Troubleshooting - Hilti DX 5 Original Operating Instructions

8. Assemble the tool.
6.9 Cleaning and lubricating the magazine tool
1. Spray the piston rings lightly with oil and then use the flat brush to clean them using the flat brush until
the rings are free to move.
2. Use the flat brush to clean the thread on the fastener guide.
3. Use the large round brush to clean the inside of the housing.
4. Dismantle the exhaust gas piston return unit.
5. Clean the exhaust gas piston return unit.
6. Spray the cleaned parts with the supplied Hilti lubricant spray.
Note
Use only Hilti lubricant spray or a product of comparable quality. Use of other lubricants may
damage the tool.
7. Fit the exhaust gas piston return unit.
8. Assemble the tool.
6.10 Assembling the single-fastener tool
1. Check whether there is a cartridge in the tool, and remove it if there is.
2. Fit the exhaust gas piston return unit.
3. Fit the piston.
4. Fit the buffer onto the fastener guide.
5. Screw on the fastener guide.
6.11 Assembling the magazine tool
1. Check whether there is a cartridge in the tool, and remove it if there is.
2. Fit the exhaust gas piston return unit.
3. Fit the piston.
4. Fit the buffer onto the fastener guide.
5. Screw on the fastener guide.
6.12 Final check of the tool
1. After carrying out care and maintenance work, check that all safety devices are fitted and that they are
functioning correctly.
2. After checking the tool, press and hold the pushbutton for 10 - 12 seconds to reset the maintenance
counter.

7 Troubleshooting

7.1 Problems with the tool
Malfunction
The piston gets stuck in the
base material.
Higher force required to press
the tool against the surface.
Trigger resistance increases.
Stiff movement of power reg-
ulation wheel.
Printed: 29.09.2017 | Doc-Nr: PUB / 5292579 / 000 / 01
13
14
15
Possible cause
The fastener is too short.
The fastener has no washer.
Driving power is too high.
Build-up of combustion residues.
Build-up of combustion residues.
Build-up of combustion residues.
Action to be taken
▶ Use a longer fastener.
▶ Use a fastener with washer for
applications on wood.
▶ Reduce driving power (adjust
the power regulating wheel).
▶ Use a less powerful cartridge.
▶ Use the nails with a "top hat".
▶ Use the nails with a washer.
▶ Service the tool.
▶ Service the tool.
▶ Service the tool.
English 9