Hilti DX 9-HSN Manual page 19

DANGER
Risk of burns! Parts of the tool may be very hot after the tool has been in use.
▶ If it is necessary to carry out maintenance without first allowing the tool to cool down, it is essential
that protective gloves are worn.
1. Disassemble the base plate. → page 10
2. Pull out the catch and hold it in this position. Pull the piston out of the piston guide and then release the
catch.
3. Pull the piston brake out of the base plate.
4. Pull out the catch and hold it in this position. Pull the piston guide upwards out of the tool and then
release the catch.
5. Clean the inside of the tool. Then stand the tool upside down and tap it firmly with your hand so that the
dirt falls out.
6. Use the large accessory wire brush to clean the surfaces of the piston guide (see marked area).
7. Use the small round brush to clean the cartridge chamber and the adjoining holes for the power regulation
pin.
8. Use the narrow round brush to clean the cartridge guideway.
9. Use Hilti lubricant spray to lubricate the moving parts of the fastener strip guides and the fastener strip
guides in the base plate.
Note
Use of other lubricants may damage the rubber parts, especially the piston brake. Moreover, other
lubricants may cause dust to adhere to parts of the tool resulting in a build-up of deposits.
10. Slide the piston guide into the tool from above, until the catch engages.
11. Pull out the catch and hold it in this position. Insert the piston, pushing it in until the tip of the piston no
longer projects beyond the end of the tool, and then release the catch.
12. Fit the piston brake into the base plate.
13. Fit the base plate. → page 10
14. Press the reset button for at least 1 second to reset the counter for the number of fasteners driven until
the next scheduled cleaning operation is due.
15. Check that the tool is ready for use. → page 6
6.5 Wear criteria for important parts of the tool
Note
Damage to parts, in cases where replacement of the parts is obviously necessary, e.g. when parts are
broken, is not listed in the following tables.
Piston and piston brake wear criteria
Status
New condition
Printed: 28.06.2017 | Doc-Nr: PUB / 5359689 / 000 / 00
Illustration showing example Annotation
English 11