Hilti DX 9-ENP Manual page 22

4. Check the piston and piston stopper for damage. Check the piston for straightness by rolling it on a
smooth surface.
Never use a worn or damaged piston and do not tamper with or modify the piston.
Observe the wear criteria applicable to important tool components, as listed in the "Care and
maintenance" section. → page 15
Result
If damage is found and/or if the piston is bent or jammed with the piston stopper
▶ Replace the piston and piston stopper as a set.
5. 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.
6. Insert the piston stopper (rubber part to the front) into the base plate.
7. Fit the base plate. → page 14
7.2 Disassembling the base plate
WARNING
Risk of injury! Cartridges in the tool could fire (explode).
▶ Check that all cartridges have been removed from the tool before carrying out the following tasks with
the tool.
CAUTION
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. Stand the tool on its grip.
2. Press the magazine release button (red button) on the magazine and allow the magazine to slide down.
3. Rotate the base plate in a counter clockwise direction, until the connection is released.
4. Lift off the base plate.
7.3 Fitting the base plate
1. Make sure that the piston stopper is correctly fitted in the base plate and that the piston guide and the
piston are correctly seated in the tool.
2. Press the base plate against the thread.
3. Rotate the base plate in a clockwise direction as far as it will go.
4. Rotate the base plate back slightly until it is in its starting position relative to the magazine.
5. Push the magazine back until it engages with the base plate.
7.4 Cleaning the fastening tool
WARNING
Risk of injury! Cartridges in the tool could fire (explode).
▶ Check that all cartridges have been removed from the tool before carrying out the following tasks with
the tool.
CAUTION
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 14
2. Pull the catch out and hold it in this position. Pull the piston out of the piston guide and then release the
catch.
3. Pull the piston stopper out of the base plate. If necessary, use the piston to lever the piston stopper out
of the base plate.
4. Pull the catch out and hold it in this position. Pull the piston guide upwards out of the tool and then
release the catch.
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