A Hitachi roofing nailer is a reliable tool for roofing and siding projects, but like any tool, it can encounter issues. If your Hitachi roofing nailer won’t fire, this guide provides straightforward troubleshooting steps for both technical and non-technical users.

1. Verify Safety Precautions

Before troubleshooting, ensure you’ve taken the necessary safety precautions:

• Disconnect the nail gun from the air compressor to prevent accidental firing.
• Always wear safety glasses and ear protection when working with power tools.

2. Check Air Supply

The most common reason for a roofing nailer not firing is an insufficient air supply. Follow these steps to check:

• Ensure your air compressor is plugged in, powered on, and operating within the recommended PSI range for your nailer (typically 70-120 PSI).
• Confirm that the air hose is properly connected to both the compressor and the nail gun.
• Look for air leaks in the hose or connections, as this can disrupt the flow of air to the nailer.

3. Inspect Nails and Magazine

A jammed or incorrectly loaded magazine can cause firing issues:

• Ensure the nails in the magazine are the correct type and size for your nailer.
• Check for any nails that may be jammed or misaligned in the magazine. Clear any obstructions.

4. Examine Depth Adjustment

The depth adjustment feature on your roofing nailer allows you to control how deeply the nails are driven. If it’s set too low, the nailer may not fire:

• Adjust the depth control to the desired setting, typically clockwise for deeper and counterclockwise for shallower nail penetration.

5. Maintenance and Lubrication

Regular maintenance is essential for the proper function of your roofing nailer:

• Ensure the nailer is clean and free from debris, as dirt and dust can affect performance.
• Lubricate the nailer with the recommended oil (check the user manual) to keep moving parts working smoothly.

6. Test with a Different Air Hose and Compressor

Sometimes, a roofing nailer issue may stem from the air supply. Test the nailer with a different air hose and compressor to rule out any problems with your current setup.

7. Seek Professional Help

If you’ve gone through the above steps and your roofing nailer still won’t fire, it may be time to consult a professional technician or the manufacturer’s customer support for more in-depth diagnostics and repairs.

Conclusion

A Hitachi roofing nailer is a valuable tool for roofing and siding projects, but like any tool, it can face operational issues. By following these simple troubleshooting steps, you can often resolve the problem of your nailer not firing. Always prioritize safety and maintenance to keep your roofing nailer in top working condition.