Non-atomized cooling water from handpiece and water spray from the handpiece
1During this period, it needs compressed air, and now the tube of the handpiece is lack of air or too small air flow.Check the “Air switch” of atomization is open or not.Adjust the “Air switch” of atomization. Regulate the Air & water distributing valve or clean the valve core and O-ring.
2Examine the check valve.Replace check valve.
The handpiece leaks water when not in operation
1Single-way pneumatic control water valve, valve core could not reset in time; there is some particles or size of O-ring increasedCheck single-way pneumatic control water valve and foot control, if have problems, please replace them with a new one.Replace the valve core and o-ring.
2Air release of foot control pad could not operate in time
Handpiece pressure is weak
1The rotate speed and torque are according to air pressure and air flow. These points will influence on Handpiece performance.Air release of foot control pad could not operate in timeCheck the pressure of handpiece (normal pressure for H.S handpiece is 0.22-0.24MP).Adjust diaphragm valve.
2Check the length of the tube inside the air bottle. If the length is too long, handpiece pressure will reduce a lot. Or check whether holes around air bottle is too small.Check air bottle.
3Check the regulator.Adjust the regulator or replace it.
Loosen foot control, and the handpiece will still work
1Foot control is switch to control air of handpieces. If close foot control, air for handpiece will stop, if open foot control, the handpiece will work again. If handpieces still work after close foot control, it shows that foot control could not work properly.Check foot control.
Replace foot control or components.
2Single-way pneumatic control water valve is not working very well
The air switch leak water or air
1The core is circled too far.Open the adjustor valve and to check it.Install the core correctly.
2The core and O-ring are broken.Open the adjustor valve and to check it.Replace the O-ring.
3The connector of the valve is too loose.Check the connector leak the water or air or not.Turn the connector tighten.
The 3-way syringe leads to water and air leakage
1The button of a 3-way syringe is not restored, or it is dirty, or the core and O-ring cannot work well.Check the water button of the 3-way syringe.Clean or replace the core and O-ring.
The noise or shaking is so big; the unit cannot work.
1The voltage is too low.Let the professional person check the voltage.Use the voltage stabilizer.
The built-in compressor cannot be started up.
1The wire to the power supply has fallen off.
Check the connector of power is good or not.
Connect the line correctly.
2Power line or electronic component is loose. The solenoid of the compressor can not work normally.Open the panel, and to check the connector line and component When the compressor work, the solenoid valve can not close completely.Let the professional person connect the line according to circuit diagram. Open the core of.
The built-in air compressor keeps working and can not be stopped
1The pressure switch is broken.Check the pressure switch works normally or not.Adjust or replace the pressure switch.
2Pressed drain valve leaks air.Check the pressed drain valve leakage of air or not.Avoid leaking air.
No water for scaler
1Air switch was close.Check the air switch.Open the air switch.
2No water in the bottle.Check the water volume of the water tank.Add more distilled water.
3The water adjustor of the scaler is closed.Check the water adjustor.With large water flow.
4Solenoid vale of scaler was broken.Check the solenoid valve.Replace the Solenoid Valve.
What is the maintenance procedure?


  1. Clean
  2. Lubricate
  3. Sterilize
  4. Store


  1. Clean handpiece surface
  2. Spray lubricant into handpiece backend by spray nozzle for 2-3 seconds
  3. Spray lubricant into spindle hole by spindle-type nozzle for 2-3 seconds
  4. Insert bur into handpiece and run handpiece for at least 10 seconds to spray out excessive lubricant
  5. Wipe down the exterior of handpiece with a dry tissue or towel
  6. Remove bur (Do NOT sterilize handpiece with a bur. It will shorten the lifetime of handpiece)
  7. Sterilize it by autoclave and put it into the sealed bag
  8. Store

Do not sterilize with a bur inserted!
This will be shorten the lifetime of handpiece (chuck system) and it will not give a thorough lubrication of the chuck system.

How often should I lubricate my handpieces?


  1. After each cleaning or before each sterilization.
  2. At least once per day.

Spindle hole

  1. After each cleaning or before each sterilization.
  2. At least once per week.


  1. At least once per month.
Can AG Neovo Dental couplings be thermodisinfected and sterilized?

No, the couplings cannot be autoclave sterilized.
No, the couplings cannot be cleaned and disinfected with a thermodisinfector.

What is the BEST way to take care dental handpieces?

Proper lubrication and maintenance of dental handpieces while using the recommended settings for both air and water flow are some of the best methods to keep them in working condition. NEVER wipe down with disinfectant solutions! Instead, use ALCOHOL wipes to remove debris before autoclaving. NEVER put dental handpieces into a WET environment.

Which nozzle do I use to lubricate my handpiece?
  1. Chuck
  2. Kavo type
  3. NSK series
  4. Low Speed series
Handpiece just stops working, what should I do?

You can remove it from the tube, lubricate it and check to see if all debris has been expelled from the handpiece.