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Motor will not start – fus-
es or circuit breakers
tripping or blowing.
1. Short circuit in line, cord or
plug.
1. Inspect cord or plug for
damaged insulation and short-
ed wires.
2. Short circuit in motor or
loose connections.
2. Inspect all connections on
motor for loose or shorted ter-
minals and/or worn insulation.
3. Incorrect fuses or circuit
breakers in power line.
3. Install correct fuses or cir-
cuit breakers or switch tool to
an appropriately sized circuit.
The machine vibrates
1.
The grinding wheel is un-
balanced
1.
Balance the grinding wheel
2. The grinding wheel has
become loose.
2. Stop the machine immedi-
ately. Tighten the grinding
wheel.
3. The grinding wheel is
damaged.
3. Change the grinding wheel.
Motor overheats
1. Motor overloaded.
1. Reduce load on motor (pres-
sure on object being sanded or
grinded).
2. Extension cord too long
and of insufficient gauge.
2. Utilize an extension cord of
appropriate gauge and length
or plug tool directly into outlet.
Motor stalls (resulting in
blown fuses or tripped
circuit breaker).
1. Short circuit in motor or
loose connections.
1. Inspect connections on mo-
tor for loose or shorted termi-
nals or worn insulation. (Send
for servicing.)
2. Low voltage.
2. Correct low voltage condi-
tions (for example: improper
extension cord length and/or
gauge).
3. Incorrect fuses or circuit
breakers in power line.
3. Install correct
fuses or cir-
cuit breakers or plug tool into
an appropriate circuit,
matched to an appropriate
fuse or breaker.
4. Motor overload.
4. Reduce the load on the mo-
tor.
Machine slows when op-
erating.
1. Feed rate too great.
1. Reduce the rate at which the
workpiece is fed into the work-
ing area of the tool (grinding
wheel).
Wavy condition on sur-
face of workpiece.
1. Machine vibrating.
1. Ensure machine is securely
mounted on a solid surface.
2. Workpiece not being held
firmly.
2. Use a holding device to firm-
ly retain the workpiece.
3. Wheel face uneven.
3. Dress the grinding wheel.
