Multiquip CDM2CSA - Manual (Page 21)

DM15A9C/CDM2CSA — OPERATION AND PARTS MANUAL — REV. #1 (11/09/05) — PAGE 21
Operation
1. Place the valve on the water source to the ON position, and
then turn the water valve on the core drill (Figure 20) to the
ON position (down). Verify that water is flowing smoothly
and evenly. Turn the valve clockwise to increse water flow
and counterclockwise to decrease water flow.
Figure 21. Wall Drilling Application
2. If water is not flowing, check all connections and correct the
problem. Water should be flowing at a rate of one or two
gallons per minutes.
3. Turn the core drill power ON/OFF switch to the ON position.
The drill bit should begin to rotate at the desired rpm setting.
4. Hold the cradle handle,then slightly loosen the cradle lock
knob and slowly rotate clockwise the raise/lower handle to
lower the bit into the work surface (Figures 21 and 22),
applying steady even pressure.
5. Water flow is adequate when the water and cuttings are
flushed in a circular pattern about 1/2-inch (12.7 mm) around
the bit.
6. To help reduce bit "walking", always use a light pressure to
start the hole and wait for the bit to penetrate the work surface
completely before increasing the pressure.
7. When the cut is complete, keep the drill motor ON and rotate
the raise lower handle counterclockwise to remove the bit.
Figure 20. Water Valve (ON Position)
DM15A9C/CDM2CSA — OPERATION
Figure 22. Floor Drilling Application
When drilling from high places, cores can often drop from
the drill bit. When drilling in high places make sure work
personnel and equipment below are clear of drilling area.
The possibility exists of a core falling on equipment causing
damage to the equipment or severe bodily harm even death!
to work personnel.
Danger - Drill Bit Cores
ALWAYS be on the lookout for
exposed wiring or buried electrical
connections when drilling.
When removing the bit from the cut,
always keep the power on. This will
prevent bit from being stuck as the bit
is being raised. ALWAYS drill with
uniform pressure and keep the bit
straight. When drilling through steel
rebar, reduce the pressure to avoid
overloading the motor.
NOTE
NOTE