Hilti DX 450 Manual Del Usuario página 34

2. Use the flat brush to clean piston (1).
3. Use the thick round brush to clean the piston guide (inside) (2).
4. Use the thin round brush to clean cartridge chamber (3).
5. Use the flat brush to clean the piston guide (outside) (4).
▶ Oil the piston guide (outside) with Hilti spray.
6. Use the flat brush to clean the base plate (inside) (5) and use the thick round to clean the thread (outside)
(6).
7. Use the thin round brush to clean the through-bore for the piston (7).
8. Use the flat brush to clean the fastener guide (outside) (8).
▶ Oil the fastener guide (outside) with Hilti spray.
9. Use the thick round brush to clean internal thread (9) of the base-plate mount.
▶ Oil the internal thread of the base-plate mount with Hilti spray.
8.3.5 Replacing jammed stop ring
If piston guide and piston jam on disassembly, the deformed stop ring might have become jammed on the
piston.
1. Disassemble the fastening tool to the point at which you can remove the piston guide.
2. Insert the rod through the cartridge chamber and use the rod to push the piston out of the piston guide.
3. Remove the friction ring and pull the stop ring off the piston.
4. Replace the stop ring and the stop ring.
8.3.6 Final check of the fastening tool
▶ After carrying out care and maintenance, check that all protective and safety devices are fitted and that
they function faultlessly.
9 Troubleshooting
WARNING! Risk of injury! Before you start troubleshooting, make sure there are no cartridges in the
fastening tool. If the cartridges cannot be removed, contact Hilti Service
If the trouble you are experiencing is not listed in this table or you are unable to rectify the problem by
yourself, please contact Hilti Service.
Malfunction
Cartridge is not transported
Cartridge strip cannot be
removed
The cartridge doesn't fire
30 English
Possible cause
Cartridge strip damaged.
Fastening tool is damaged.
The fastener driving rate is too
high.
Fastening tool dirty.
Bad cartridge (does not fire or
achieves slight or no impact).
Fastening tool dirty.
Action to be taken
▶ Unload the fastening tool.
→ page 26
▶ Remove the cartridge strip and
insert a new strip.
▶ Contact Hilti Service.
▶ Allow the fastening tool to cool
and then carefully try to remove
the cartridge strip. Remove the
piston guide from the fastening
tool. If the cartridge sleeve
is jammed in the cartridge chamber, use the round rod to
remove it. If the cartridge sleeve
remains jammed, contact Hilti
Service. Do not attempt to
forcibly remove cartridges from
the magazine strip.
▶ Clean and oil the fastening tool.
→ page 29
▶ Pull the cartridge strip through
to the next cartridge.
▶ Clean and oil the fastening tool.
→ page 29
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