Senco FinishPro 35 won't shoot nails (2023 Update)

I have an old Senco FinishPro 35. The firing mechanism isn't working properly. It seems to extend slowly, then stay in the extended position (won't retract to original position). How do I fix this?

Reply to
Donald Perkins
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It sounds like your Senco FinishPro 35 is experiencing an issue with the firing mechanism. Here are some steps you can take to troubleshoot and potentially fix the problem:

  1. Check the air pressure: Make sure the air pressure to the tool is adequate and within the recommended range (usually 90-120 PSI). If the pressure is too low, the tool may not have enough power to properly extend and retract the firing mechanism.
  2. Check the O-ring: Check the O-ring inside the magazine, it could be damaged or worn, and it will not seal the air that is being fed through the gun, and the gun won't work properly.
  3. Check the driver blade: Make sure the driver blade is properly seated and not damaged. The driver blade is responsible for pushing the nails out of the magazine, if it is not properly seated or damaged, the tool will not be able to fire nails.
  4. Check the safety valve: Check the safety valve, it could be clogged or damaged. If the safety valve is not working properly, the tool will not be able to fire nails.
  5. Check the trigger valve: Check the trigger valve, it could be clogged or damaged. If the trigger valve is not working properly, the tool will not be able to fire nails.
  6. If after checking all of these components, you are still experiencing issues, it may be best to consult the manufacturer or consult a professional for further assistance.

You will need the following tools:

  • Adjustable wrench
  • Screwdrivers
  • Pliers
  • O-ring pick

Keep in mind that troubleshooting and fixing the issue yourself may save you on labor costs, but it's important to ensure you have the necessary knowledge and experience to do so safely and effectively. Also, keep in mind that attempting to repair the tool yourself could void any warranty. In addition, it may be more cost-effective in the long run to have a professional repair or service the tool. If you decide to proceed with the repair, always make sure to disconnect the tool from the air supply and disconnect the power source before attempting any repairs.

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