Operating Instruction DX 76 (01)

Fault Possible cause Remedy
The tool remains compressed
(doesn’t extend when pressure
is released).
The cartridge strip has jammed, the
tool has overheated.
Please refer to the fault: “Cartridge
strip can’t be removed”. Do not ex-
ceed the maximum recommended
fastener driving rate.
The tool can’t be fired. The tool wasn’t cycled correctly, the
cycling grip is not in the starting posi-
tion.
Cycle the tool completely and return
the cycling grip to the starting posi-
tion.
The trigger is pulled before the tool
is pressed fully against the working
surface.
Press the tool fully against the work-
ing surface and then pull the trigger.
Fastener transport malfunctions See section: 7.2.1 Loading fastener
strips in the magazine 2
See section: 7.3.2 Removing fastener
strips from the tool 9
The magazine or fastener guide is not
screwed on far enough.
Screw the magazine farther onto the
tool.
The tool is damaged. Contact Hilti.
The tool is badly fouled with dirt and
residues.
Clean the piston guide. Check the
straightness of the piston.
Clean the tool.
See section: 8.2.2 Cleaning the piston
guide    
The trigger is pulled before the tool
is pressed fully against the working
surface.
Press the tool fully against the work-
ing surface and then pull the trigger.
No fastener is driven. The tool wasn’t cycled correctly, the
cycling grip is not in the starting posi-
tion.
Cycle the tool completely and return
the cycling grip to the starting posi-
tion.
No fasteners in the tool. Load fastener(s) into the tool.
The magazine fastener transport
mechanism is faulty.
Contact Hilti.
No piston in the tool. Fit the piston.
The piston is broken. Change the piston and piston stop-
per.
The piston doesn’t return to its start-
ing position.
Contact Hilti.
The fastener guide needs to be
cleaned.
Use the brushes provided to clean the
fastener guide and associated parts.
Lubricate with Hilti spray.
Fasteners are jammed in the fastener
guide.
Remove the jammed fasteners. Re-
move magazine strip plastic scraps
from the tool magazine. Avoid shear
breakage (see above). Avoid missing
the beam (driving the fastener into
unsupported sheet metal); mark the
position of the beams accurately if
necessary.
The fastener guide can’t be
screwed on to the tool fully.
The piston stopper is fitted the wrong
way round.
Unscrew the fastener guide. Fit the
piston stopper the right way round
and then screw on the fastener guide.
The piston guide needs to be cleaned
at the end of the threaded section.
Clean and lubricate the thread.
The piston can’t be fitted.
The tool, especially the piston guide,
needs to be cleaned.
Clean the fastener guide and the tool
and refit the piston.
en
14
Printed: 17.04.2014 | Doc-Nr: PUB / 5126040 / 000 / 02