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6 MN903
Maintenance
WARNING: Prevent electrical shock hazard and accidental machine operation. Always disconnect
grinder from the power source before servicing, changing accessories (such as wheels,
tool rest, spark arrestor, etc.) or before performing maintenance.
WARNING: Never install a wheel that is damaged, such as a chip or crack on any surface. A damaged
wheel can disintegrate while rotating at a high RPM or when work is placed against the
wheel. This can severely harm the operator or others in the area.
Replace worn grinding wheel as necessary. The grinding wheel should be replaced after the
diameter is reduced by 2 inches from original size. When replacing a worn wheel, remove all
grinding dust from wheel guard.
Motor and pulley bearings are lubricated for life and do not require additional lubrication.
Replacement wheels may be purchased directly from your local industrial supply dealers,
abrasive dealers, tool dealers, etc.
Remove grinding dust from exhaust ports to prevent accumulation.
Replace damaged parts immediately to maintain safety of machine.
Table 1 Minimum Gauge Wire Size
Volts Total Length of Cord (Cord + Extension, in Feet)
Ampere Rating
115V 25 50 100 150
Ampere
Rating
230V 50 100 200 300
More Than Not More Than AWG
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12 Not Recommended