Operating Instruction DX 351-CT (01)

Fault Possible cause Remedy
The fastener is not driven deep
enough.
Fastener driving power is too low. Increase fastener driving power in
accordance with recommendations
or, respectively, use a more powerful
cartridge.
The fastener used is too long. Use a shorter fastener if permissible.
The tool is fouled with dirt and
residues.
Clean the tool.
The piston is broken. Change the piston.
The tool is damaged. Contact Hilti.
The tool remains compressed
(does not extend to original
state when pressure is
released).
The tool is fouled with dirt and
residues.
Clean the tool.
A cartridge doesn’t fire. The tool is not pressed fully against
the working surface.
Press the tool fully against the work-
ing surface.
The cartridge strip is used up. Remove the used cartridge strip and
load a new one.
One of the cartridges is faulty. Push the cartridge strip further and
use up the remaining cartridges.
The tool is defective or the cartridges
are faulty.
Contact Hilti.
The tool is badly fouled with dirt and
residues.
Clean the tool.
Big drop in driving power. The tool is badly fouled with dirt and
residues.
Clean the tool.
The piston guide jams. The tool is badly fouled with dirt and
residues.
Clean the tool.
The piston is damaged. Unscrew the black housing.
Check the piston and replace it if nec-
essary.
Excessively thick fire protection coat-
ing on the ceiling.
Remove the fire protection coating.
The tool cannot be fired even
when fasteners and cartridges
are inserted correctly.
The tool is badly fouled with dirt and
residues.
Clean the tool.
Incorrect use of the grip. Use the grip correctly.
See section: 7.2 Operation 34
Material with fire protection coating. Excessively thick fire protectioncoat-
ing on the ceiling.
en
9
Printed: 17.04.2014 | Doc-Nr: PUB / 5126210 / 000 / 02