7
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8.2 Maintenance
Check all external parts of the tool for damage at regu-
lar intervals and check that all controls operate properly.
Do not operate the tool when parts are damaged or when
the controls do not operate properly. If necessary, have
the tool repaired at a Hilti service centre.
Use the tool only with the recommended cartridges and
power settings. Use of the wrong cartridges or use of
excessively high power settings may lead to premature
failure of parts of the tool.
-CAUTION-
When cleaning:
Never use grease for the maintenance/lubrication of
parts of the tool. This may lead to malfunctions. Use
only Hilti lubricant spray or a product of comparable
quality.
The residues deposited inside DX tools contain sub-
stances that may be injurious to your health:
– Do not inhale any dust or dirt while cleaning.
– Keep the dust or dirt away from foodstuffs.
– Wash your hands after cleaning the tool.
8.2.1 Checking the piston and piston brake
-NOTE-
Check that no cartridges are present in the tool. If nec-
essary, unload the tool as described at section 7.3.1.
1. Stand the tool on its grip (upside down).
2. Press the red button above the magazine and allow
the fastener strips to slide out of the magazine.
-CAUTION-
Parts of the tool may become very hot after a period of
use. Protective gloves must be worn if the following
maintenance procedure is carried out before the tool
has been allowed to cool down.
3. Unscrew the base plate with the curved loading chan-
nel in a counter-clockwise direction until it is released
from the tool. Lift the base plate and curved loading
channel away from the tool.
4. Pull the piston out of the piston guide.
5. Pull the piston brake out of the base plate.
6. Check the piston and piston brake for damage. The
piston and piston brake must be replaced if signs of
damage are found.
-NOTE-
Check the piston for bending by rolling it on a flat sur-
face.
Do not use a worn or damaged piston and do not mod-
ify the piston in any way.
7. Pull the catch and hold it. Push the piston fully into
the piston guide so that the tip of the piston does not
stick out. Release the catch.
8. Insert the piston brake in the base plate.
9. Press the base plate and the curved loading channel
against the threaded section on the tool and rotate
it on in a clockwise direction until it is screwed on
as far as it will go.
10.Turn the base plate with the curved loading channel
back to its original position above the magazine.
11.Push the magazine back until it engages with the
curved section.
8.2.2 Cleaning the piston
-NOTE-
Check that no cartridges are present in the tool. If nec-
essary, unload the tool as described at section 7.3.1.
1. Stand the tool on its grip (upside down).
2. Press the red button above the magazine and allow
the fastener strips to slide out of the magazine.
-CAUTION-
Parts of the tool may become very hot after a period of
use. Protective gloves must be worn if the following
maintenance procedure is carried out before the tool
has been allowed to cool down.
3. Unscrew the base plate with the curved loading chan-
nel in a counter-clockwise direction until it is released
from the tool. Lift the base plate and curved loading
channel away from the tool.
4. Clean the inside of the fastener guide with accessory
brush.
5. Lubricate the moving element of the magazine with
Hilti-Spray.
6. Remove the piston. Pull the catch and hold it. Pull
the piston guide upwards out of the tool. Release the
catch.
7. Use accessory wire brushes to clean all surfaces of
the piston guide, inside and outside.
8. Clean the cartridge chamber and the bore for the
power regulation pin with accessory round brush.
9. Lubricate the slider and the collar with Hilti lubricant
spray.
-NOTE-
Use of lubricants other than Hilti lubricant spray may
cause damage to rubber parts of the tool, especially the
buffer.
10.Push the piston into the piston guide and slide the
piston guide into the tool from above until the catch
engages.
11.Press the base plate and the curved loading channel
against the threaded section on the tool and rotate
it on in a clockwise direction until it is screwed on
as far as it will go.
12.Turn the base plate with the curved loading channel
back to its original position above the magazine.
13.Push the magazine back until it engages with the
curved section.
14.Lubricate the guiding rails of the tool with Hilti-Spray
applied through the cooling slits as illustrated.
8.3 Checking the tool after care and maintenance
After carrying out care and maintenance and before load-
ing the cartridges, check that all safety devices have been
fitted and that they function faultlessly.
-NOTE-
Use of lubricants other than Hilti lubricant spray may
cause damage to rubber parts of the tool, especially the
buffer.
Printed: 07.07.2013 | Doc-Nr: PUB / 5126874 / 000 / 00