KaVo GENTLEpower LUX Contra-angle 25 LP User manual

Technician's instructions
GENTLEpower LUX Contra-angle 25 LP - REF
1.001.2849

Distributed by:
KaVo Dental GmbH
Bismarckring 39
D-88400 Biberach
Phone [phone]
Fax [phone]
Manufacturer:
Kaltenbach & Voigt GmbH
Bismarckring 39
D-88400 Biberach
www.kavo.com

Table of contents
1User instructions .............................................................................................................................................. 4
1.1 User guide................................................................................................................................................ 4
1.1.1 Abbreviations............................................................................................................................... 4
1.1.2 Symbols....................................................................................................................................... 4
1.1.3 Target group................................................................................................................................ 4
1.1.4 Product name.............................................................................................................................. 4
2Disassembly .................................................................................................................................................... 5
2.1 Disassembly of the GENTLEpower LUX Angle Piece 25 LP.................................................................... 5
2.1.1 Disassembling the head.............................................................................................................. 5
2.1.2 Removing the insert and gear from the elbow sleeve................................................................. 6
2.1.3 Disassembling the bearing cartridge........................................................................................... 7
2.1.4 Disassembling the axle................................................................................................................ 7
2.1.5 Disassembling the insert............................................................................................................. 8
2.1.6 Disassembling the elbow sleeve................................................................................................. 8
3Assembly ....................................................................................................................................................... 10
3.1 Assembly of the GENTLEpower LUX Angle Piece 25 LP...................................................................... 10
3.1.1 Assembly instructions................................................................................................................ 10
3.1.2 Assembling the bearing cartridge.............................................................................................. 10
3.1.3 Assembling the axle.................................................................................................................. 11
3.1.4 Assembling the insert................................................................................................................ 12
3.1.5 Assembling the elbow sleeve.................................................................................................... 12
3.1.6 Assembling the head................................................................................................................. 14
4Testing............................................................................................................................................................ 16
4.1 Testing the GENTLEpower LUX Angle Piece 25 LP.............................................................................. 16
4.1.1 Test set-up................................................................................................................................. 16
4.1.2 Test instruction.......................................................................................................................... 16
Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
Table of contents
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Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
1 User instructions | 1.1 User guide
4 / 20
1 User instructions
1.1 User guide
1.1.1 Abbreviations
Abbre‐
viation
Explanation
GA
(IfU)
Instructions for use
PA (CI) Care instructions
MA (AI) Assembly instructions
TA (TI) Technician's instructions
STK
(SC)
Safety checks
IEC International Electrotechnical Commission
RA (RI) Repair instructions
EMV
(EMC)
Electromagnetic compatibility
1.1.2 Symbols
Important information for users and service technicians
1.1.3 Target group
Note
Have any repair and maintenance work on the device performed by KaVo-trained
technicians only.
1.1.4 Product name
Note
The present TI apply to the GENTLEpower LUX contra-angle handpiece 25 LP
(Mat. no. 1.001.2849).

Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
2 Disassembly | 2.1 Disassembly of the GENTLEpower LUX Angle Piece 25 LP
2 Disassembly
2.1 Disassembly of the GENTLEpower LUX Angle Piece 25 LP
2.1.1 Disassembling the head
Tool Description
Ejector (Mat. no. 1.001.3286)
Wrench (Mat. no. 1.001.3288)
Universal bit holder (Mat. no. 1.002.4577
Torque handle (Mat. no. 1.002.4578) with
100 Ncm
Circlip pliers (Mat. no. 0.411.2421)
Right Wrong
▶ Place the ejector on a level support and hold the pushbutton ⑧ with your thumb
and press it off.
▶ Remove the conical spring ⑦.
▶ Unscrew the cover ⑥ in counterclockwise direction using the wrench, the univer‐
sal bit holder and the torque handle.
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Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
2 Disassembly | 2.1 Disassembly of the GENTLEpower LUX Angle Piece 25 LP
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▶ Pull the head casing ① and the adapter ⑪ forward and out and remove the two
balls ⑨.
▶ Use the circlip pliers to twist the adapter ⑪ slightly and remove it from the head
casing ①, then remove the two springs ⑩.
▶ Slide the spray insert ③ out of the head casing ①.
▶ Remove the drive axle ⑤ and spring washer ④ from the spray insert ③.
▶ Remove two O-rings ②.
2.1.2 Removing the insert and gear from the elbow sleeve
Tool Name
Assembly pliers (Mat. no. 0.411.3921)
Wrench (Mat. no. 0.411.1881)
Universal bit holder (Mat. no. 1.002.4577)
Torque handle (Mat. no. 1.003.1524)
180 Ncm
Clamping sleeve (Mat. no. 0.411.4451)
▶ Take hold of the elbow sleeve ① with the circlip pliers and turn the wrench, uni‐
versal bit holder and torque handle anticlockwise to unscrew the threaded ring ⑤.
▶ Slide the adapter sleeve into the insert ④ and push the spring pin into place.
▶ Pull the insert ④ out of the elbow sleeve ① and remove the adapter sleeve.
▶ Push the bearing cartridge ② and axle ③ right back and out.
▶ Remove the axle ③ from the bearing insert ②.

Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
2 Disassembly | 2.1 Disassembly of the GENTLEpower LUX Angle Piece 25 LP
2.1.3 Disassembling the bearing cartridge
Tool Name
Tweezers (Mat. no. 0.308.1410)
▶ Pull the intermediate drive ① out of the bearing cartridge ④.
▶ Use tweezers to remove O-ring ② and O-ring ③.
2.1.4 Disassembling the axle
Tool Description
Insert for spur gear assembly tool
Mount for spur gear assembly tool
Note
The spur gear assembly tool (Mat. no. 1.002.3898) comprises the insert, the mount
and the reducing shank.
▶ Push the driver axle ⑥ into the insert, slide the mount over it and screw to the in‐
sert.
▶ Carefully pull the spur gear ① out of the system bearing ③ and take out the three
balls ②.
▶ Unscrew the mount from the insert and remove the system bearing ③, washer ④
and spring ⑤ from the driver axle ⑥.
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Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
2 Disassembly | 2.1 Disassembly of the GENTLEpower LUX Angle Piece 25 LP
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2.1.5 Disassembling the insert
Tool Name
Wrench (Mat. no. 1.002.0321)
▶ Take out the slide ② and pressure spring ①.
▶ Unscrew the filter ③ with the wrench and remove the O-ring ④.
2.1.6 Disassembling the elbow sleeve
Tool Name
Puller (Mat. no. 1.002.7470)
Note
Take care not to damage the fibre-optic conductor when disassembling the elbow
sleeve.
▶ Use a hot-air blower to heat up the glued joint on the fibre-optic conductor ⑥ and
the glued joints on the elbow sleeve ⑧.
▶ Insert the puller into the front of the spray sleeve ⑦, force the tension tabs apart
with the swivel and slowly screw in the threaded spindle of the puller to loosen
and extract the spray sleeve ⑦.
▶ Screw back the threaded spindle of the puller and remove the puller.

Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
2 Disassembly | 2.1 Disassembly of the GENTLEpower LUX Angle Piece 25 LP
▶ Pull the fibre-optic conductor ④, spray pipe ② and spray pipe ③ forward and out
of the elbow sleeve ⑨.
▶ Remove the two O-rings ① and the two O-rings ⑤.
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Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
3 Assembly | 3.1 Assembly of the GENTLEpower LUX Angle Piece 25 LP
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3 Assembly
3.1 Assembly of the GENTLEpower LUX Angle Piece 25 LP
3.1.1 Assembly instructions
Material numbers for spare parts are listed in the separate spare parts sheet.
See also:
2Spare parts list for the GENTLEpower LUX Angle Piece 25 LP
Requirement
All parts must be cleaned thoroughly.
Glued joints must be clean; there must be no traces of grease or adhesive residue.
Check air and water hoses for free passage.
Note
Once assembled, the contra-angle handpiece has to be sprayed thoroughly with
KAVOspray.
3.1.2 Assembling the bearing cartridge
Tool Name
Mounting device A (Mat. no. 1.002.3804)
Mounting device B (Mat. no. 1.002.3802)
▶ Apply a thin layer of grease to the O-ring ③, insert into the groove on mounting
device A, pull back the slide on mounting device A and hold in place.
▶ Insert mounting device A into the drilled hole on the bearing sleeve ④ and slide
the O-ring ③ into the first groove on the bearing sleeve.
▶ Apply a thin layer of grease to the O-ring ②, insert into the groove on mounting
device B, pull back the slide on mounting device B and hold in place.
▶ Insert mounting device B into the drilled hole on the bearing sleeve ④ and slide
the O-ring ② into the second groove on the bearing sleeve.
▶ Push the intermediate drive ① into the bearing sleeve ④ as far as the stop.

Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
3 Assembly | 3.1 Assembly of the GENTLEpower LUX Angle Piece 25 LP
3.1.3 Assembling the axle
Tool Description
Insert for spur gear assembly tool
Mount for spur gear assembly tool
Spur gear assembly tool reducing shank
Note
The spur gear assembly tool (Mat. no. 1.002.3898) comprises the insert, the mount
and the reducing shank.
▶ Place the spring ⑤ on the driver axle ⑥ and push into the insert.
▶ Push the reducing shank through the mount and attach the system bearing ③ and
washer ④ to the reducing shank.
▶ Screw the mount to the insert and take off the reducing shank.
▶ Place the spur gear ① on the driver axle ⑥ (make sure that the ball drilled holes
and the surfaces line up).
▶ Grease the ball drilled holes and insert three balls ②.
▶ Push the spur gear ① into the system bearing ③.
▶ Unscrew the mount from the insert.
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Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
3 Assembly | 3.1 Assembly of the GENTLEpower LUX Angle Piece 25 LP
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3.1.4 Assembling the insert
Tool Name
Wrench (Mat. no. 1.002.0321)
▶ Insert the slide ② and pressure spring ①.
▶ Place the O-ring ④ on the filter ③ and screw in all the way using the wrench.
3.1.5 Assembling the elbow sleeve
Tool Description
Loctite 648 adhesive (Mat. no. 0.359.2061
Wrench (Mat. no. 0.411.1881)
Universal bit holder (Mat. no. 1.002.4577
Torque handle (Mat. no. 1.003.1524) with
180 Ncm

Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
3 Assembly | 3.1 Assembly of the GENTLEpower LUX Angle Piece 25 LP
Tool Description
Loctite 306 adhesive (Mat. no. 0.359.2044
Note
Do not glue spray pipes when gluing the fibre-optic conductor.
▶ Fit a new O-ring ① to the top of spray pipe ② and a new O-ring ① to the top of
spray pipe ③.
▶ Fit a new O-ring ⑦ to the bottom of spray pipe ② and a new O-ring ⑦ to the bot‐
tom of spray pipe ③.
▶ Push the head casing ⑤ into the conical sleeve ⑧ to insert spray pipe ② and
spray pipe ③ into the head casing ⑤.
▶ Insert the fibre-optic bundle ④ into the conical sleeve ⑧ and slide over spray pipe
②, spray pipe ③, and head casing⑤.
▶ Apply a layer of Loctite 648 to the glued joints ⑨ on the elbow sleeve.
▶ Attach the conical sleeve ⑧ to the elbow sleeve ⑩ and wipe off any excess adhe‐
sive.
▶ Carefully push the axle ⑫, bearing cartridge ⑪ and insert ⑬ all the way into the
elbow sleeve ⑩.
▶ Screw the threaded ring ⑭ into the elbow sleeve ⑩ and tighten to 180 Ncm with
the wrench, the universal bit holder and the torque handle.
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Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
3 Assembly | 3.1 Assembly of the GENTLEpower LUX Angle Piece 25 LP
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▶ Place the contra-angle handpiece in a hot-air furnace and allow the adhesive 30
minutes
to set at 120 oC.
▶ Remove the head casing ⑤ from the sleeve ⑧ again.
▶ Use Loctite 306 adhesive to fix the inside of the spray sleeve ⑧ to position ⑥ and
the fibre-optic bundle ④ making sure that the fibre-optic bundle is situated such as
to be flush at the front. Remove any residual adhesive from the end of the fibre-
optic bundle.
▶ Place the angle piece in a hot-air furnace and allow the adhesive to set for 30 mi‐
nutes at
120 oC.
3.1.6 Assembling the head
Tool Description
Wrench (Mat. no. 1.001.3288)
Universal bit holder (Mat. no. 1.002.4577
Torque handle (Mat. no. 1.002.4578) with
100 Ncm
Circlip pliers (Mat. no. 0.411.2421)
▶ Fit one O-ring ② in the groove on the spray insert ③ and one in the attachment of
the spray insert ③.
▶ Insert the spring washer ④ and drive axle ⑤ into the spray insert ③.
▶ Insert the spray insert ③ into the head casing ①.
▶ Screw the cover ⑥ into the head casing ① and tighten with a torque of 100 Ncm
with the wrench, the universal bit holder and the torque handle.

Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
3 Assembly | 3.1 Assembly of the GENTLEpower LUX Angle Piece 25 LP
▶ Insert the conical spring ⑦ with the larger diameter in the direction of the pushbut‐
ton ⑧ in the head casing ⑤ and push the pushbutton ⑧ down perpendicularly up
to the snap-in connection.
▶ Insert the two springs ⑩ with their curvature upwards into the milled edges on the
adapter ⑪.
▶ Use the circlip pliers to slide the adapter ⑪ into the head casing ①, lining up the
drilled holes for the balls at the same time.
▶ Insert the two balls ⑨ into the drilled holes for the balls in the head casing ①.
▶ Pull spray pipe ⑫ and spray pipe ⑬ out slightly and insert the head casing ① all
the way. Make sure that spray pipe ⑫ and spray pipe ⑬ are inserted all the way
into the head casing ①.
▶ Push the head casing ① into the sleeve ⑭ until it snaps into place.
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Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
4 Testing | 4.1 Testing the GENTLEpower LUX Angle Piece 25 LP
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4 Testing
4.1 Testing the GENTLEpower LUX Angle Piece 25 LP
4.1.1 Test set-up
①Test device 2182 KL (Mat. no.
0.411.8540)
②Leakage air hose
③Motor hose ④Pressure gauge (Mat. no. 1.003.1050)
⑤Motor
4.1.2 Test instruction
Note
The following evidence must be documented:
- Customer's address and repair dates
- Material number or sales number of the product
- Serial number of the product
- Spare parts material numbers
- Name, date, signature or personnel number of repair/test engineer
Requirement
- Amount of cooling air: 28 ± 4 Nl/min
- Drive speed: max. 40,000 rpm
The pressures are set on the test device.
Test equipment Name
Test drill (Mat. no. 0.410.1702)

Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
4 Testing | 4.1 Testing the GENTLEpower LUX Angle Piece 25 LP
Test equipment Name
Retention force gauge (Mat. no.
0.411.4601)
Push-button tester (Mat. no. 1.003.3571)
Spray test drill (Mat. no. 0.410.1933)
Meter tube (Mat. no. 0.411.4441)
Testing Test equipment Procedure
Check repair documents and ID Check product markings, type and
serial number.
Carry out a visual inspection Carry out a general visual inspection
of external condition.
There should be no visual evidence
of damage.
There should be no spots on the fi‐
bre-optic bundle.
Check instrumentation connection ▪ Motor Connect the angle piece to the mo‐
tor coupling and pull off. The con‐
nection should be made, lock and
disconnect with ease.
Check chuck ▪ Test drill Insert the test drill into the chuck
and pull out.
There are no obstructions to inser‐
tion and removal.
▪ Retention force gauge Use a retention force gauge to
measure the axial retention force of
the chuck.
Axial retention force: at least 17 N
Check pushbutton ▪ Pushbutton tester Insert the pushbutton tester into the
chuck system and push it as far as
the stop.
The pushbutton must remain de‐
pressed.
Check running characteristics ▪ Motor Run the angle piece under test con‐
ditions CW and CCW with radial and
axial load.
There should be no noticeable vi‐
brations or running noise.
Under axial load, the adapter does
not graze the pushbutton and the
pushbutton does not heat up.
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Technician's instructions GENTLEpower LUX Contra-angle 25 LP - REF 1.001.2849
4 Testing | 4.1 Testing the GENTLEpower LUX Angle Piece 25 LP
18 / 20
Testing Test equipment Procedure
Check concentricity ▪ Test drill Run the angle piece with test drill
off-load at 200,000 rpm.
There should be no noticeable vi‐
brations or running noise.
Check power consumption ▪ Test drill Measure the power consumption
under test conditions with head and
test drill.
Power consumption: max. 150 mA
Check seals ▪ Leakage air hose Pressurize the media chamber with
compressed air
(2 bar) and pressure-test the spray
drilled hole for 15 seconds.
The compressed air must remain
constant.
Run a spray test ▪ Spray test drill Carry out a visual inspection of the
spray mist.
The spray jets should hit the ball of
the spray test drill.
▪ Test device Measure air and water quantity un‐
der test conditions.
Air quantity: at least 2.5 Nl/min.
Water quantity: at least 50 ml/min.

1.007.3086 · bd · 20160122 - 03 · en