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6.7
Switching off the diamond core drilling machine
WARNING
Risk of personal injury and material damage The diamond core bit fills with water during overhead drilling.
The diamond core drilling machine may become damaged and the risk of electric shock is increased.
▶ As a first step, carefully allow the water to drain away after completing overhead drilling. This is done
by disconnecting the water supply from the water flow regulator and draining the water by opening the
water flow regulator. Do not allow the water to run over the motor and cover.
1. Connect the water flow regulator to the diamond core drilling machine.
2. Remove the diamond core bit from the hole.
3. Switch off the diamond core drilling machine.
4. Lock the carriage on the rail with the carriage lock.
5. Switch off the wet-type industrial vacuum cleaner (if used).
6.8
DD-HD 30: Detaching the diamond core drilling machine from the drill stand
1. Lock the carriage on the rail with the carriage lock.
2. Remove the supply cord from the cord guide on the carriage cover.
CAUTION
Risk of personal injury and material damage Hazard presented by a falling diamond core drilling machine.
▶ Hold the core drilling machine tightly with one hand by the carrying handle.
3. Loosen the eccentric pin for locking the tool on the carriage.
4. Pull out the eccentric pin.
5. Remove the diamond core drilling machine from carriage.
6. Push the eccentric pin into the carriage as far as it will go.
7
Care and maintenance
WARNING
Electric shock hazard! Attempting care and maintenance with the supply cord connected to a power outlet
can lead to severe injury and burns.
▶ Always unplug the supply cord before carrying out care and maintenance tasks.
Care
•
Carefully remove any dirt that may be adhering to surfaces.
•
Clean the cooling air slots carefully with a dry brush.
•
Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as
these can attack the plastic parts.
•
Always keep the connection end and the chuck of the core drilling machine clean and lightly greased.
•
Clean the outside of the appliance at regular intervals with a slightly damp cloth. Do not use a spray,
pressure jet washer or running water for cleaning.
Maintenance
WARNING
Danger of electric shock! Improper repairs to electrical components may lead to serious injuries including
burns.
▶ Repairs to the electrical section of the tool or appliance may be carried out only by trained electrical
specialists.
•
Check all visible parts and controls for signs of damage at regular intervals and make sure that they all
function correctly.
•
Do not operate the product if signs of damage are found or if parts malfunction. Have it repaired
immediately by Hilti Service.
•
After cleaning and maintenance, fit all guards or protective devices and check that they function correctly.
20
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