Hilti DX 351-CT Operating Instructions Manual page 31

Fault
The piston jams in the fastener
guide.
The nail bends.
Concrete spalling.
The fastener doesn't penetrate
the concrete deeply enough.
Printed: 17.04.2014 | Doc-Nr: PUB / 5069829 / 000 / 03
Possible cause
The piston is damaged.
Use of excessively high driving power
on steel.
Firing the tool at a high power setting
without a fastener loaded.
Hard and/or large aggregates in the
concrete.
A rebar is located just below the con-
crete surface.
Hard surface.
High-strength concrete. Hard and/or
large aggregates in the concrete. Old
concrete.
Driving power is too low.
The application limits have been ex-
ceeded (very hard material).
Remedy
Unscrew the black housing.
Check the piston and replace it if ne-
cessary.
Reduce the driving power.
Avoid firing the tool without a fastener
loaded.
Use a shorter fastener if permissible.
Use a nail with a higher application
limit.
Use a different system.
Adjust the driving power.
Use a different system. e.g. DX-Kwik.
Increase driving power or use a more
powerful cartridge.
Use a stronger fastener.
en
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