Pretreatment Of Drilling Slurry For Disposal - Hilti DD 120 Manual De Instrucciones

Malfunction
The diamond core bit can't be
fitted into the chuck.
Water escapes at the water
swivel or gear housing.
Water escapes from the
chuck during operation.
The drilling system has too
much play.
10 Disposal
Most of the materials from which Hilti tools and appliances are manufactured can be recycled. The
materials must be correctly separated before they can be recycled. In many countries, your old tools,
machines or appliances can be returned to Hilti for recycling. Ask Hilti Service or your Hilti representative
for further information.
▶ Do not dispose of power tools, electronic equipment or batteries as household waste!
10.1

Pretreatment of drilling slurry for disposal

The disposal of drilling slurry directly into rivers, lakes or the sewerage system without suitable
pretreatment presents problems of an environmental nature. Ask the local public authorities for
information about current regulations.
1. Collect the drilling slurry (e.g. using a wet-type industrial vacuum extractor).
2. Allow the drilling slurry to settle and dispose of the solid material at a construction waste disposal site
(adding a flocculant can accelerate the settling process).
3. Neutralize the left-over water (alkaline, pH > 7) by adding acidic neutralizing agent or diluting it with a
large quantity of water before it is allowed to flow into the sewerage system.
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Printed: 09.08.2019 | Doc-Nr: PUB / 5069516 / 000 / 07
Possible cause
The core bit connection end or
chuck is dirty or damaged.
The water pressure is too high.
The diamond core bit isn't securely
tightened in the chuck.
The core bit connection end /
chuck is dirty.
The seal at the chuck or at the
connection end is defective.
The diamond core bit isn't securely
tightened in the chuck.
The core bit connection end /
chuck is defective.
The carriage has too much play.
Screws / bolts on the drill stand are
loose.
The drill stand is inadequately fas-
tened.
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Action to be taken
▶ Clean and grease the connec-
tion end and/or the chuck or
replace these parts.
▶ Reduce the water pressure.
▶ Tighten the diamond core bit
securely.
▶ Remove the core bit. Rotate the
diamond core bit approx. 90°
about its own axis. Refit the
diamond core bit.
▶ Clean and grease the connec-
tion end and/or the chuck.
▶ Check the seal and replace it if
necessary.
▶ Tighten the diamond core bit
securely.
▶ Remove the core bit. Rotate the
diamond core bit approx. 90°
about its own axis. Refit the
diamond core bit.
▶ Check the connection end and
chuck and replace them if
necessary.
▶ Adjust the play between the rail
and carriage. → page 34
▶ Check the security of screws
/ bolts on the drill stand and
tighten them if necessary.
▶ Fasten the drill stand more
securely.
English 37