3TECH TR-720L Guide D'utilisation page 22

Proper bur
– Do not use bent, damaged, or non-concentric burs. Use burs of ISO-standard ø 1.59-1.60mm.
Change of bur
Fig. 8
– Press-cards type (push button bur-exchange type)
– When unloading the bur, press the centre of the head hard with your thumb, whilst simultaneously taking out the bur
with the other hand, as shown in picture
– When loading the bur, insert it into importing parts of the chuck hole (about 1-2mm). Then press the centre of the head
hard with your thumb, whilst simultaneously pushing the bur into the end with your other hand.
Replacing the O-rings (quick coupling)
Worn or damaged O-rings 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.
Replacement O-ring Set
22
Fig. 9.1
Non
T
ning to
–
–
Clea
–
–
–
Fig. 8
Clea
O-rings Wipe c
oil.
Use on
Fig. 9.1