Care And Maintenance - Hilti DX 351 BT Mode D'emploi

8. Care and maintenance

When this type of tool is used under normal operating
conditions, dirt and residues build up inside the tool
and functionally relevant parts are also subject to wear.
Regular inspections and maintenance are thus essen-
en
tial in order to achieve reliable operation. We recom-
mend that the tool is cleaned and the piston and piston
brake are checked at least weekly when the tool is sub-
jected to intensive use, and at the latest after driving
2,000 fasteners.
8.1 Care of the tool
Clean the tool:
After driving 2,000 studs
●
If cartridges misfire
●
If driving power is not constant
●
If moving parts do not operate freely
●
The outer casing of the tool is manufactured from
impact-resistant plastic. The grip comprises a synthetic
rubber section. The ventilation slots must be unob-
structed and kept clean at all times. Do not permit for-
eign objects to enter the interior of the tool. Use a slight-
ly damp cloth to clean the outside of the tool at regu-
lar intervals. Do not use a spray or steam-cleaning sys-
tem for cleaning.
8.2 Maintenance
Check all external parts of the tool for damage at regu-
lar intervals and check that all controls operate proper-
ly. 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.
-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.
The tool can get hot while operating.
●
You could burn your hands.
●
Do not disassemble the tool while it
●
is hot. Let the tool cool down.
8.3 Disassembling the tool
1. Check to ensure that no cartridge strip is in the tool.
If there is a cartridge strip in the tool, remove it by
pulling it upwards out of the tool from above.
2. Unscrew and remove the fastener guide.
8
Printed: 20.08.2013 | Doc-Nr: PUB / 5069825 / 000 / 02
-CAUTION-
3. Rotate the black housing counterclockwise through
one complete revolution (360°). This releases the pis-
ton stop.
4. Remove the piston from the tool.
-NOTE-
If the piston is jammed in the piston guide, the complete
piston guide must be removed from the tool.
5. Unscrew and remove the black housing completely
by turning it counterclockwise.
6. Press the piston guide against the tool with the palm
of the hand.
7. Pull the complete unit away from the tool.
8. Pull the black housing away from the piston guide.
9. Pull the piston out of the piston guide.
8.4 Checking the piston for wear
The piston must be replaced if it is:
– badly worn
– broken
– bent (check by rolling it on a flat surface).
-WARNING-
Should the tip of the piston become worn or damaged,
do not attempt to grind it off in order to permit further
use. This may negatively affect the quality of the fastening
obtained and may result in serious damage to the tool.
8.5 Cleaning the piston
1. Clean the piston with a flat brush.
2. Spray the piston lightly with Hilti spray.
8.6 Cleaning the fastener guide
1. Clean the fastener guide with a small round brush.
2. Spray the fastener guide lightly with Hilti spray.
8.7 Cleaning the cartridge strip guideway
1. Clean the right and the left cartridge strip guideway
with the scraper supplied.
8.8 Cleaning the piston guide
1. Clean the inside of the piston guide with a round brush
and the outside with a flat brush.
2. Clean the cartridge chamber and the power regulation
bore in the end of the piston guide.
3. Spray the inside and the outside of the piston guide
lightly with Hilti spray.
8.9 Cleaning inside the housing
1. Clean the inside of the housing with the flat brush.
2. Spray the housing lightly with Hilti spray.
8.10 Assembling the tool
1. Fit the black housing onto the piston guide.
2. Pull the black housing upwards against the spring
pressure and hold it securely in this position in your
hand.