11
en
Piston return unit is stuck
■
Carbon build-up
■
Manually pull the front part of
the piston return unit out of the
tool
■
Check that the correct cartridges
are used (see 1.2) and that they
are in faultless condition.
■
Clean the tool (see 8.3–8.14)
If the problem persists:
■
Contact Hilti Repair Centre
Piston is stuck in the piston return
unit and cannot be removed
The operator notices:
– increased contact pressure
– increased trigger force
– power regulation stiff to adjust
– cartridge strip is difficult to
remove
■
Carbon build-up
■
Clean the tool
(see 8.3–8.14)
■
Check that the correct cartridges
are used (see 1.2) and that they
are in faultless condition.
■
Damaged piston
■
Buffer debris inside the piston
return unit
■
Damaged buffer
■
Carbon build-up
■
Remove the cartridge strip and
clean the tool (see 8.3-8.14).
Check the piston and buffer and
replace these parts if necessary
(see 8.4).
If the problem persists:
■
Contact Hilti Repair Centre
Fault
Cause
Possible remedies
Studs does not hold in base
material
Stud does not
penetrate
surface
■
Driving power too low
■
Application limit exceeded
(very hard surface)
■
Unsuitable system
■
Thin steel base material
(4 to 5 mm steel)
■
Try higher power setting or heav-
ier cartridge
■
Switch to more powerful system
like DX 76 PTR
■
Try different power setting or
different cartridge
Printed: 12.08.2013 | Doc-Nr: PUB / 5069839 / 000 / 02