Hilti DX 462 CM Manual De Instrucciones página 30

Fault
The operator notices:
– increased contact pressure
en
– increased trigger force
– power regulation stiff to adjust
– cartridge strip is difficult to
remove
Piston is stuck in the piston return
unit and cannot be removed
Piston return unit is stuck
Variation in marking quality
24
Cause
■ Carbon build-up
■ Damaged piston
■ Carbon build-up
■ Carbon build-up
■ Piston damaged
■ Damaged parts
(impact extractor, O-ring)
into the marking head
■ Worn characters
Possible remedies
■ Clean the tool
(see 8.3–8.13)
■ Check that the correct cartridges
are used (see 1.2) and that they
are in faultless condition.
■ 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
■ 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 8.3–8.13)
If the problem persists:
■ Contact Hilti Repair Centre
■ Check the piston.
Replace if necessary
■ Cleaning and servicing the
marking head (see 8.14–8.15)
■ Check quality of marking
characters