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Fault Possible cause Remedy
The saw blade drops out. The saw blade is not engaged correctly. Reinsert the saw blade, taking care to
ensure that the blade holder is fully open
and the saw blade is pushed in against the
resistance felt.
The blade clamping mechanism is Clean the blade holder.
dirty.
The saw blade cannot be The blade clamping mechanism is Clean the blade holder.
inserted. dirty.
The tool cannot be The supply cord is not plugged in. Check that the supply cord is plugged in.
switched on. The switch is defective or dirty. Clean the exterior of the switch with a
cloth or have the switch checked by a
trained electrical specialist.
The switch cannot be lock- The switch is defective or dirty. Clean the exterior of the switch with a
ed in the sustained running cloth or have the switch checked by a
position (WSJ 750-ET and trained electrical specialist.
850-ET)
The orbital action cannot The tool is dirty. Clean and remove foreign matter from
be adjusted. the slot for the orbital action adjustment
lever.
No orbital action. The tool is dirty. Check the area of the orbital action fork
and remove any dirt or foreign matter.
The orbital action adjustment lever Set the lever to the desired position.
is set to the "0" position.
Speed cannot be adjusted. The stroke rate adjustment thumb- Clean the exterior of the thumbwheel or
wheel is dirty or defective. have the tool checked by a trained
electrical specialist.
Speed too high or too low. The wrong stroke rate is set. Check the stroke rate setting
(scale on the thumbwheel) and adjust it
accordingly.
Dust removal with the The dust removal hood is not fitted. Check that the vacuum cleaner is working
vacuum cleaner or dust and that the dust removal adaptor and
removal module doesn’t dust removal hood are fitted.
work. The passages in the tool and / or dust Clean the passages in the tool or dust
removal adapter are dirty or blocked. removal adapter.
The baseplate cannot be The securing screw has not been Check the screw and release it if neces-
pivoted. released or the connection between sary. Clean the area between the baseplate
the baseplate and the tool is dirty. and the tool.
An accessory cannot The point of attachment to the base- Clean the point of attachment to the base-
be fitted (WSJ 850-ET/-EB) plate is dirty or the wrong accessory plate and check whether a suitable acces-
is being used. sory is being used.
The dust removal module The module is not correctly attached Check that the module is correctly
doesn’t function. to the tool. attached to the tool.
The dust container is full. Empty the dust container.
The filter is dirty. Clean the filter or fit a new dust container.
The cut is not straight. The blade is unsuitable for the Use the saw blade recommended by Hilti
application. for the application you are carrying out.
The blade is blunt or damaged. Use a suitable, new saw blade.
The material being cut Stroke rate and cutting force is too Reduce the stroke rate and apply less
overheats. high. pressure.
The material being cut Inadequate lubrication when cutting Use a new saw blade and ensure adequate
overheats (metal). metal. lubricant is applied between the saw blade
and workpiece.
9. Troubleshooting