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Upgrading the Case 580CK: Converting from Generator to Alternator with Charging Light Integration
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Introduction
The Case 580CK, a popular backhoe loader from the late 1960s and early 1970s, originally came equipped with a generator-based charging system. Over time, many operators have opted to upgrade to a more efficient alternator system. This conversion not only enhances charging capabilities but also allows for the integration of a charging indicator light, providing real-time feedback on the electrical system's status.
Understanding the Conversion
Converting from a generator to an alternator involves several key steps:
  1. Selecting the Right Alternator: A Delco 10SI alternator is a common choice due to its reliability and ease of installation.
  2. Mounting the Alternator: Custom brackets may be required to fit the alternator onto the existing generator mount points.
  3. Wiring the System: Proper wiring is crucial for the alternator to function correctly and to integrate the charging light.
Wiring the Alternator
The Delco 10SI alternator typically has three terminals:
  • BATT: Connects directly to the battery positive terminal.
  • #1 (Exciter): Requires a 12V signal, usually sourced from the ignition switch, to activate the alternator.
  • #2 (Sense): Monitors the battery voltage to regulate charging.
To integrate a charging light, the #1 terminal can be wired through the light to the ignition switch. When the engine is off, the light will illuminate, indicating no charging. Once the engine starts and the alternator begins charging, the voltage at the #1 terminal rises, causing the light to turn off.
Installing the Charging Light
The charging light serves as a visual indicator of the alternator's charging status. To install:
  1. Choose a Suitable Location: Select a location on the dashboard where the light will be visible to the operator.
  2. Wire the Light: Connect one side of the light to the #1 terminal of the alternator and the other side to the ignition switch.
  3. Test the System: With the ignition on and the engine off, the light should illuminate. Starting the engine should cause the light to turn off, indicating charging is occurring.
Troubleshooting Tips
If the charging light remains on after the engine starts, consider the following:
  • Check Wiring Connections: Ensure all connections are secure and free of corrosion.
  • Inspect the Alternator: Test the alternator to ensure it is functioning correctly.
  • Verify the Voltage Regulator: A faulty regulator can prevent proper charging.
For more detailed guidance, refer to the "Step by Step 12-Volt Conversion" article by Bob Melville, available on the Yesterday's Tractors website.
Conclusion
Upgrading the Case 580CK from a generator to an alternator system with a charging light integration enhances the reliability and functionality of the electrical system. By carefully selecting components, wiring correctly, and troubleshooting as needed, operators can ensure their equipment remains in optimal working condition.
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