JLG equipment warning lights are crucial indicators of potential issues or unsafe operating conditions. Understanding these lights and knowing how to troubleshoot them is essential for maintaining safety and efficiency on the job site. This guide will help you identify common warning lights, their meanings, and steps to resolve the issues they indicate.

Warning Light Identification

JLG machines typically feature several warning lights on the control panel. These may include:

  • Engine Oil Pressure Light
  • Battery Charge Light
  • Engine Temperature Light
  • Tilt Alarm Light
  • System Distress Light
  • Overload Warning Light

Each light serves a specific purpose and requires different troubleshooting approaches.

Engine Oil Pressure Light

If the engine oil pressure light illuminates:

1. Immediately shut down the engine to prevent damage.

2. Check the oil level using the dipstick.

3. If low, add the appropriate type and amount of oil.

4. If the oil level is correct, there may be a problem with the oil pump or pressure sensor.

Battery Charge Light

A lit battery charge light may indicate:

  • Loose or corroded battery connections
  • Faulty alternator
  • Worn drive belt

To troubleshoot:

1. Inspect battery connections and clean if necessary.

2. Check the alternator belt for proper tension.

3. If the problem persists, the alternator may need replacement.

Engine Temperature Light

An illuminated temperature light suggests the engine is overheating. Take these steps:

1. Safely lower the platform and shut off the engine.

2. Allow the engine to cool before opening the radiator cap.

3. Check coolant levels and add if necessary.

4. Inspect for visible leaks in the cooling system.

5. Ensure the radiator is clean and unobstructed.

Tilt Alarm Light

The tilt alarm light indicates the machine is not on level ground. To address this:

1. Immediately stop all boom movements.

2. Retract the boom and lower it to the stowed position.

3. Move the machine to level ground before resuming operation.

4. If on level ground, recalibrate the tilt sensor.

System Distress Light

This light, often accompanied by a fault code, indicates a system malfunction. To troubleshoot:

1. Note any fault codes displayed.

2. Refer to the operator's manual for specific code meanings.

3. Perform the recommended actions for the given code.

4. If unable to resolve, contact a JLG-certified technician.

Overload Warning Light

An overload warning light indicates the platform is carrying too much weight. To resolve:

1. Immediately stop all operations.

2. Carefully remove excess weight from the platform.

3. If the light remains on with proper load, check the load sensor calibration.

General Troubleshooting Tips

  • Always refer to the specific model's operator manual for detailed troubleshooting steps.
  • Ensure regular maintenance is performed to prevent warning light issues.
  • Keep the control panel clean for clear visibility of warning lights.
  • Train operators to recognize and respond appropriately to warning lights.
  • Never ignore or bypass warning lights, as this can lead to serious safety hazards or equipment damage.

By following these guidelines, you can effectively troubleshoot JLG warning lights and maintain safe, efficient operations. Remember, if you're unsure about any warning light or unable to resolve the issue, always consult with a qualified JLG technician.

FAQs About JLG Warning Lights

    • What should I do if multiple warning lights come on at once?
      Immediately cease operations, lower the platform if safe to do so, and shut down the machine. Consult the operator's manual and contact a JLG technician for assistance.
    • How often should warning lights be tested?
      Warning lights should be tested at the start of each shift as part of the pre-operation inspection.
    • Can I continue to use the machine if a warning light is flickering but not constantly on?
      No, any abnormal warning light behavior should be treated seriously. Investigate the cause before continuing operation.