7
If the collet cannot be loosened by hand
using the Collet Wrench, additional torque
may be required. To use the Collet Wrench,
place the triangular cutout in the wrench
over the collet and turn counterclockwise to
loosen and clockwise to tighten the collet. If
more torque is required, hold the handpiece
with the Collet Wrench secure on the collet,
and tap the wrench with a solid tool (see
fig. 3a) in a counterclockwise direction. This
procedure will loosen the collet, which can
then be removed by hand.
If the collet is so tight that the above proce-
dure will not loosen it, then remove the Head
Assembly from the Motor Assembly. This can
be done by grasping the Motor Connecting
Ring (see fig. 1) and pulling upward. Insert
the Chuck Joint Wrench (see fig. 3b) into the
Nylon Coupler (#510-0151), hold the Head
Assembly and Wrench securely in one hand,
and with the Collet Wrench in place on the
collet, loosen in a counterclockwise direc-
tion (for parts drawing, refer to page 11).
After a collet is replaced, be sure that the
Collet Release Ring is rotated to its full “S”
position and that the collet rotates freely
when turned by hand. If the collet does not
rotate freely, it is not fully seated in the Head
Assembly, and you must repeat the remov-
al-replacement procedure.
Fig. 3a
Chuck
Joint
Wrench
Tighten
Loosen
Collet
Wrench
R
Fig. 3b
