Hilti DD 150-U Mode D'emploi page 29

Malfunction
The rate of drilling progress
decreases.
The hand wheel can be
turned without resistance.
The diamond core bit cannot
be fitted into the chuck.
Water escapes at the water
swivel or gear housing.
Water escapes at the chuck
during operation.
No water is flowing.
The drilling system has too
much play.
9 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!
*434950*
Printed: 09.08.2019 | Doc-Nr: PUB / 5069547 / 000 / 06
Possible cause
The water flow rate is too high.
The water flow rate is too low.
The carriage lock is engaged.
Dust is hindering drilling progress.
The shear pin is broken.
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 filter or water flow indicator is
blocked.
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
▶ Reduce the water flow rate
by adjusting the water flow
regulator.
▶ Check the water supply to the
diamond core bit respectively
increase the water flow rate by
adjusting the water regulator.
▶ Release the carriage locking
mechanism.
▶ Use a suitable dust removal
system.
▶ Replace the shear pin.
▶ 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 diamond 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.
▶ Remove the filter or water flow
indicator and flush it through.
▶ Tighten the diamond core bit
securely.
▶ Remove the diamond 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 13
▶ Check the security of screws
/ bolts on the drill stand and
tighten them if necessary.
▶ Fasten the drill stand more
securely.
English 21