Care And Maintenance - Hilti DX 351-CT Operating Instructions Manual

Check to ensure that the fastener is inserted correctly.
Any fasteners which fail to hold or are incorrectly driven
must be replaced.
Base material: Concrete
Fasteners: X‑CW C27; X‑CW C32; X‑CW U22; X‑CW U27
Fastening quality: The head of the nail must press the
sleeve against the working surface.
Nail stand-off: 5 ‑ 7 mm (0.2" ‑ 0.27")
7.4.3 Instructions for use of the X‑CC 7
Recommended fastener
X‑FG8ME‑351
Insert the X‑CC fastener in the fastener guide.
Check to ensure that the fastener is inserted correctly.
Any fasteners which fail to hold or are incorrectly driven
must be replaced.
Base material: Concrete
Fasteners: X‑CC C27; X‑CC27 C32; X‑CC27 U22;
X‑CC27 U27
Fastening quality: The head of the nail must press the
clip against the working surface.
Nail stand-off: 5 ‑ 7 mm (0.2" ‑ 0.27")
7.5 Changing the piston and piston brake 8 9
WARNING
All cartridges must be removed from the tool. Ensure
that there is no fastener in the fastener guide.
CAUTION
After the tool has been in use, the parts to be handled
may be very hot. It is essential that gloves are worn
if the following maintenance operations have to be
carried out before the tool has been allowed to cool
down.
NOTE
Firing the tool repeatedly without driving a fastener
stresses the piston and piston brake and causes these
parts to wear. If the piston shows signs of chipping and
/ or the synthetic rubber part of the piston brake is badly
worn, then these parts have reached the end of their life.

8 Care and maintenance

CAUTION
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. Reg-
ular inspections and maintenance are thus essential
in order to ensure reliable operation. We recommend
that the piston and piston brake are checked and in-
spected at least weekly when the tool is subjected to
Printed: 17.04.2014 | Doc-Nr: PUB / 5069829 / 000 / 03
guides: X‑FG8S351;
1. Pull the cartridge strip out of the tool at the cartridge
strip exit aperture.
2. Unscrew the fastener guide.
3. Rotate the black housing one complete revolution
(360°) in a counterclockwise direction.
This releases the piston stop.
4. Remove the piston from the piston guide and the
piston brake from the fastener guide.
NOTE If the piston is stuck inside the piston guide,
the complete piston guide must be removed (see
section "Cleaning").
5. Push the piston out by pushing through the cartridge
chamber.
NOTE Do not regrind the piston. The tool will be
damaged if the piston is shortened.
7.6 Cleaning 10 11
WARNING
Dirt and residues in DX tools contain substances that
may be hazardous to your health. Do not inhale dust /
or dirt from cleaning. Keep the dust or dirt away from
foodstuffs. Wash your hands after cleaning the tool.
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 equivalent
quality.
1. Pull the cartridge strip out of the tool at the cartridge
strip exit aperture.
2. Unscrew the black housing completely in a counter-
clockwise direction.
3. Push the piston guide back with the palm of the
hand to release the piston stop.
4. Remove the black housing from the piston guide.
5. Remove the complete assembly.
6. Clean the piston and fastener guide.
7. Clean the cartridge transport system.
8. Clean the inside and outside of the piston guide (rear
of the piston guide and spring area) and lubricate
the outside of these parts with Hilti lubricant spray.
9. Clean the cartridge chamber and the power regula-
tion bore on the end surface of the piston guide.
10. Clean the inside of the housing and spray it lightly
with Hilti lubricant spray.
intensive use, but at the latest after 3,000 fasteners
have been driven.
WARNING
The tool must be unloaded before carrying out care
and maintenance.
CAUTION
The tool may get hot during use. You could burn your
hands. Wear protective gloves when carrying out care
and maintenance. Allow the tool to cool down.
en
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