Troubleshooting - Hilti DX 76 Operating Instructions Manual

1. Unscrew and remove the fastener guide (or fastener
magazine).
2. Pull the piston out of the piston guide.
3. Hold the tool with the nosepiece pointing upwards
and then pull out the piston guide release lever.
-CAUTION-
It is essential that the tool is held with the nosepiece
en
pointing upwards. The piston guide may otherwise fall
out.
4. Pull the piston guide out of the tool.
5. Use the large brush to clean the inside and outside
surfaces of the piston guide.
6. Use the small round brush to clean the cartridge
chamber and the adjoining holes for the power reg-
ulation pin.
7. Clean the seat of the piston guide in the tool.
8. Lubricate the slider and the collar of the piston guide
with Hilti spray.
9. Lubricate the mechanical parts inside the tool with
Hilti spray.
-NOTE-
Use of lubricants other than Hilti spray may cause dam-
age to rubber parts.

9. Troubleshooting

-WARNING-
The tool must be unloaded before taking any steps to remedy faults.
Fault
Cartridge is not
transported.
Cartridge strip cannot be
removed.
Cartridge doesn't fire.
Fastener penetrates too
deeply (inadequate
fastener stand-off).
28
Possible cause
Damaged cartridge strip.
Tool is damaged.
The tool is damaged or has
overheated as a result of an
excessively high fastener driving rate.
The tool is not pressed fully against
the working surface.
The cartridge strip is used up.
The magazine or fastener guide is not
screwed on far enough.
One of the cartridges is faulty.
The tool is defective or the cartridges
are faulty.
Fastener missed the steel beam.
a
Power setting too high.
10. Push the piston guide into the tool and close the
piston release lever while applying light pressure
to the piston guide.
-NOTE-
The lever can be closed only when the piston guide is
pressed (several mm) into the tool.
If the lever still cannot be closed, please refer to the infor-
mation in section 9 " Troubleshooting" .
11. Push the piston into the fastener guide (or the fas-
tener magazine).
12. Screw the fastener guide (or fastener m agazine)
onto the piston guide as far as it will go and then
turn it back in the opposite direction until it engages.
13. Lubricate the cartridge transport m echanism by
spraying Hilti lubricant into the gap in the housing
behind the cycling grip.
14. Cycle the tool once by moving the cycling grip.
8.3 Checking the tool after care and maintenance
After carrying out care and maintenance and before load-
ing the cartridges, check that all safety devices have
been fitted and that they function faultlessly.
Remedy
Change the cartridge strip
Contact Hilti.
Allow the tool to cool and then try again
carefully to remove the cartridge strip. If
still not possible, contact Hilti.
-NOTE-
Do not attempt to forcibly remove
cartridges from the cartridge strip or
from the tool.
Press the tool fully against the working
surface and pull the trigger.
Remove the used cartridge strip. Load a
new strip.
Screw the magazine farther onto the tool.
Cycle the tool and use up the remaining
cartridges.
Contact Hilti.
Mark the position of the beam. Drive
another fastener into the beam.
Reduce fastener driving power according
to the recommendations for the cartridge
or, respectively, use a less powerful
cartridge.