Hilti DD 150-U Mode D'emploi page 46

6.3 Removing a diamond core bit from a BI+ chuck
CAUTION
Risk of injury when changing the tool! The tool becomes hot as a result of use. It may have sharp edges.
▶ Always wear protective gloves when changing the tool.
1. Lock the carriage on the rail with the carriage lock. Check to ensure that it is securely fastened.
2. Open the chuck by turning it in the direction of the "Open brackets" symbol.
3. Pull the sleeve on the chuck in the direction of the arrow towards the machine. This releases the core bit.
4. Remove the core bit.
6.4 Removing the diamond core bit with an alternative type of chuck
CAUTION
Risk of injury when changing the tool! The tool becomes hot as a result of use. It may have sharp edges.
▶ Always wear protective gloves when changing the tool.
1. Lock the drive spindle with a suitable open-end wrench.
2. Use a suitable open-end wrench to remove the core bit.
6.5 Selecting the speed
CAUTION
Risk of wear and tear Risk of damage to the gearing
▶ Do not attempt to change gear while the machine is running. Wait until the arbor comes to a complete
stop.
▶ While using one hand to turn the core bit, set the switch to the recommended setting.
6.6 Portable residual current device (PRCD)
An isolating transformer must be used for diamond core drilling machines without PRCD.
1. Plug the diamond core drilling machine's supply cord into a grounded socket outlet.
2. Press the "I" or "RESET" button on the PRCD.
➥ The indicator lights up.
3. Press the "0" or "TEST" button on the PRCD.
➥ The indicator goes out.
WARNING
Risk of injury due to electric shock! Do not continue operating the diamond core drilling machine if the
indicator on the ground fault circuit interrupter does not go out when the 0 or the TEST button is pressed.
▶ Have your diamond core drilling machine repaired by Hilti Service.
4. Press the "I" or "RESET" button on the PRCD.
➥ The indicator lights up.
6.7 Hand-guided dry drilling
Allowing dust to build up in quantity inside the core bit can cause imbalance.
▶ Remove the dust from the core bit.
38 English
Printed: 09.08.2019 | Doc-Nr: PUB / 5069546 / 000 / 09
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