SUHNER ABRASIVE UWC 20-R Manual Tecnico página 24

3.4 w
orKing instructions
To achieve an optimum result, move tool uniformly back
and forth with light pressure. The electronic constant con-
trol maintains the speed nearly constant during idling and
work under load and assures a uniform result. Excessive
pressure lessens the working capability of the machine,
as well as the life of the tool. The machine is equipped
with an electronic control and integrated overload pro-
tection. If the machine is overloaded, the speed will drop
drastically. Immediately take the load off the machine and
allow to run for a short time without load.
4. S
ERvICE
4.1 p
reVentiVe mAintenAnce
To work effectively and surely keep the
machine and the ventilation slots clean at
all times.
After approx. 150 operating hours check carbon brushes
and replace if necessary. Clean motor housing and re-
plenish grease filling in gearbox housing.
To maintain the protective insulation the machine must be
subjected to a technical safety inspection. This work must
be done exclusively by a specialized electrical workshop.
When working on metal under extreme working conditions
conductive dust deposits can occur inside the machine,
thereby impairing the protective insulation of the tool. In
such cases the use of a stationary vacuuming system,
frequent blowing out of the ventilation slots and protection
by a fault current protection switch are advised.
4.1.1 w
Arning light indicAting cArBon Brush weAr
The machine is fitted with a warning light which lights
up yellow when the level of wear on the carbon brushes
becomes critical. When the warning light illuminates, the
carbon brushes must be replaced immediately.
4.1.2 c
hAnging the cArBon Brushes
The machine is equipped with two carbon brushes. The
carbon brushes must be changed as follows:
24
/ m
aINTENaNCE
Loosen the screw and remove the cover
Raise the spring, and remove the carbon brushes. Clean
the carbon brush holders. Insert new carbon brushes. It
is imperative that the brushes are arranged in the correct
order. Replace the cover and tighten the screws.
4.2 s
pAre pArts
See page 2.3.
4.3 r
epAir
If the machine strict observance of the manufacturing and
testing method the tool should happen to fail, it must be
repaired by an authorized SUHNER agency.
Any replacement needed for the connecting line must be
installed by the manufacturer or its agent if safety risks are
to be eliminated.
4.4 w
ArrAnty
In the event of the tool being improperly handled, used
for purposes for which it is not intended and/or of the ser-
vice and maintenance instructions not being observed by
non-authorized persons, no warranty shall be in effect for
damages/consequential damages.
Complaints can only be honored if the machine is re-
turned in the undisassembled condition.
4.5 s
torAge
Temperature range during operation: -15°C to +50°C
Max. relative air humidity: 90% at +30°C, 65% at +50°C
4.6 d / e
isposAl nVironmentAl compAtiBility
The machine consists of materials which can be recycled
in a recycling process.
.