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*434951*
434951
English
37
Trouble or fault
Possible cause
Action to be taken
The diamond core bit doesn’t
rotate.
The diamond core bit has become
jammed in the base material.
▶
Use an open-end wrench to
release the diamond core bit:
Disconnect the supply cord plug
from the power outlet. Grip the
diamond core bit with a suitable
open-end wrench close to the
connection end and release the
diamond core bit by rotating it.
Stand-guided drilling
▶
Turn the handwheel and try to
release the diamond core bit
by moving the carriage up and
down.
The gearing is defective.
▶
Have the machine repaired by
Hilti Service.
The drilling speed is decreas-
ing.
The diamond core bit is polished.
▶
Sharpen the diamond core bit
by drilling into a sharpening
plate.
Wrong core bit specification for the
base material.
▶
Select a more suitable diamond
core bit specification.
The water flow rate is too high.
▶
Reduce the water flow rate
by adjusting the water flow
regulator.
The core is stuck in the diamond
core bit.
▶
Remove the core.
Maximum drilling depth has been
reached.
▶
Remove the core and use a core
bit extension.
The diamond core bit is defective.
▶
Check the diamond core bit
for damage and replace it if
necessary.
Safety clutch disengages too soon
or is slipping.
▶
Have the machine repaired by
Hilti Service.
The brake has been applied.
▶
Release the brake.
The water flow rate is too low.
▶
Check the water supply to
the diamond core bit or,
respectively, increase the water
flow by adjusting the water flow
regulator.
High steel content (indicated by
clear water containing metal cut-
tings).
▶
Select a more suitable diamond
core bit specification.
The handwheel can be turned
without resistance.
The split pin is broken.
▶
Replace the split pin.
Water escapes at the water
swivel or gear housing.
The water pressure is too high.
▶
Reduce the water pressure.
The rotary shaft seal is worn out.
▶
Replace the rotary shaft seal.
The diamond core bit can’t be
fitted into the chuck.
The core bit connection end or
chuck is dirty or damaged.
▶
Clean and grease the connec-
tion end and/or the chuck or
replace these parts.
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.
Printed: 09.08.2019 | Doc-Nr: PUB / 5069586 / 000 / 08
Summary of Contents for DD 160
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