Operating Instruction DX 351 (01)

17
en
Contents Page
1. Safety precautions 17
2. General information 19
3. Technical description 19
4. Accessories, cartridges and fasteners 20
5. Technical data 21
6. Operation 22
7. Service (changing the piston and piston brake) 23
8. Care and maintenance 23
9. Assembly 24
10. Troubleshooting 25
11. Disposal 30
12. Manufacturer’s warranty – DX tools 30
13. EC declaration of conformity (original) 30
14. CIP approval mark 31
15. Health and safety of the user 31
Description of main parts 
쐃 Magazine housing
쐇 Nail pusher
쐋 Fastener feed delay device
쐏 Piston brake (part of fastener guide)
쐄 Threaded sleeve
쐂 Fastener guide
쐆 Piston return spring
쐊 Black housing
쐎 Trigger
쐅 Handle
쐈 Cartridge feeding
쐉 Cartridge ejection
씈 Grip
씉 Aeration slots
씊 Power regulation indicator
씋 Power regulation wheel
씌 Nail detector assy
ORIGINAL OPERATING INSTRUCTIONS
DX 351 powder-actuated tool
Tool components  Item no.
쐃 Fastener guide*
쐇 Piston brake (part of fastener guide)
쐋 Piston*
쐏 Piston return spring 331010
쐄 Piston guide 331203
쐂 Black housing 331027
쐆 Piston stopper right 331158
쐊 Piston stopper left 331045
* These parts may be replaced by the user/operator
It is essential that the operating instruc-
tions are read before the tool is operated
for the first time.
Always keep these operating instructions
together with the tool.
Ensure that the operating instructions are
with the tool when it is given to other per-
sons.
1. Safety precautions
1.1 Basic safety instructions
In addition to the safety precautions listed in the indi-
vidual sections of these operating instructions, the
following points must be strictly observed at all times.
1.2 Only use Hilti cartridges or cartridges of equiva-
lent quality
The use of cartridges of inferior quality in Hilti tools may
lead to build-up of unburned powder, which may explo-
de and cause severe injuries to operators and bystan-
ders. At a minimum, cartridges must either:
a) Be confirmed by their supplier to have been suc-
cessfully tested in accordance with EU standard EN
16264
NOTE:
● All Hilti cartridges for powder-actuated tools have
been tested successfully in accordance with EN 16264.
● The tests defined in the EN 16264 standard are system
tests carried out by the certification authority using
specific combinations of cartridges and tools.
The tool designation, the name of the certification aut-
hority and the system test number are printed on the
cartridge packaging.
or
b) Carry the CE conformity mark (mandatory in the EU
as of July 2013).
See packaging sample at:
www.hilti.com/dx-cartridges
1.3 Use as intended
The tool is designed for professional use in fastening
applications in construction where specially-designed
nails, threaded studs and composite fasteners are dri-
ven into concrete, steel and sand-lime block mason-
ry.