KaVo GENTLEsilence LUX 6500B User Manual

KaVo GENTLEsilence LUX 6500B – PB (Pushbutton)
Repair Procedure
Tools needed to properly repair this handpiece:
1. Kavo Coupler
2. Kavo Back Cap Removal Tool (10129)
3. Auto-Chuck Protector Punch (00024A)
4. Round Tip Punch (00024R)
The KaVo 6500B is a relatively new handpiece. It came out in 2005 and you should
now start seeing them out of Manufacturers warranty. Lube is required on this
handpiece.
STEP 1
Try to determine the problem before opening the handpiece. Insert a high speed bur,
checking that it inserts smoothly and tightens securely. Twist the bur manually to feel
how smoothly it turns. Attach it to your KaVo coupler and run the handpiece (if you can).
Check that air pressure is at 40-45 p.s.i.. Listen for the appropriate pitch at full speed
and for a smooth rundown. Check the water spray – it should be a fine mist. Attempt to
cut a shell to test the torque. Disassemble the handpiece following the instructions
below.
DISASSEMBLY
STEP 2
Using the Kavo PB back cap removal tool (10129), twist in a
counterclockwise direction to unscrew the back cap and remove the
turbine assembly.
TIP: Sometimes the cap is very tight. Be very careful not to let the tool slip and strip or
scratch the back cap.
STEP 3
Place the turbine in your
workblock. As pictured, be sure
to insert the rear bearing of the
assembly into the hole just
above and to the right of Hole
#2. This hole allows the bearing
to fit in nicely while providing
good support for the impeller. Don’t worry about the fragile impeller, on the OEM KaVo
6500 turbine, we must replace it any way.

KaVo GENTLEsilence LUX 6500B Specifications

General

Model	GENTLEsilence LUX 6500B
Speed	up to 40, 000 rpm
Autoclavable	yes
Type	Dental handpiece
Light	LED light
Spray	Triple spray
Light Intensity	25, 000 Lux

Summary

KaVo 6500B Repair Procedure

Initial Assessment

Assess handpiece function, air pressure, and water spray before disassembly.

Disassembly

Unscrew the back cap using the removal tool to access the turbine assembly.

Turbine Removal

Remove the turbine assembly from the handpiece using a workblock.

Spindle Extraction

Carefully press the spindle out of the bearings without breaking them.

Component Identification

Identify re-usable spindle/washer and junk bearing/impeller set.

Assembly for OEM Spindle

Bearing and Spindle Assembly

Press the spindle into the bearing, ensuring the shield side is up on the workblock.

Impeller and Spindle Assembly

Press the spindle into the impeller, aligning the beveled side down.

Bearing/Impeller/Spindle Assembly

Insert the assembled spindle/bearing/impeller into the bearing on the workblock.

Front Thrust Washer Assembly

Place the thrust washer onto the spindle and press the assembly into it.

Final Turbine Assembly

Install o-rings and wavy washers into the head and back cap.

Assembly for After-Market Spindle

Bearing and Spindle Assembly

Place bearing into workblock, then press spindle into the bearing.

Bearing and Impeller Assembly

Place second bearing into workblock, then press spindle into the bearing.

Turbine and Washer Assembly

Place thrust washer onto spindle, then press turbine assembly over the washer.

Final Assembly and O-rings

Install new o-rings and wavy washers into the head and back cap.