Care And Maintenance - Hilti DD 30-W Manual

6.6 Removing the core from the hole
1. While rotating it slightly, push the core breaking tool into the hole as far as it will go.
Check that the diameter of the core breaking tool (optional accessory) matches the diameter of
the core bit used.
2. Break the core by applying slight lateral pressure to the core breaking tool.
3. Pull the broken core out of the hole with the core breaking tool.
4. Use a rule to measure the hole depth actually reached.
6.7 Disposal of drilling slurry
1. Collect the drilling slurry (e.g. using a wet/dry industrial vacuum cleaner).
2. Allow the drilling slurry to settle and dispose of the solid material at a construction waste disposal site.
The addition of a flocculent may accelerate the separation process.
3. The remaining drilling water (alkaline, pH value > 7) must be neutralized by the addition of an acidic
neutralizing agent or diluted with a large volume of water before it is allowed to flow into the sewerage
system.
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 may attack the plastic parts.
Care of accessory tools (e.g. core bits) and metal parts
▶ Remove any dirt that may be adhering to the item.
▶ Protect the surfaces of accessory tools and the chuck from corrosion by rubbing these items with an oily
cloth from time to time.
▶ Always keep the connection end clean and lightly oiled.
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 machine if damaged or if its parts malfunction. Have the machine repaired by Hilti
Service immediately.
• On versions with a replaceable supply cord, the supply cord may be replaced by a trained electrical
specialist.
• After cleaning and maintenance, fit all guards or protective devices and check that they function correctly.
To help ensure safe and reliable operation, use only genuine Hilti spare parts and consumables. Spare
parts, consumables and accessories approved by Hilti for use with the product can be found at your
local Hilti Center or online at: www.hilti.group
18 English
Printed: 05.07.2019 | Doc-Nr: PUB / 5283523 / 000 / 06
2048398
*2048398*