use caustic soda solution (Concentration 8-10%) Heat to 60℃ and soak the handpiece for 24 hours. cooler Use a high-pressure water gun (pressure>15MPa) to back-flush the copper tube. replacement All-oil sealing ring Avoid corrosion by residual cleaning agents.
[pdf] The quickest way for direct results is to get my Air Compressor Troubleshooting Guide. You press the start button but nothing happens. Either an electrical problem, or the compressor has tripped on a safety device. Check supply power. Check for errors on display. Check emergency stop is out.
[pdf] use caustic soda solution (Concentration 8-10%) Heat to 60℃ and soak the handpiece for 24 hours. cooler Use a high-pressure water gun (pressure>15MPa) to back-flush the copper tube. replacement All-oil sealing ring Avoid corrosion by residual cleaning agents.
[pdf] 
