Hilti DD 30-W Original Operating Instructions page 41

5.2.4 Fitting the water collector holder
Note
Drilling is permissible only under the following conditions:
The supplied water collector holder is fitted and adjusted to match the length of the core bit used.
A core bit sealing ring that matches the diameter of the core bit must be fitted in the water collector
holder.
1. Unplug the supply cord from the power outlet.
2. Push the water collector holder into the opening provided at the front of the machine until it engages with
a click.
3. Use the slider to set the correct length range for the core bit used. Set the slider to the 150 position for
core bits with a length of up to 150 mm and set it to 300 for core bits with a length of 300 mm or 600 mm.
5.2.5 Fitting or replacing the sealing ring
WARNING
Danger of electric shock! Use of the wrong sealing ring when drilling overhead may cause water to
find its way into the interior of the diamond core drilling machine.
▶ Always use a sealing ring of the same diameter as the core bit.
1. Disconnect the supply cord plug from the power outlet.
2. Fit the sealing ring into the groove in the water collector and push the sealing ring down until it is heard
to engage.
3. To remove the sealing ring, turn it counterclockwise and pull it up out of the water collector.
5.2.6 Fitting the core bit
WARNING
Risk of injury caused by flying fragments or debris. Use of cracked, broken or badly worn core bits
may result in flying fragments (parts of the workpiece or broken core bit) presenting a risk of injury to
the operator or bystanders, even outside the working area.
▶ Check the core bit for cracks, breakage, heavy wear or other damage each time before use and
replace the core bit if necessary.
Note
Diamond core bits must be replaced when the cutting performance and/or rate of drilling progress
drops significantly. This generally is the case when the segments reach a height of less than 2 mm.
Note
Spraying the chuck with Hilti lubricant spray at regular intervals makes it easier to fit the core bit.
1. Unplug the supply cord from the power outlet.
2. Open the chuck by pulling the chuck locking lever upwards as far as it will go.
Note
Check that the core bit connection end and the chuck are clean and undamaged.
3. Tip the water collector about its mounting axis as far as it will go.
4. Guide the cutting edge of the core bit into the sealing ring in the water collector from above.
5. Align the connection end of the core bit with the corresponding openings and insert it into the chuck.
6. Turn the core bit as far as it will go while applying light pressure.
7. Secure the core bit by closing the chuck locking lever.
5.2.7 Connecting the vacuum removal system
1. Make sure that the suction hose from the all-purpose vacuum cleaner is securely connected to the core
drilling machine's water collection hose. Use a hose adapter for this purpose.
2. Connect the all-purpose vacuum cleaner suction hose to the vacuum cleaner.
Printed: 20.12.2016 | Doc-Nr: PUB / 5283477 / 000 / 03
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