Maintenance; Troubleshooting - Worx Professional WU820 Original Instructions Manual

OPERATING INSTRUCTIONS
Note: Before using the tool, read the
instruction book carefully.
INTENDED USE
The machine is intended for cutting, roughing and
brushing metal and stone materials without using
water. For cutting metal, a special protection
guard for cutting (accessory) must be used.
ASSEMBLY AND OPERATION
Action
ASSEMBLY
Assembling Auxiliary Handle
Assembling Grinding/Cutting Disc See Fig. B
Adjusting Outer Flange Clamping
OPERATON
Using On/Off Switch
Hand Grip Areas
Rough Grinding
Warning! Never use a cutting
disc for roughing.
Cutting
Replacing The Carbon Brush
WORKING HINTS FOR YOUR
ANGLE GRINDER
1. Always start at no load to achieve maximum
speed then start working.
2. Do not force the disc to work faster, reducing
the Disc's moving speed means longer
working time.
3. Always work with a 15-30 angle between disc
and workpiece. Larger angles will cut ridges
into the workpiece and affect the surface
finish. Move the angle grinder across and back
and forth over the workpiece.
4. When using a cutting disc never change the
cutting angle otherwise you will stall the
disc and angle grinder motor or break the
disc. When cutting, only cut in the opposite
direction to the disc rotation. If you cut in the
same direction as the disc rotation the disc
may push itself out of the cut slot.
5. When cutting very hard material best results
can be achieved with a diamond disc.
6. When using a diamond disc it will become
7 . Always ensure the workpiece is firmly held or

MAINTENANCE

Remove the plug from the socket before
carrying out any adjustment, servicing or
maintenance.
There are no user serviceable parts in your power
Figure tool. Never use water or chemical cleaners to
clean your power tool. Wipe clean with a dry
cloth. Always store your power tool in a dry place.
See Fig. A
Keep the motor ventilation slots clean. Keep all
working controls free of dust. Occasionally you
See Fig. C1
may see sparks through the ventilation slots. This
C2
is normal and will not damage your power tool.
If the supply cord is damaged, it must be
replaced by the manufacturer, its service agent
See Fig. D
or similarly qualified persons in order to avoid a
See Fig. E
hazard.

TROUBLESHOOTING

See Fig. F
Although your new angle grinder is really very
See Fig. G
simple to operate, if you do experience problems,
please check the following:
1. If your grinder will not operate check the
2. If your grinder wheel wobbles or vibrates,
3. If there is any evidence that the wheel is
4. If working on aluminum or a similar soft alloy,
ENVIRONMENTAL
PROTECTION
your local authorities or retailer for recycling
advice.
very hot. If this happens you will see a full
ring of sparks around the rotating disc. Stop
cutting and allow to cool at no load speed for
2-3 minutes.
clamped to prevent movement.
power at the main plug.
check that outer flange is tight; check that the
wheel is correctly located on the flange plate.
damaged do not use as the damaged wheel
may disintegrate, remove it and replace with a
new wheel. Dispose of old wheels sensibly.
the wheel will soon become clogged and will
not grind effectively.
Waste electrical products must not be
disposed of with household waste. Please
recycle where facilities exist. Check with
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