Hilti DX 351-BT Manual page 31

1. Keep the fastening tool pressed against the work surface for at least 30 seconds and trigger the fastening
tool again.
2. Lift the fastening tool away from the working surface.
▶
Be sure not to point it toward yourself or other persons!
3. Try to pull the fastener guide to its initial position by hand.
▶
Take your hand off the trigger and do not hold your hand in front of the muzzle!
4. Immediately pull the cartridge strip out of the fastening tool.
▶
If the cartridge strip cannot be removed:
▶ Allow the fastening tool to cool down at a safe location under observation.
▶ At all times, make sure that the fastening tool is not pointing toward you or anyone else.
▶ Contact Hilti Service.
5. Service the tool. → page 26
7.2 Cartridge does not fire when fastening tool is above operating temperature
At all times, make sure that the fastening tool is not pointing toward you or anyone else!
If a cartridge does not fire, proceed as follows:
1. Keep the fastening tool pressed against the work surface for at least 30 seconds and trigger the fastening
tool again.
2. If the cartridge still does not fire, wait for 30 seconds and then lift the fastening tool away from the work
surface.
3. Immediately pull the cartridge strip out of the fastening tool.
▶ If the cartridge strip cannot be removed:
▶ Allow the fastening tool to cool down at a safe location under observation.
▶ Contact Hilti Service.
4. Service the tool. → page 26
5. Move the cartridge to a safe location.
6. Dispose of the cartridges that have not fired.
▶ Comply with the locally applicable disposal regulations.
7. Allow the fastening tool to cool down and resume work with a new cartridge strip.
7.3 The cartridge does not fire when the fastening tool is at operating temperature
After 2-3 misfires, i.e. no clearly audible firing sound and fasteners are not driven or not driven adequately,
please proceed as follows:
1. Keep the fastening tool pressed against the work surface for at least 30 seconds and trigger the fastening
tool again.
2. If the cartridge still does not fire, wait for 30 seconds and then lift the fastening tool away from the work
surface.
3. Stop using the tool immediately and remove the cartridge strip.
4. Disassemble the fastening tool. → page 22
5. Check that you are using the correct combination of fastener guides, piston, fasteners and cartridge.
6. Check piston brake and piston for wear; replace the components as necessary. → page 27
7. Clean and oil the fastening tool. → page 26
▶ If the problem persists after the measures described above have been taken, further use of the
fastening tool is not permissible.
▶ Have the fastening tool checked and, if necessary, repaired by Hilti Service.
Dirt and residues build up in the tool under normal operating conditions and functional parts are
also subject to wear.
Service the tool at regular intervals → page 26. Check the piston and piston brake daily if the
fastening tool is used intensively, or at the latest after every 2500 to 3000 fasteners. The interval
corresponds to the regular cleaning cycle of the fastening tool. The service and cleaning cycles
are based on typical tool use.
When 30,000 fasteners have been driven, have the tool fully serviced by Hilti Service.
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