# Maintaining the Bit Assembly

## Extending the Bit-stroke

To change the Bit, the extension of the Bit-stroke is required. There are two different ways to extend the Bit-stroke.

1. The rotary switch on the Atlas Copco screw feeder is used to enable the feeder's manual mode, which is then activated through the feeder's Human Machine Interface (HMI). In this way, the extension of the Bit command must be set in the HMI of the feeder.

2. In automatic mode, the Bit-stroke gets activated. In this way, the extension of the Bit command must be given through the client's line Programmable Logic Controller (PLC).

## Removing the Bit Assembly

1. Remove the Feeding Head by pulling the Quick-change Coupling backward.

2. Pull the Bit Quick-change Coupling forward.

3. The Quick-change Coupling remains in an open position until the Bit Adaptor is pushed in again.

4. The Bit Assembly will pop out as soon the Bit Quick-change Coupling is pulled forward.

## Cleaning and Checking the Bit Assembly

1. Clean the Bit Assembly and remove the residuals, if any.

2. Check the Bit Assembly completely. In case of any defect, the respective part must be exchanged.

3. Reinstall the Bit Assembly if there is no defect.

4. Insert the Bit Assembly into the sleeve with a slight twist until the toothing engages. The Bit Quick-change Coupling gets back to its position with a click sound.

## Applies to: