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● Lay the tool down only after the blade has come to a
standstill.
-CAUTION-
● The saw blade becomes hot during
long periods of use.
● There is a risk of burning if the blade
is touched.
● Wear protective gloves.
8. Care and maintenance
Unplug the supply cord from the electric socket.
8.1 Care of blades
● Used saw blades should be cleaned to remove resin
deposits at regular intervals as clean blades achieve
a higher cutting performance. Resin deposits can be
removed by placing the saw blades in a bath of paraf-
fin (kerosene) or commercially available resin remover
for 24 hours.
8.2 Care of the tool
● The tool was lubricated adequately when it was man-
ufactured. After long periods of heavy use it is rec-
ommended that the tool is inspected and serviced at
a Hilti workshop. This will increase the life expectan-
cy of the tool and avoid unnecessary repair costs.
● Repairs to the electrical section of the tool may be car-
ried out only by a trained electrical specialist.
The outer casing of the tool is made from impact-resis-
tant plastic. Sections of the grip are made from an elas-
tomer material (WSJ 850-ET/-EB).
Never operate the tool when the ventilation slots are
blocked. Clean the ventilation slots carefully using a dry
brush. Do not permit foreign objects to enter the interior
of the tool. Clean the outside of the tool at regular intervals
using a slightly damp cloth. Do not use a spray, steam
pressure cleaning equipment or running water for cleaning.
This may negatively affect the electrical safety of the tool.
Always keep the grip surfaces of the tool free from oil and
grease. Do not use cleaning agents which contain silicone.
8.3 Maintenance
Check all external parts of the tool for damage at regular
intervals and check that all controls operate faultlessly.
Do not operate the tool if parts are damaged or when the
controls do not function faultlessly. If necessary, your
electric tool should be repaired at a Hilti repair center.
Repairs to the electrical section of the tool may be car-
ried out only by trained electrical specialists.
8.4 Checks after care and maintenance
After care and maintenance, check that all protective
devices are fitted and that they function faultlessly.
7.2 Switching on / off
7.2.1 On / off switch (WSJ 750-ET /
WSJ 850-ET) ẍẐ
1. Plug the supply cord into the electric socket.
2. Switch the tool on by pressing the on / off switch.
– Switching on: Press the on / off switch.
– Switching off: Release the on / off switch.
– Sustained
operation: Press the on / off switch and then
press the switch lockbutton.
– Switching off: Press the on / off switch again and
then release it.
7.2.2 On / off switch (WSJ 750-EB /
WSJ 850-EB) ẍẑ
1. Plug the supply cord into the electric socket.
2. Switch the tool on / off by way of the sliding switch.
7.3 Plunge sawing ẍẒ
-NOTE-
Use the plunge sawing method only for soft materials.
Only short blades should be used.
1. Plug the supply cord into the electric socket.
2. Set the orbital action regulation lever to the 0 posi-
tion.
3. Bring the front edge of the baseplate into contact with
the workpiece.
4. Hold the tool securely and press the on / off switch.
5. Press the tool firmly against the workpiece and begin
the plunge movement by reducing the angle between
the baseplate and the workpiece.
6. Once the blade has penetrated the workpiece, bring
the tool into the normal working position (with the
entire baseplate surface in contact with the work-
piece).
7. Continue sawing along the cutting line.