# Changing the speed

WARNING

Make sure that the air supply is not connected.

CAUTION

Wear gloves to avoid personal injury because of sharp cutting edges. Only experienced maintenance personnel can assemble or disassemble the product.

Required tools

- Vise

- Allen key

1. Fasten the drill in a vise with rubber pads, with the drill handle upward and the air logic unit to the left.

2. Remove the motor valve using an Allen key.

3. Pull up the motor housing and remove it.

   Make sure that the motor does not fall out of the housing.

4. Loosen the gear wheel using an Allen key.

   Only for a high-speed drill: Remove the spline connection.

5. Remove the cover with the split gear inside using an Allen key.

6. Gently push the split gear forward and remove it from the cover.

7. Change position of the bevel gear to the shaft on the opposite side of the split gear.

8. Turn the split gear in a suitable position.

   The markings closest to the motor housing indicate the actual speed.

9. Put the split gear back into the cover.

10. Put the cover with the split gear back into original position and tighten the cover with screws using an Allen key.

11. Tighten the gear wheel with screw using an Allen key. If you cannot install the screw easily, turn the spindle to align the splines.

    Only for a high-speed drill: Put the spline connection back into position.

12. Put the motor housing back into original position.

13. Put the motor valve back into original position and secure it with screws using an Allen key.

Before operating the drill, do a functional test of the emergency stop button:

1. Push the start button.

2. Push the emergency stop button so that it locks in position. The air supply to the motor switches off and the spindle stops.

3. Disconnect the air hose.

4. Pull the emergency stop button to reset it.

5. Reconnect the air hose.