Hilti DX 6-GR Notice D'utilisation page 19

8.3.1 Disassembling the fastening tool
WARNING! Make sure that there are no cartridges or fasteners in the fastening tool. If there are cartridges
or fasteners in the fastening tool, pull the cartridge strip up and out of the fastening tool by hand and remove
the fasteners from 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)
▶ The piston rings are cracked or missing.
▶ The piston is bent (check by rolling the piston on a smooth, flat surface).
2. The buffer must be replaced in the following cases:
▶ The metal ring of the buffer is loose or broken.
▶ The buffer no longer holds on the fastener guide.
▶ The rubber is badly worn at certain points under the metal ring.
8.3.3 Cleaning and oiling fastening tool
Use only Hilti spray. The use of other lubricants can cause malfunctions or damage the fastening tool.
1. Disassemble the fastening tool. → page 11
2. Use the flat brush supplied for the purpose to clean the piston rings until the piston rings move freely.
3. Use the flat brush to clean the lock of the fastener guide.
4. Oil the lock of the fastener guide and then wipe the lock lightly with a cloth.
5. Use the large round brush supplied for the purpose to clean the inside of the exhaust gas piston return
unit.
6. Oil the lock of the exhaust gas piston return unit on the inside.
7. Use the flat brush to clean the back end of the exhaust gas piston return unit and the pins.
8. Oil the pins and then wipe the pins lightly with a cloth.
9. Use the tapered brush supplied for the purpose to clean the tapered cartridge chamber.
10. Clean the cartridge barrel with the cleaning rod supplied for the purpose.
8.3.4 Final check of the fastening tool
1. After carrying out care and maintenance, check that all protective and safety devices are fitted and that
they function faultlessly.
2. Reset the cleaning indicator. → page 9
9 Problems with the fastening tool
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
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