7
2.3 Maintenance
The grinding machine must be placed on a dry place to avoid the grinding wheels
from getting wet by damp or rain.
The grinding wheel often gets uneven during use and therefore we recommend
that you make it even occasionally. We recommend that you replace the grinding
wheel when it is worn about 25%. An uneven grinding wheel causes vibrations
which with time destroys the bearings in the machine.
Damaged tool rests, eye shields and covers must be replaced immediately to
avoid personal injuries or material damage.
When the grinding wheel must be replaced first dismount the spark arrester (A)
(see
fig.: 2.1
), then dismount the outer cover (B). The nut (C) is unscrewed and
now the outer flange and the grinding wheel can be taken off. The new grinding
wheel is not allowed to exceed the measures given on the motor sign on the
machine. It is very important that the hole dimension is correct.
The grinding wheels are supplied with labels (discs made of pressed material),
which are placed around the holes on both sides of the grinding wheel. If these
labels are damaged or missing they must be replaced by new ones of the same
dimension.
The new grinding wheel is mounted between the two flanges (D) and the lock nut
(C) is screwed on and tightened. The lock nut (C) must be tightened enough to
hold tight the grinding wheel but not too tight as this will result in unwanted tension
in the grinding wheel.
Fig.: 2.1