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Wheel Removal &
Installation
Before installing any wheel, perform a "ring test" ti
make sure it is free of cracks. Never use a wheel
which is suspected of having cracks, is damp, or if
there are visual chips, nicks or dents in the wheel
surface. Refer to the in-depth safety warnings in
the Safety Section before installing the wheel.
To remove and install a grinding wheel:
1.
DISCONNECT MACHINE FROM POWER!
2.
Remove the three Phillips head screws and
nuts which go through the outer guard.
3.
Remove the outer guard and rim guard. See
Figure 4.
4.
Use a
⁄
" or 19mm open end wrench on the
3
4
nut which holds the wheel on the spindle.
Hold the wheel from turning with the other
hand. Note that the wheel on the left hand
side of the machine is a left hand thread, so
loosening it will require turning it clockwise.
Figure 13. Wheel guard components.
5.
Remove the outer wheel flange and the
paper disc.
Model G9717 (Mfd. Since 3/00)
6.
Pull the wheel free from the spindle. There
will also be a paper disc and a wheel flange
on the back side of the wheel. Always make
certain there is a paper or fiber disc between
the wheel flanges and the wheel itself, this
helps to spread the rotational forces across
the inner area of the wheel. See Figure 5.
Figure 14. Grinding wheel assembly.
NEVER install a grinding wheel without
paper or fiber discs between the wheel
and the flange. Omitting the discs can put
uneven stress on the wheel, causing it to
crack when the nut is tightened and pos-
sibly fly apart.
7.
Mount new wheel in the reverse order. First
a wheel flange, a paper disc, the wheel, a
paper disc, a wheel flange and finally the nut
itself. Tighten the nut snugly but do not over
tighten. Over-tightening can crack the wheel.
8.
While standing clear of the line of rotation,
run a new wheel for at least 1-2 minutes. If a
wheel does have defects it will generally fail
as soon as it gets up to full speed.
Warped wheel flanges can contribute to
grinding wheel breaking and flying apart.
Never use warped wheel flanges. Always
check flanges before re-installing grinding
wheel.
-19-
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