Hilti DX 5 GR Mode D'emploi Original page 28

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WARNING
Risk of injury due to deflagration Powder residue in the tool may ignite and cause uncontrolled
triggering or fragmentation.
▶ Clean the tool regularly. Comply with all maintenance and cleaning information and instructions in
this documentation.
▶ If inferior-quality cartridges are used, cleaning the tool will not reduce the risk of powder
residue inside the exhaust gas piston return unit igniting and causing uncontrolled triggering or
fragmentation. This can only be reduced by having the tool taken to Hilti Service for maintenance.
▶ Clean the exterior of the tool with a slightly damp cloth at regular intervals.
6.2 Maintenance
WARNING
Dangerous substances The deposits inside DX tools contain substances that may present a health
hazard.
▶ Do not inhale dust or dirt while cleaning.
▶ Keep dust and dirt away from foodstuffs.
▶ Wash your hands after cleaning the tool.
▶ Never use grease to clean or lubricate tool components. This may lead to malfunctions. To avoid
malfunctions caused by the use of unsuitable cleaning agents, use Hilti spray.
1. Regularly check all external parts of the tool for damage.
2. Regularly check all operating controls to ensure that they work properly.
3. Use the tool only with the recommended cartridges and at the recommended power settings.
◁ Use of the wrong cartridges or excessively high power settings may lead to premature failure of the
tool.
6.3 Servicing the tool
▶ Service the tool in the following situations:
◁ If power fluctuations occur.
◁ If cartridge misfires occur.
◁ If the tool becomes noticeably less easy to operate.
◁ If the required contact pressure increases noticeably.
◁ If the trigger resistance increases.
◁ If the power regulation wheel is stiff.
◁ If the cartridge strip is difficult to remove.
◁ If the maintenance indicator shows that a tool service is necessary.
6.4 Dismantling the single-fastener tool
1. Check that there is no cartridge strip or fastener in the tool. If there is a cartridge strip or fastener in
the tool, pull the cartridge strip up out of the tool by hand from above and remove the fastener from the
fastener guide.
2. Press the release button on the side of the fastener guide to unscrew the fastener guide.
3. Unscrew and remove the exhaust gas piston return unit.
4. Remove the buffer by bending it sharply out of the fastener guide. Remove the buffer.
5. Remove the piston.
6.5 Checking the piston and buffer for wear
WARNING
Checking the buffer and piston for wear Check the buffer and piston for wear.
▶ Check the buffer and piston for wear. Do not tamper with or modify the piston.
1. The piston must be replaced in the following cases:
◁ The piston is broken.
◁ The piston is badly worn or chipped (e.g. a 90° segment broken away).
◁ The piston rings are cracked or missing.
22 English
Printed: 20.03.2017 | Doc-Nr: PUB / 5292603 / 000 / 01
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