Hilti DD 160 Original Operating Instructions page 41

5. Apply only light pressure until the diamond core bit
has centered itself and then increase the pressure.
6. Regulate the contact pressure while observing the
drilling performance indicator.
NOTE The drilling performance indicator lights or-
ange after switching on. Optimum drilling perform-
ance is achieved when the drilling performance in-
dicator shows a green light. If the drilling perform-
ance indicator shows a red light, reduce the pressure
applied to the core bit.
7.4 Using the machine with the water collection
system 14
WARNING
The end stop screw must be fitted at the end of the
guide rail when drilling in an upwards direction.
WARNING
Water must not be allowed to run over the motor and
cover.
WARNING
A water collection system with wet-type vacuum
cleaner must be used when drilling in an upwards
direction.
WARNING
Stop working if the vacuum removal system no longer
functions.
NOTE
Do not use the power outlet on the vacuum cleaner.
NOTE
The vacuum cleaner should be switched on manually
before opening the water supply valve and switched off
again manually after closing the water supply valve.
1. Switch the vacuum cleaner on. Do not use the
vacuum cleaner in automatic mode.
2. Connect the water supply.
3. Open the water flow regulator.
4. Press the on/off switch on the machine (position "I").
The drilling performance indicator lights orange.
5. Release the carriage locking mechanism.
6. Turn the hand wheel until the diamond core bit is in
contact with the base material.
7. Apply only light pressure until the diamond core bit
has centered itself and then increase the pressure.
8. Regulate the contact pressure while observing the
drilling performance indicator.
NOTE The drilling performance indicator lights or-
ange after switching on. Optimum drilling perform-
ance is achieved when the drilling performance in-
dicator shows a green light. If the drilling perform-
ance indicator shows a red light, reduce the pressure
applied to the core bit.
7.5 Using the Rota-Rail (column swivel)
CAUTION
Do not use the Rota-Rail as a column extension.
The Rota-Rail allows quick and easy access to the hole
being drilled, or to the core, with no need to partly or fully
dismantle the system.
1. Switch the machine off.
2. Lock the carriage on the channel by engaging the
carriage locking mechanism and check that it is
securely attached.
3. Remove the end stop screw from the end of the rail.
4. Attach the Rota-Rail so that the toothed racks are
facing the same direction.
5. Tighten the screw on the Rota-Rail securely.
6. Release the carriage lock and run the carriage along
the rail onto the Rota-Rail.
7. Release the Rota-Rail fastening screw and pivot the
machine with the Rota-Rail to the left or right to
provide access to the hole being drilled.
8. Remove the core or change the core bit.
9. Pivot the machine back to its original position,
tighten the Rota-Rail fastening screw securely and
then run the carriage back onto the column of the
drill stand in order to continue drilling.
10. After removing the Rota-Rail, refit the end stop
screw to the end of the rail.
7.6 Switching off 15
WARNING
Exercise caution when drilling overhead : The diamond
core bit fills with water during overhead drilling. 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
en
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