems are integrated through aftermarket kits, with the Buffalo Installation Corporation (BIC) Model K5500 being a notable example. Understanding the components and operation of this system is crucial for maintenance and troubleshooting.
Components of the BIC Auxiliary Hydraulic System
The BIC Model K5500 auxiliary hydraulic system comprises several key components:
  • Auxiliary Valve: This valve controls the flow of hydraulic fluid to the attachment.
  • Flow Control Knob: Mounted on the hydraulic line guard near the battery compartment, this knob adjusts the gallons per minute (GPM) flow rate. It operates via a cable mechanism, similar to a speedometer or emergency brake cable, which adjusts a metering valve inside the hydraulic valve assembly.
  • Electrical Switch: Located on the backhoe boom control lever, this switch activates the auxiliary valve when the system master switch is on.
  • Boom Hose Connections: These hoses deliver hydraulic fluid from the valve to the attachment, with pressure increasing when the system is activated.
Operation and Troubleshooting
Proper operation of the BIC auxiliary hydraulic system ensures efficient performance of attachments. However, issues may arise over time. One common problem is the malfunction of the flow control knob. If the knob becomes stiff or unresponsive, it may indicate a problem with the cable mechanism or the internal metering valve. Regular inspection and lubrication of the cable and valve assembly can prevent such issues.
Another potential issue is the failure of the electrical switch on the boom control lever. If the switch does not activate the auxiliary valve, it could be due to a faulty switch, wiring issues, or problems within the valve assembly itself. Testing the switch with a multimeter and inspecting the wiring for continuity can help diagnose the problem.
Maintenance Tips
To ensure the longevity and reliability of the BIC auxiliary hydraulic system:
  • Regular Inspection: Periodically check all components for signs of wear or damage.
  • Lubrication: Apply appropriate lubricants to moving parts to reduce friction and prevent corrosion.
  • Hydraulic Fluid: Maintain the correct level and cleanliness of hydraulic fluid to ensure optimal performance.
  • Component Testing: Use diagnostic tools to test electrical switches and hydraulic valves for proper operation.
Conclusion
The BIC Model K5500 auxiliary hydraulic system enhances the versatility of the Case 580 Super M backhoe loader, allowing it to power a wide range of attachments. Understanding the components and operation of this system is essential for effective maintenance and troubleshooting. By adhering to regular maintenance practices and promptly addressing any issues, operators can ensure the continued efficiency and reliability of their equipment.
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