Hilti DX 351 Original Operating Instructions page 30

Fault
Cartridge falls out of the
cartridge strip
en
The operator notices:
– increased contact pressure
– increased trigger force
– power regulation stiff to adjust
– cartridge strip is difficult to
remove
Varying depths of penetration
Trigger cannot be pulled
26
Printed: 12.08.2013 | Doc-Nr: PUB / 5069821 / 000 / 02
Cause
■ Fastening frequency is too high
WARNING
Never attempt to pry a cartridge
from the magazine strip or tool.
■ Carbon build-up
■ The tool is dirty (carbon build-
up)
■ Tool not fully compressed
■ Safety mechanism activated
because:
– Magazine not loaded
– Plastic debris inside the
magazine
– Incorrect piston position
– Nail incorrectly positioned in
magazine
Possible remedies
■ Immediately discontinue using
the tool and let it cool down
■ Remove cartridge strip
■ Let the tool cool down
■ Clean the tool and remove loose
cartridge
If it is impossible to disassemble
the tool:
■ Contact Hilti Repair Centre
■ Clean the tool
(see 8.1–8.8)
■ Check that the correct cartridges
are used (see 1.2) and that they
are in faultless condition.
■ Clean the tool
(see 8.1–8.8)
■ Check piston, replace if neces-
sary
■ Release the tool and fully com-
press it again
■ Load fastener strip
■ Open magazine, remove fastener
strip and plastic debris
If problem persists:
■ Clean the tool (see 8.1–8.8)
■ Check to ensure that the tool is
assembled correctly