Fitting The Water Supply Connection - Hilti DD 350-CA Manual De Instrucciones

4. Secure the extension rail by turning the eccentric
pin.
NOTE After removing the extension rail, the pro-
tective cover cap must be refitted to the rail on the
drill stand in order to ensure that safety-relevant end
stop function is restored.
5.7 Fitting the spacer 10
en
NOTE
When core bits with a diameter of 300 mm or greater
are used, the distance between the drill stand and the
drilling axis must be increased by fitting a spacer. The
hole center indicator is no longer functional when spacers
are used. A maximum of 2 spacers may be fitted, one
behind the other.
At this stage, the core drilling machine should not already
be mounted on the drill stand.
1. Lock the carriage in position on the rail and check
that it holds securely.
NOTE The carriage is locked when the locking pin
is engaged.
In this position, no movement of the carriage is
possible.
2. Pull the eccentric pin out of the core drilling machine
mount.
3. Fit the spacer onto the carriage.
4. Push the eccentric pin into the carriage as far as it
will go.
5. Use the hand wheel to tighten the eccentric pin
moderately in a clockwise direction.
NOTE The locking pin will shear if excessive force
is applied.
5.8 Mounting the machine on the drill stand 11
1. Lock the carriage in position on the rail and check
that it holds securely.
NOTE The carriage is locked when the locking pin
is engaged.
In this position, no movement of the carriage is
possible.
2. Pull the eccentric pin out of the core drilling machine
mount.
3. Fit the machine onto the carriage or the spacer.
4. Push the eccentric pin into the carriage or the spacer
as far as it will go.
5. Use the hand wheel to tighten the eccentric pin
moderately in a clockwise direction.
NOTE The locking pin will shear if excessive force
is applied.
6. Pass the supply cord through the supply cord guide
on the opposite side of the carriage.
7. Check that the machine is mounted securely.

5.9 Fitting the water supply connection

NOTE
Before starting the core drilling machine, check that the
3-way valve is set to the position for wet drilling or dry
drilling.
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5.10 Fitting the water collection system
NOTE
Use of the water collection system allows water to be
led away in a controlled manner, thus avoiding a mess
or damage to the surrounding area. We recommend, as
a general rule, that a water collection system is used
with core bits of up to 250 mm in diameter. Best results
are achieved with a wet-type industrial vacuum cleaner.
When drilling overhead on ceilings, the drill stand must
be perpendicular to the ceiling (90°) and the sealing ring
must correspond to the diameter of the diamond core bit
used.
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5.11 Fitting the diamond core bit (BL chuck) 13
DANGER
Fitting and positioning the core bit incorrectly can lead
to hazardous situations as this may cause parts to break
and fly off. Check that the core bit is seated correctly.
DANGER
Do not use damaged core bits. Check the core bits for
chipping, cracks, or heavy wear each time before use.
Do not use damaged tools. Fragments of the workpiece
or a broken core bit may be ejected and cause injury
beyond the immediate area of operation.
NOTE
Diamond core bits must be replaced when the cutting
performance and/or rate of drilling progress drops sig-
nificantly. This generally is the case when the segments
reach a height of less than 2 mm.
CAUTION
The core bit may get hot during use or during sharpening.
There is a risk of burning your hands. Wear protective
gloves when changing the core bit.
Close the valve in the water supply hose.
Connect the water supply hose to the hose con-
nector on the core drilling machine.
NOTE A flow meter, which is available as an ac-
cessory, may be fitted between the machine's water
supply hose connector and the water supply hose.
(accessory) 12
Release the screw on the front of the rail at the
hinged joint on the drill stand.
Slide the water collector holder into position under
the screw from below.
Tighten the screw securely.
Fit the water collector between the two movable
arms of the water collector holder.
Secure the water collector with the two screws on
the holder.
Connect a wet-type industrial vacuum cleaner to the
water collector or fit a length of hose through which
the water can drain away.