Hilti DX 351 Original Operating Instructions page 32

Fault
Base material is spalling
en
Nail does not
penetrate surface
Nail breaks
Wasted (unused) cartridges
28
Printed: 12.08.2013 | Doc-Nr: PUB / 5069821 / 000 / 02
Cause
■ High strength concrete
■ Hard and/or large aggregate in
concrete
■ Old concrete
■ Driving power too low
■ Application limit exceeded
(very hard surface)
■ Unsuitable system
■ Driving power too low
■ Application limit exceeded
(very hard surface)
■ The tool is not pressed fully
against the work surface
Possible remedies
■ Adjust the power setting
■ Use an alternative system
(DX460 with spall stop or DX-
Kwik)
■ Use a higher power setting or
heavier cartridge
■ Use nail with higher application
limits
■ Switch to more powerful system
e.g. DX 460
■ Try higher power setting or
heavier cartridge
■ Use a shorter nail if permissible
■ Use nail with higher application
limits
■ Switch to more powerful system
e.g. DX 460
■ Press the tool fully against the
work surface before pulling the
trigger