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DFG-SERIES SURFACE GRINDERS OPERATION AND PARTS MANUAL REV #4 (05/28/09) PAGE 32
ASSEMBLY INSTRUCTIONS/OPERATIONS
utilizing the SURFACE GRINDER. There is no
charge for this service. A qualified electrician
can also be consulted. If a 115 VAC power
outlet is selected, it is recommended that a
properly tested, externally mounted, ground fault
circuit interrupter (GFCI) be utilized at all times
as an additional safety precaution. Ground fault
circuit interrupters are not available for operation
on 230 VAC. FIGURE 34.
FIGURE 34
DANGER
FOR MAXIMUM PROTECTION AGAINST A
FAULT, ALWAYS CONFIGURE THE GROUND
FAULT CIRCUIT INTERRUPTER TO BE
PLUGGED INTO THE EXTENSION CORD. A
CONFIGURATION WITH THE GROUND FAULT
CIRCUIT INTERRUPTER PLACED BETWEEN THE
POWER SOURCE AND THE EXTENSION CORD
WILL NOT AFFORD MAXIMUM PROTECTION
AGAINST A POTENTIAL FAULT.
6) Couple the NEMA 6-20R receptacle and the
NEMA 6-20P plug together.
7) Grasp the operator handle with firm gripping.
When starting the electric motor, apply a down
force directly to the operator handle to help
reduce the amount of machine weight against
the work surface. Turn the ON/OFF switch to the
ON position. Reduce the amount of applied
down force on the operator handle as the
electric motor attains its operational speed.
When operating on 115 VAC, the electric motor
will require additional starting time to help
compensate for the additional starting amperage
requirement. This time is usually within two
seconds of a
ctivating the ON/OFF switch.
8) The DFG/E Series electrically powered
SURFACE GRINDER is not equipped with a
centrifugal clutch assembly. The electric motor is
directly coupled to the multi-accessory discs by
a V-belt/spur gear transmission.
DANGER
AS SOON AS THE ELECTRIC MOTOR HAS
STARTED, THE OPERATOR MUST BE IN A
POSITION TO ASSUME DIRECT AND FULL
CONTROL OF THE SURFACE GRINDER.
FAILURE TO ASSUME DIRECT AND FULL
CONTROL CAN RESULT IN PROPERTY
DAMAGE AND/OR PERSONAL INJURY.
9) The DFG/E Series electrically powered
SURFACE GRINDER is stopped by moving the
ON/OFF switch located on the operator handle
to the OFF position. For safety considerations, it
is also recommended that the extension cord be
disconnected from both the SURFACE
GRINDER and electric power source whenever
the SURFACE GRINDER is not in use on the
job site.
STARTING THE DFG/G SERIES GASOLINE
POWERED SURFACE GRINDER ON THE
JOBSITE.
1) Position the SURFACE GRINDER on a flat and
level surface of firm foundation.
2) Refer to the material supplied by the engine
manufacturer for the correct starting, operation
and stopping procedures.
3) The DFG/G Series SURFACE GRINDER is
equipped with a centrifugal clutch assembly. The
clutch is designed to engage at approximately
2400 RPM engine speed. Normal operation of
the clutch will allow the engine to operate a
t its
designated idle speed without the multi-
accessory discs rotating. If the multi- accessory
discs rotate below the designated engine idle
speed, do not continue to operate the
SURFACE GRINDER until the problem has
been properly corrected. Consult the Customer
Service Department for specific information.
There is no charge for this service.