# Release the spindle

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

- Torx wrench

- Allen key

- Pin spanner

- Wrench

- Fork-shaped tool

1. Fasten the drill in a vise with rubber pads, with the air logic unit upward and the drill handle to the right. Remove the spindle guard.

2. Note the position of the feed cassette. The markings, on the cassette end closest to the spindle, indicate the actual feed rate.

3. Remove the cassette lock, the cassette, the five screws and two washers. Use a Torx wrench on the screw of the cassette lock and allen key on the other four screws.

4. Pull out the clutch.

5. Put the pin spanner in the original position of the clutch, with the four pin facing down. Turn the spanner until the pin locks into position.

6. Note the position of the spindle:

   1. If the spindle is in starting position – Turn the pin spanner counterclockwise with a wrench until the spindle is released.

   2. If the spindle is in finishing drilling position – Turn the pin spanner clockwise with a wrench until the spindle is released.

7. Pull out the pin spanner.

8. Install the clutch in the original position.

9. Put the feed cassette in the original position making sure that the markings on the cassette end closest to the spindle indicate the required feed rate.

10. If you cannot install the cassette easily, turn its splines with the fork-shaped tool to align them.

11. Install the washers and the four screws in the original position. Tighten the screws. Install the lock and the lock screw. Tighten the screw.

12. Put the spindle guard back in the original position and secure it.

13. Connect the air hose to the nipple. 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 spindle must stop immediately.

    3. Pull the emergency stop button to reset it. The motor must not restart.

    4. Disconnect the air hose.

Before using the tool, test the starting position valve and the depth valve to ensure previous malfunction.

Step 1 – Make a visible test. Remove the valves from the tool. Turn the valves clockwise with the fork-shaped tool. Compress the valves and see if the spring is OK.

Step 2 – See section “Leak test”.