4
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
Ampere Rating
Volts
Total Length of Cord (Cord + Extension, in Feet)
115V
25
50
100
150
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
