NSK PRESTO AQUA II Manual Del Usuario página 5

4-5 Adjustment of chip air
(When water supply is used)
Check the spraying condition, and adjust the amount of chip air with the chip air adjustment knob.
Increasing the chip air results in a mist state, and decreasing it results in a straight-line state.
4-6 For Finishing Work
After completion of operation, close the main air cock.
<Use of City Water>
Close the main cock of the tap water.
5. Operational Procedures of Handpiece
1) As the chuck of the PRESTO AQUA handpiece is a push-in type, set FG
burs of ø1.6mm and push in as shown in Fig.12
Push in the bur of which the end is tapered by using the designated
bur-inserting wrench as shown in Fig.13.
2) When removing the bur, it can be removed by turning the chuck release
ring in the direction of the arrow in Fig.14.
Fig. 13
6. Replacement Procedures of Cartridge
1) Loosen the cartridge retainer by turning it, in the direction shown in Fig.15.
2) Hold the bur and pull out the cartridge toward the front. (Fig.16) At this time, the O-ring placed on the rear bearing may
remain in the body. Make sure to remove the O-ring.
Before inserting a new cartridge, clean the head interior.
3) When mounting a new cartridge, align the position of the
pipe for water and chips, and the positioning pin with the
hole of the nose hood of the cartridge and push in straight
(Fig.17).
4) Finally, tighten the cartridge retainer securely.
Fig. 16
Fig. 12
Chuck Release Ring
Fig. 14
Fig. 15
Pipe for water and chips
Positioning pin Positioning hole
Fig. 17
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7. Replacement or Cleaning Procedures of Chuck
7-1 Removal of Chuck
1) Remove the cartridge with a bur or dummy bur as it is
being installed (6.Replacement Procedures of
Cartridge).
2) Hold the rotor with two fingers as shown in Fig.18.
Mount the wrench provided on the rotor nut located on
the top of rotor shaft and turn counterclockwise
(Either side of wrench can be used.).
3) When the rotor nut is loose, push out the chuck
carefully with the dummy bur or the shank of the bur
from the back of the cartridge, the Guide-bush and the
chuck will come out (Fig.19).
CAUTION
As the Guide-bush is a very small part, be careful not to lose it.
• When cleaning the chuck, clean it sufficiently with ultrasonic cleaner etc. Blow oil spray to the inside of the rotor shaft
and clean thoroughly.
NOTICE
Remove the chuck and clean once a week.
7-2 Installation of a New Chuck
1) Apply oil thinly on the surface of the new chuck or the
chuck after cleaning, insert the test bur and push into
the rotor shaft (Fig.20).
2) Set the longer one of the guides of the guide bush on
the end of the rotor shaft first along the test bur
(Fig.21).
3) Finally insert the rotor shaft nut along the test bur, and
firmly tighten it with a wrench while holding the rotor
(Fig.22).
Fig. 18
Test bur
Chuc Guide-bush
Fig. 19
Test bur
Fig. 20
Guide-bush
Fig. 21
Fig. 22
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