NSK DynaLED Manuel D'opération page 16

2) Take out the cleaning wire from the back end of the brush holder. Insert the wire straight into the spray ports with caution. Do not forcibly insert the
wire into the port. Damaged or disoriented port could cause the spray diverge or directed away from the bur, and the cooling efficiency deteriorates.
3) After use, clean the cleaning wire. Push into the brush holder with the pointed end of the wire inward.
8. Replacing the O-rings (QD Coupling)
Worn or damaged O-ring may cause air or water to leak.
When water is found in the exhaust air or water leak from the coupled point, replace four O-rings as shown in Fig.10.
Replacement O-ring Set (4pcs) : Order Code Y900592
9. Non-Retraction Valve (QD Coupling)
To prevent oral fluids drawn into the water line, QD coupling has Non-Retraction valve. If water is
beginning to leaking from handpiece, replace non-retraction valve.
1) Remove the back-end gasket.
2) Replace Non-Retraction Valve.
O-Ring
Gasket Non-Retraction Valve
Fig. 12
Fig. 13
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