# Changing the Tool

The dust protection cap (4) largely prevents the penetration of drilling dust into the tool holder during operation. When inserting the tool, make sure that the dust protection cap (4) does not become damaged.

- Replace a damaged dust protection cap immediately. It is recommended that you have use an after-sales service for this.

## Changing the Tool SDS plus

### Inserting the SDS plus Application Tool (see figure D)

The SDS plus drill chuck enables you to change the application tool easily and conveniently without needing to use additional tools.

- Clean and lightly grease the shank of the application tool.
- Insert the application tool into the tool holder (3) while turning it until it locks automatically.
- Check that it is locked by pulling on the tool.

As a requirement of the system, the SDS plus application tool can move freely. This causes a certain radial run-out at no-load, which has no effect on the accuracy of the drill hole, as the drill bit centres itself upon drilling.

### Removing the SDS plus Application Tool (see figure E)

- Push the locking sleeve (5) back and remove the application tool.

## Changing the keyless quick-change chuck

### Inserting the Application Tool (see figure F)

Note: Application tools that do not have SDS plus must not be used for hammer drilling or chiselling. Tools without SDS plus and their drill chucks are damaged by hammer drilling or chiselling.

- Insert the keyless quick-change chuck (1) with integrated impact stop.

Note: Only use the keyless quick-change chuck with integrated impact stop specifically designed for the GBH 18V-34 CF. Using this drill chuck is the only way to ensure that the pneumatic impact mechanism of the rotary hammer does not damage the application tools.

- Hold the retaining ring (22) of the keyless quick-change chuck firmly in place. Open the tool holder by turning the front sleeve (21) until the tool can be inserted. Hold the retaining ring (22) in place and firmly tighten the front sleeve (21) by turning it in the direction of the arrow until you hear it click into place.
- Check that it is seated securely by pulling on the tool.

Note: If the tool holder was unscrewed all the way, a scraping sound may be heard while retightening the tool holder and it may not fully tighten.

In this case, turn the front sleeve (21) in the opposite direction to the arrow by one full turn. This will allow the tool holder to be fully tightened.

- Turn the combi switch (7) to the "drilling" position.

### Removing the application tool (see figure G)

- Hold the retaining ring (22) of the keyless quick-change chuck firmly in place. Open the tool holder by turning the front sleeve (21) in the direction of the arrow until the tool can be removed.