Hilti AG 125-19SE Mode D'emploi page 33

The optional Kwik lock nut can be used instead of the standard clamping nut. Grinding wheels can
then be changed without the need for additional tools.
1. Disconnect the supply cord plug from the power outlet.
2. Clean the clamping flange and the quick-release clamping nut.
3. Check that the O-ring is in place in the clamping flange and that it is undamaged.
Result
The O-ring is damaged.
There is no O-ring in the clamping flange.
▶ Fit a new clamping flange with O-ring.
4. Fit the clamping flange onto the drive spindle.
5. Fit the grinding wheel.
6. Screw on the Kwik lock nut until it is seated against the grinding wheel.
◁ The name Kwik lock should be visible when the nut is screwed on.
7. Press the spindle lockbutton and hold it in this position.
8. Firmly turn the grinding wheel clockwise by hand until the Kwik lock nut is tightened securely and then
release the spindle lock button.
6.4.4 Removing a grinding wheel secured with a Kwik lock nut
1. Disconnect the supply cord plug from the power outlet.
CAUTION
Risk of breakage and irreparable damage. If the spindle lockbutton is pressed while the spindle is rotating,
this may cause the accessory tool to work loose or detach from the power tool.
▶ Press the spindle lockbutton only when the spindle has stopped rotating.
2. Press the spindle lockbutton and hold it in this position.
3. Release the Kwik lock nut by turning it counterclockwise by hand.
4. If the Kwik lock nut cannot be released by turning it by hand, use a pin wrench to turn the nut in a
counterclockwise direction.
Never use a pipe wrench! A pipe wrench could damage the Kwik lock nut.
5. Release the spindle lock button and remove the grinding wheel.
6.5 Fitting the core bit
1. Disconnect the mains plug from the power outlet.
2. Fit the side handle. → page 25
3. Install the guard. → page 25
4. Place the core bit in position and tighten it hand-tight.
5. Press the spindle lockbutton and hold it in this position.
6. Tighten the core bit with a suitable open-end wrench.
7. Then release the spindle lockbutton and remove the open-end wrench.
6.6 Fitting the wire brush
1. Disconnect the mains plug from the power outlet.
2. Fit the side handle. → page 25
3. Install the guard. → page 25
4. Place the wire brush in position and tighten it hand-tight.
5. Press the spindle lockbutton and hold it in this position.
6. Tighten the wire brush with a suitable open-end wrench.
7. Then release the spindle lockbutton and remove the open-end wrench.
6.7 Fitting the abrasive resin-fiber disc
1. Disconnect the mains plug from the power outlet.
2. Fit the side handle. → page 25
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