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DM15A9C/CDM2CSA — OPERATION AND PARTS MANUAL — REV. #2 (09/04/19) — PAGE 15
Figure 4. DM15A9C Core Drill Motor
DM15A9C/CDM2CSA — CORE DRILL MOTOR COMPONENTS
1
.
Speed Adjustment Knob –
Use this knob to adjust
the speed of the electric motor. Turn knob counter-
clockwise to loosen. Push knob toward shaft end to
decrease motor speed. Pull knob back towards ON/
OFF switch to increase motor speed. Once knob is in
desired position, lock in place by turning fully clockwise.
2
.
AC Power Cord –
Plug this 16 ft. (4.87 meters) power
cord into a 115 VAC grounded type receptacle.
NEVER
remove the ground pin from the plug. This will defeat
the ground circuit and greatly increase the possibility
of electrical shock.
3
.
ON/OFF Rocker Switch–
Press this rocker switch to
start and stop the electric motor.
4
.
Electric Motor Brush Covers (2) –
Insert tip of a flat
blade screwdriver into slot on brush cover, turn counter-
clockwise and remove cover to gain access to brushes.
5
.
Drill Body –
The electric motor and associated
components are contained inside the drill body
.
6
.
Main Shaft –
Attach core drill bit to this shaft. Main
shaft is 1-1/4"-7 (7 threads per inch) male. Shaft size
fits most core bits from 1-1/2" through 9" diameter.
7
.
Adapter Reducer –
Multiquip offers (option) a reducing
adapter,
1-1/4"-7 female to 5/8"-11 male for bits smaller than 1-
1/2" diameter.
8
.
Core Drill Bit–
Place bit onto main shaft and tighten
securely. Contact MQ sales department for the core
drill bit that best fits your application.
9
.
Wrenches –
3 wrenches are supplied with the
DM15A9C electric core drill motor. These wrenches
(17,19, 36 and 46 mm) are used to install and remove
the core drill bits.
10
. Water Shut-off Valve –
Turn this valve downward to let
water flow and up to stop.
11
. Water Tube/Adapter –
Connect this tube/adapter to a
water source, typically a garden hose.
12
. Core Drill Base/Woodruff key –
Attach this base to
the cradle assembly located on the column rack. Align
woodruff key with slot on base of cradle.
Figure 4 illustrates the basic componets of the MQ DM15A9C
Drill Rig. Shown below is breif explanation of each component.