Hilti DX 6 Manual page 39

8.2 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 fastening tool.
▶ Clean the fastening tool and use Hilti spray as stated in the operating instructions. This will help prevent
malfunctions.
1. Regularly check all external parts of the fastening tool for damage.
2. Regularly check all operating controls to ensure that they work properly.
3. Use the fastening tool only with suitable cartridges and the recommended energy setting → page 28.
▶ Use of the wrong cartridges or excessively high power settings can lead to premature failure of the
fastening tool.
8.3 Servicing the tool
Service the tool in the following situations:
1. If energy fluctuations occur (evidenced by irregularities in fastener penetration depth).
2. If cartridge misfires occur (the cartridge is not fired).
3. If the tool becomes noticeably less easy to operate.
▶ If the required contact pressure increases noticeably.
▶ If the trigger resistance increases.
▶ If the selector ring for driving energy has become difficult to turn.
▶ If the cartridge strip is difficult to remove.
4. If the fastener counter indicates that a tool service is necessary.
8.3.1 Disassembling the fastening tool
WARNING
Risk of injury by accidental triggering! A loaded fastening tool can be made ready to fire at any time.
Accidental triggering can endanger you and others.
▶ Always unload the fastening tool (cartridges and fasteners) whenever you interrupt work with the fastening
tool.
▶ Before all maintenance, cleaning and setup activities, always make sure that there are no cartridges and
no fasteners in the fastening tool.
1. Press and hold down the release button of the fastener guide.
2. Turn the fastener guide counter-clockwise as far as it will go.
3. Pull out the fastener guide with piston.
4. Pull the piston out of the fastener guide.
5. Remove the buffer by bending it sharply out of the fastener guide.
6. Press and hold down the release button for the selector ring for driving energy.
7. Turn the selector ring for driving energy counter-clockwise to the removal position.
8. Pull the exhaust gas piston return unit out of the housing.
8.3.2 Checking piston and buffer
WARNING
Risk of injury! A faulty buffer or piston or a faulty base plate leads to an increased risk of malfunctions.
▶ Check the piston and buffer for wear and replace them if damaged.
▶ Do not tamper with or modify the piston.
▶ Do not attempt to repair a faulty piston yourself, for example by grinding the tip.
1. The piston must be replaced in the following cases:
▶ The piston is broken.
▶ The piston is badly worn or chipped (e.g. a segment of more than 90° of the circumferential
ring-shaped elevation at the piston tip broken away)
*2232121*
9
10
2232121 English 31