24
en
Piston is stuck in the piston return
unit and cannot be removed
■
Incorrect piston position
■
Carbon build-up
■
Remove cartridge strip and use
enclosed pushrod to push piston
fully back (see 9.1)
If problem persists:
■
Clean the tool
(see 8.3–8.14)
■
Check piston and buffer, replace
if necessary (see 8.4)
Varying depths of penetration
Misfire: the nail is only partly
driven into the base material
■
Incorrect piston position
■
Bad cartridge
■
Remove cartridge strip and use
enclosed pushrod to push piston
fully back (see 9.1)
If problem persists:
■
Change cartridge strip (possibly
use a new/dry package)
■
Clean the tool (see 8. –8.14)
■
Damaged piston
■
Buffer debris inside the piston
return unit
■
Damaged buffer
■
Carbon build-up
■
Remove cartridge strip
■
Unscrew piston return unit and
push out the piston through the
cartridge chamber using the
pushrod provided
■
Check buffer and piston, if
necessary, change (see 8.4)
■
Clean the tool
(see 8.3–8.13)
Fault
Cause
Possible remedies
Piston stuck in magazine fastener
guide
Piston return unit is stuck
■
Carbon build-up
■
Manually pull the front part of
the piston return unit out of the
tool
■
Clean the tool
(see 8.3–8.14)
If the problem persists:
■
Contact Hilti Repair Centre
■
Piston and/or buffer damaged
■
Excess power when fastening on
steel
■
Tool fired with high power
without fastener in place
■
Unscrew the fastener guide
■
Check buffer and piston and
replace if necessary (see 8.4)
■
Reduce fastener driving power
■
Avoid firing the tool without a
fastener in place
