Hilti DX460 User manual

DX460
Operatinginstructions 17–32
*371665*
371665
en

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DX460
DX 460
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MX72 MX 72
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17
18

6.1 7.2
7.1
7.3
7.4
7.5
7.6
7.7
6.3
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XMX72
X-460-F8
X-460-F8N15
X-460-F8N10
X-460-F8S12
X-460-F8SS
X-460-F10
X-460-F810SS
X-460-FIE
X-DNI S/W S/W S/W S/W S
X-ZF S/W S/W S/W S/W
X-SL S/W S/W S/W S/W
X-EDNI S S S S
X-CR S S S
X-DAK S S S S
X-AL-H AL AL AL
X-FS S/W S/W
X-SW S/W S/W
X-M8/X-W8 ... P8 S S
X-M6/W6 ... P8 S S
X-M10/W10 ... P10 10 10
X-IE IE, IEA
S = X-460-P8
W = X-460-P8W
AL = X-460-P8AL
10 = X-460-P10
IE = X-460-PIE
IEA = X-460-PIEA

8.3
8.4
8.5
8.6
8.7
8.8 8.9
3
4
5
4
22
3
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1
2
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9.1
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8.13
8.12 2 1
3CLICK
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8.10 8.11

17
DX460 powder-actuated tool
Warning signs
General
warning Warning: hot surface
Description of main parts 
Exhaust gas piston return unit
Guide sleeve
Housing
Cartridge guideway
Power regulating wheel release button
Power regulation wheel
Trigger
Grip
Piston return unit release button
Ventilation slots
Piston rings
Piston *
Fastener guide *
Fastener guide release button
Buffer *
Magazine *
Magazine cover
Magazine cover release button
Magazine release button
* These parts may be replaced by the user/operator.
Obligation signs
Wear eye
protection Wear a safety helmet Wear ear protection
Symbols
Read the opera-
tion instructions
before use
It is essential that the operating
instructions are read before the
tool is operated for the first time.
Always keep these operating
instructions together with the tool.
Ensure that the operating instruc-
tions are with the tool when it is
given to other persons.
Contents Page
1. General information 17
2. Description 18
3. Accessories 19
4. Technical data 20
5. Safety precautions 21
6. Before use 22
7. Operation 22
8. Care and maintenance 24
9. Troubleshooting 26
10. Disposal 31
11. Warranty 31
1. General information
1.1 Indication of possible danger
WARNING
ThewordWARNINGisusedtodrawattentiontoapoten-
tially dangerous situation which could lead to severe
personal injury or death.
CAUTION
ThewordCAUTIONisusedtodrawattentiontoapoten-
tiallydangeroussituationwhichcouldleadtominorper-
sonalinjury or damage to the equipment or other prop-
erty.
1.2 Pictograms
The numbers refer to the illustrations. The illustra-
tions can be found on the fold-out cover pages. Keep
thesepagesopenwhileyoureadtheoperatinginstruc-
tions.
In these operating instructions, the designation “the
tool”alwaysreferstotheDX460powder-actuatedtool.
Location of identification data on the tool
Thetypedesignationand the serial number are printed
on the type plate on the tool. Make a note of this infor-
mation in your operating instructions and always refer
to it when making an enquiry to your Hilti representa-
tive or service department.
Type: DX460
Serial no.:

18
2. Description
The tool is designed for professional use in fastening
applicationswherenails,threadedstudsandcomposite
fasteners are driven into concrete, steel and sand-lime
block masonry.
The tool works on the well-proven piston principle and
is therefore not related to high-velocity tools. The pis-
tonprinciple provides anoptimum of workingand fas-
tening safety. The tool works with cartridges of 6.8/11
cal.
The piston is returned to the starting position and the
cartridges are fed to the firing chamber automatically
by gas pressure from the fired cartridge. This enables
you to fasten very quickly and economically with nails
and threaded studs. The use of a nail magazine greatly
increasesthe speed andconvenience of fasteningwith
thetool,aboveallwhenmakinglargenumbersofiden-
tical fastenings of all kinds.
As with all powder-actuated tools, the tool, magazine,
fastener program and cartridge program form a “tech-
nical unit”. This means that optimal fastening with this
system can only be assured if the fasteners and car-
tridges specially manufactured for it, or products of
equivalentquality, are used. The fastening and applica-
tionrecommendationsgivenbyHiltiareonlyapplicable
if these conditions are observed.
The tool features 5-way safety – for the safety of the
operator and bystanders.
The piston principle
Theenergyfromthepropellantchargeistransferredto
a piston, the accelerated mass of which drives the fas-
tener into the base material. As approximately 95 % of
thekineticenergyisabsorbedbythepiston,thefastener
isdrivenintothebasematerialatmuchreducedveloc-
ity (less than 100 m/sec.) in a controlled manner. The
driving process ends when the piston reaches the end
of its travel. This makes dangerous through-shots vir-
tually impossible when the tool is used correctly.
Thedrop-firingsafety deviceistheresultofcoupling
thefiringmechanismwiththecockingmovement.This
preventstheHiltiDXtoolfromfiringwhenitisdropped
ontoahardsurface, no matter at which angle the impact
occurs.
The trigger safety device ensures that the cartridge
cannot be fired simply by pulling the trigger only. The
tool can be fired only when pressed against the work
surface.
3
2
Thecontactpressuresafetydevice requiresthetool
to be pressed against the work surface with a signifi-
cantforce.Thetoolcanbefiredonly when pressed ful-
ly against the work surface in this way.
Inaddition, all Hilti DX tools are equipped with an unin-
tentional firing safety device . This prevents the tool
fromfiring if the trigger is pulled and the tool then pressed
againstthe work surface. The tool can be fired onlywhen
it is first pressed (1.) against the work surface correct-
ly and the trigger then pulled (2.).
5
4
1
2
4
2
5
3
1

19
3. Cartridges, accessories and fasteners
Cartridges
Ordering designation Colour code Power level
6.8/11 M green Green Low
6.8/11 M yellow Yellow Medium
6.8/11 M red Red Heavy
6.8/11 M black Black/purple Extra heavy
Accessories
Ordering designation Application
X-460-STAB Stabilizer –This rubber stabilizer should be mounted on the front of the standard fas-
tener guide whenever working conditions permit.
X-460-WH23/36 Washer holder –For fastening 23 and 36 mm steel washers with the magazine. The
washer holder can be mounted on the magazine.
X-PT 460 Pole tool extension –Extension system for various ceiling applications.
Magazine
MX 72 Magazine –For quick and convenient fastenings.
Fastener guides
Ordering designation Application
X-460-F8 Standard
X-460-F8N15 15 mm narrow –Improved accessibility
X-460-F8N10 10 mm narrow –Improved accessibility
X-460-S12 Fastener guide for fasteners with a 12 mm steel washer –higher pull over values
X-460-F8SS Stop spall for 8 mm studs –reduces spalling.
X-460-F10 For fastening 10 mm studs and nails.
X-460-F10SS Fastener guide for 10 mm studs –reduces spalling.
X-460-FIE For driving X-IE insulation fasteners.
Pistons
Ordering designation Application
X-460-P8 Standard piston
X-460-P8AL AL piston –Only for AL nails. Gives the nail better guidance and increases the applica-
tion limit.
X-460-P8W Wood piston –With a tapered point. For applications when overdriving the nail into
wood is desired. Allows proper piston return.
X-460-P10 10 mm piston –For fastening M 10 / W10 studs
X-460-PIE X-IE piston –For fastening X-IE insulation fasteners
X-460-PIEA X-IE approval-piston –For fastening approved X-IE insulation fasteners.
Safety accessory and cleaning set
Safety goggles, earplugs, Hilti spray, ramrod, flat brush, large round brush, small round brush, scraper, cleaning
cloth

20
Fasteners
Ordering designation Application
X-DNI, X-ZF Nails with differing application profile for a wide variety of fastenings.
X-SL Easily removable formwork nail for temporary fastenings
X-EDNI Magazined standard nails for efficient fastening to steel.
X-CR Stainless-steel nails for fastenings in damp or corrosive surroundings.
X-AL-H High-strength nails for fastening to steel and concrete of higher strength.
X-FS The ideal fastener to position formwork.
X-SW Flexible washer fasteners to fasten insulating foils / sheeting to concrete and steel.
23/36 mm Washers for Hilti nails: simple securing of joint seals, foils / sheeting and timber to
concrete and steel using the X-460 WH23/36 washer holder
X-(E)M/W/6/8 ... P8, Studs for bolted fastenings on concrete and steel.
X-M/W10 ... P10
For further equipment contact your local Hilti organisation.
4. Technical data
DX 460 tool
Weight 3.25 kg (7.16 lb),
3.51 kg (7.78 lb) with magazine
Tool length 458 mm (18.03″),
475 mm (18.7″) with magazine
Nail length Max. 72 mm (27/8″)
Recommended maximum fastening rate per hour 700/h
Cartridges 6,8/11 M (27 cal. short) green, yellow, red, black
Power regulation 4 cartridge power levels, regulation wheel with locking
function
MX 72 magazine
Weight 0.653 kg (1.44 lb)
Nail length Max. 72 mm (27/8″)
Magazine capacity Max. 13 nails
Right of technical changes reserved

21
5. Safety precautions
5.1 Basic safety instructions
In addition to the safety precautions listed in the indi-
vidual sections of these operating instructions, the fol-
lowing points must be strictly observed at all times.
5.2 Use as intended
The tool is designed for professional use in fastening
applicationsinconstructionwherenails,threadedstuds
andcomposite fasteners are driven into concrete, steel
and sand-lime block masonry.
5.3 Improper use
●Manipulation or modification of the tool is not per-
missible.
●Donotoperatethetoolinanexplosiveorflammable
atmosphere, unless the tool is approved for such use.
●To avoid the risk of injury, use only original Hilti fas-
teners,cartridges, accessories and spare parts or those
of equivalent quality.
●Observe the information printed in the operating
instructions concerning operation, care and mainte-
nance.
●Never point the tool at yourself or any bystander.
●Neverpressthemuzzleofthetoolagainstyourhand
or other part of your body.
●Do not drive nails into materials like glass, marble,
plastic, bronze, brass, copper, natural rock, insulation
material,hollow brick, glazed tile, thin-gauge sheet metal
(< 4 mm), grey cast iron, spheroidal cast iron and gas
concrete.
5.4 Technology
●This tool is designed with the latest available tech-
nology.
●Thetool and its ancillary equipment may present haz-
ards when used incorrectly by untrained personnel or
not as directed.
5.5 Making the workplace safe
●Avoid unfavourable body positions.
●Objectswhichcouldcauseinjuryshouldberemoved
from the working area.
●The tool is for hand-held use only.
●Keepotherpersons,childreninparticular,outside the
working area.
●Before using the tool, make sure that no one
is standing behind or below the point where fasteners
are to be driven.
●Keepthegripdry,clean and free from oil and grease.
5.6 General safety precautions
●Operate the tool only as directed and only when it is
in faultless condition.
●Usethe stabiliser/splinter guard when the application
permits.
●Ifacartridgemisfiresor fails to ignite, proceed as fol-
lows:
1. Keep the tool pressed against the working surface
for 30 seconds.
2. If the cartridge still fails to fire, withdraw the tool
from the working surface, taking care that it is not
pointed towards your body or bystanders.
3. Manually advance the cartridge strip one cartridge.
Use up the remaining cartridges on the strip.
Remove the used cartridge strip and dispose of it in
such a way that it can be neither reused nor mis-
used.
●Never attempt to pry a cartridge from the magazine
strip or the tool.
●Keep the arms flexed when the tool is fired (do not
straighten the arms).
●Never leave the loaded tool unattended.
●Always unload the tool before beginning cleaning,
servicing or changing parts and before storage.
●Storecartridgesandunusedtoolsunloaded,inadry,
high or locked place out of the reach of children.
5.7 Temperature
●Do not disassemble the tool while it is hot.
●Never exceed the recommended maximum fastener
driving rate (number of fastenings per hour). The tool
may otherwise overheat.
●Shouldthe plastic cartridgestrip begin tomelt, stop
using the tool immediately and allow it to cool down.
5.8 Requirements to be met by users
●The tool is intended for professional use.
●Thetoolmaybeoperated,serviced and repaired only
by authorised, trained personnel. This personnel must
beinformed of any special hazards that may be encoun-
tered.
●Proceed carefully and do not use the tool if your full
attention is not on the job.
●Stop working with the tool if you feel unwell.
5.9 Personal protective equipment
●Theoperatorandotherpersonsintheimmediatevicin-
itymustalwaysweareyeprotection,ahardhatandear
protection.

22
6. Before use

6.1 Tool inspection
●Ensure that there is no cartridge strip in the tool. If
there is a cartridge strip in the tool, remove it by hand
from the tool.
●Checkallexternalpartsof the tool for damage at reg-
ular intervals and check that all controls operate prop-
erly. Do not operate the tool when parts are damagedor
whenthecontrolsdonotoperateproperly.Ifnecessary,
have the tool repaired at a Hilti service centre.
●Check the buffer and piston for wear (see “8. Care
and maintenance”).
6.2 Choosing the right fastener guide / piston / fas-
tener combination
Useof the wrong combination may result in damage to
thetooland/oraffectfasteningquality(seetableonlast
page of these instructions).

6.3 Conversion from single-fastener tool to maga-
zine tool (changing the fastener guide)
1. Ensure that no cartridge strip is loaded in the tool.
Removeanycartridgestripbypullingitoutofthetool
by hand (see fig. 6.1).
2. Press the release button.
3. Unscrew the fastener guide.
4. Check the buffer and piston for wear (see "Care and
maintenance").
5. Push the piston into the tool as far as it will go.
6. Pressthebufferontothemagazineuntilitsnapsinto
place.
7. Pushthemagazinefirmlyontothepistonreturnunit.
8. Screw the magazine onto the tool until it engages.
7. Operation
CAUTION
■Thenail or stud is driven by a car-
tridge being fired.
■Excessivenoisemaydamagethe
hearing.
■Wear ear protection (users and
bystanders).
WARNING
■Thetoolisreadytofirewhenitis
pressedagainstapartofthebody
(e.g. hand).
■Thiscouldcauseanailtobedri-
ven into a part of the body.
■Neverpressthemuzzleofthetool
against parts of the body.
WARNING
Under certain circumstances, the
tool can be ready to fire when the
magazine is pulled back by hand.
■Thiscouldcauseanailtobedri-
ven into a part of the body.
■Neverpullthemagazineback by
hand.
CAUTION
■The base material may splinter
whenafastenerisdrivenorfrag-
mentsofthecartridgestrip may
fly off.
■Flyingfragments may injure parts
of the body or the eyes.
■Wear safety goggles and a hard
hat (users and bystanders).

23
WARNING
●Never attempt to drive a fastener in an existing hole
except where recommended by Hilti, e.g. when using
the DX Kwik system.
●Never attempt to redrive the same fastener.
●Never exceed the maximum fastener driving rate.

7.4 Reloading the single-fastener tool
1. Ensure that there is no cartridge strip in the tool. If
there is a cartridge strip in the tool, remove it by
pulling it upwards out of the tool.

7.5 Loading the magazine tool
1. Releasethemagazine cover by pressing the release
button.
2. Pull the magazine cover down as far as it will go.
3. Load a new nail strip into the magazine.
4. Push the magazine cover up until it snaps closed.
5. Load the cartridge strip (narrow end first) by push-
ingitinto the grip from below untilflush.If the strip
hasbeenpartlyused,pullitthroughuntilanunused
cartridgeis in the chamber.(The last visible number
onthebackofthecartridgestripindicateswhichcar-
tridge is next too be fired.)
X-DNI-nail (concrete/steel)
MD
ET SL
SD
SD MD
ETSL
Length of nails for steel
Penetration depth (ET) 22±5 mm
(nail point must protrude)
+material thickness (MD) = shank length
steel thickness (SD) = min. 4 mm,
max. 10 mm
Length of nail for concrete
Penetration depth (ET) 27±5 mm
+ material thickness (MD) = shank
length
Penetration depth (ET) 12±2 mm
+material thickness (MD)
= shank length (SL) min.
steel thickness (SD) = min. 4 mm
X-EDNI-nail (steel)
Penetration depth
concrete: 27±5 mm
steel: 12±2 mm
Threadedstudsforconcreteorsteel
BA
ET C
BA
d
C
Concrete
A = min. edge distance = 70 mm (23/4")
B = min. spacing = 80 mm (31/8")
C = min. base material thickness = 100 mm (4")
Steel
A = min. edge distance = 15 mm (5/8")
B = min. spacing = 20 mm (3/4")
C = min. base material thickness = 4 mm (5/32")
MD
ET SL

7.1 Loading the single-fastener tool
1. Insert the fastener (head first) until the washer is held
in the tool.
2. Loadthecartridgestrip(narrow end first) by insert-
ingitintothebottomofthetoolgripuntilflush.Ifthe
striphasbeenpartlyused,pullitthroughuntilalive
cartridgeis in the chamber.(The last visiblenumber
onthebackofthecartridgestripindicateswhichcar-
tridge is next to be fired.)

7.2 Adjusting the driving power
Start with the lowest cartridge power level and the tool
set at the lowest power setting.
1. Press the release button.
2. Turn the power regulation wheel to 1.
3. Drive a nail.
4. If the fastener doesn't penetrate deeply enough,
increase the power level and repeat steps 1 to 3.
Repeatuntil the desired depth of penetration is reached.
Use a more powerful cartridge if necessary.

7.3 Fastening with the single-fastener tool
1. Press the toolfirmlyagainsttheworksurfaceatright
angles.
2. Fire the tool by pulling the trigger.
Fastening guidelines
NOTE
These application recommendations must always be observed.
For more specific information, refer to the Hilti Fastening Technology Manual, which is available from your local
Hilti organisation.

24
CAUTION
■The tool can get hot while oper-
ating.
■You could burn your hands.
■Donot disassemble the tool while
it is hot. Let the tool cool down.
WARNING
●Allnails in the magazine mustbeof the same length.

7.6 Fastening with the magazine tool
1. Press the toolfirmlyagainsttheworksurfaceatright
angles.
2. Fire the tool by pulling the trigger.
WARNING
●Never attempt to drive a fastener in an existing hole
except where recommended by Hilti, e.g. when using
the DX Kwik system.
●Never attempt to redrive the same fastener.
●Never exceed the maximum fastener driving rate.

7.7 Unloading the magazine tool
1. Ensure that there is no cartridge strip in the tool. If
thereis a cartridge strip in the tool, remove it by pulling
it upwards out of the tool.
2. Release the magazine cover by pressing the release
button.
3. Pull the magazine cover down as far as it will go.
4. Ensure that there is no nail strip in the magazine.
5. Push the magazine cover up until it snaps closed.
8. Care and maintenance
8.1 Care of the tool
Theouter casing of the tool is manufactured from impact-
resistantplastic.Thegripcomprisesasyntheticrubber
section.
The ventilation slots must be unobstructed and kept
cleanat all times. Do not permit foreign objects to enter
theinteriorofthetool.Useaslightlydampclothtoclean
theoutside of the tool at regular intervals. Do not usea
spray or steam-cleaning system for cleaning.
8.2 Maintenance
Check all external parts of the tool for damage at regu-
larintervals and check that all controls operate proper-
ly. Do not operate the tool when parts are damaged or
whenthecontrolsdonotoperateproperly.Ifnecessary,
have the tool repaired at a Hilti service centre.
Servicing the tool
The tool should be serviced if:
1. Cartridges misfire
2. Fastener driving power is inconsistent
3. If you notice that:
●contact pressure increases,
●trigger force increases,
●power regulation is difficult to adjust (stiff),
●the cartridge strip is difficult to remove.

8.3 Disassemble the tool
1. Ensure that there is no cartridge strip in the tool. If
thereis a cartridge strip in the tool, remove it by pulling
it upwards out of the tool.
2. Press the release button at the side.
3. Unscrew the fastener guide / magazine.
4. Remove the buffer by bending it away from the fas-
tener guide / magazine.
5. Remove the piston.

8.4 Check the buffer and piston for wear
Replace the buffer if:
●the metal ring is loose or broken,
●the buffer no longer holds on the fastener guide,
●excessive, uneven wear beneath the metal ring is
noticed.
Replace the piston if:
●it is broken,

25
●thetip is heavily worn (i.e. a 90°segmentis chipped
off),
●piston rings are broken or missing,
●it is bent (check by rolling on an even surface).
NOTE
Do not use worn pistons. Do not modify or grind pis-
tons.

8.5 Clean the piston rings
1. Clean the piston rings with the flat brush.
2. Spray the piston rings lightly with Hilti spray.

8.6 Clean the threaded section of the fastener guide/
magazine
1. Clean the thread with the flat brush.
2. Spray the thread lightly with Hilti spray.

8.7 Disassemble the piston return unit
1. Press the release button at the gripping part.
2. Unscrew the piston return unit.

8.8 Clean the piston return unit
1. Clean the spring with the flat brush.
2. Clean the front end with the flat brush.
3. Use the small round brush to clean the two holes at
the end face.
4. Spray the piston return unit lightly with Hilti spray.

8.9 Clean inside the housing
1. Use the large round brush to clean inside the hous-
ing.
2.SpraytheinsideofthehousinglightlywithHiltispray.

8.10 Clean the cartridge strip guideway
Usethescraperprovidedtocleantherightandleftcar-
tridgestrip guideways. The rubber cover must be lifted
slightly to facilitate cleaning of the guideway.

8.11 Spray the power regulation wheel lightly with
Hilti spray

8.12 Fit the piston return unit
1. Bring the arrows on the housing and on the exhaust
gas piston return unit into alignment.
2.Push the piston return unit into the housing as far as
it will go.
3. Screw the piston return unit onto the tool until it
engages.

8.13 Assemble the tool
1. Push the piston into the tool as far as it will go.
2. Press the buffer onto the fastener guide / magazine
until it snaps into place.
3. Press the fastener guide / magazine firmly onto the
piston return unit.
4. Screw the fastener guide / magazine onto the tool
until it engages.

8.14 Checking the tool following care and mainte-
nance
After carrying out care and maintenance on the tool,
checkthat all protective and safety devices are fitted and
that they function correctly.
NOTE
●Theuse of lubricants other than Hilti spray could dam-
age rubber parts, especially the buffer.

Cartridge strip cannot be
removed
26
9. Troubleshooting
Piston is stuck in the base
material
Cartridge not transported
Cause
■Fastener too short
■Fastener without washer
■Driving power too high
■Damaged cartridge strip
■Carbon build up
■Tool damaged
■Tool overheated because of high
setting rate
■Tool damaged
WARNING
Never attempt to pry a cartridge
from the magazine strip or tool.
■Bad cartridge
■Carbon build-up
WARNING
Never attempt to pry a cartridge
from the magazine strip of the tool.
Possible remedies
■Remove cartridge strip and use
pushrod provided to push piston
fully back (See 9.1)
■Use longer fastener
■Use fastener with washer for
wood applications
■Reduce power setting
•Power regulation
•Lower cartridge power level
■Change cartridge strip
■Clean the cartridge strip guide-
way (see 8.10)
If the problem persists:
■Contact Hilti Repair Centre
■Let the tool cool down and then
carefully try to remove the
cartridge strip
If not possible:
■Contact Hilti Repair Centre
■Manually advance the cartridge
strip one cartridge
If the problem occurs more
often: Clean the tool
If the problem persists:
■ Contact Hilti Repair Centre
■Tool is compressed too long
while fastening.
■Fastening frequency is too high
■Compress the tool less long
while fastening.
■Remove the cartridge strip
■Disassemble the tool (see 8.7)
for fast cooling and to avoid
possible damage
If the tool cannot be disassembled:
■Contact Hilti Repair Centre
Cartridge strip melts
Cartridge cannot be fired

Piston is stuck in the piston return
unit and cannot be removed
Cartridge falls out of the
cartridge strip
27
The operator notices:
– increased contact pressure
– increased trigger force
– power regulation stiff to adjust
– cartridge strip is difficult to
remove
■ Fastening frequency is too high
WARNING:
Never attempt to pry a cartridge
from the magazine strip or tool.
■Carbon build-up
■Immediately discontinue using
the tool and let it cool down
■Remove cartridge strip
■Let the tool cool down.
■Clean the tool and remove loose
cartridge.
If it is impossible to disassemble
the tool:
■Contact Hilti Repair Centre
■Clean the tool
(see 8.3–8.13)
■Incorrect piston position
■Carbon build-up
■Remove cartridge strip and use
enclosed pushrod to push piston
fully back (see 9.1)
If problem persists:
■Clean the tool
(see 8.3–8.13)
■Check piston and buffer, replace
if necessary (see 8.4)
Varying depths of penetration
Misfire: the nail is only partly
driven into the base material ■Incorrect piston position
■Bad cartridge
■Remove cartridge strip and use
enclosed pushrod to push piston
fully back (see 9.1)
If problem persists:
■Change cartridge strip (possibly
use a new/dry package)
■Clean the tool (see 8. –8.13)
■Damaged piston
■Buffer debris inside the piston
return unit
■Damaged buffer
■Carbon build-up
■Remove cartridge strip
■Unscrew piston return unit and
push out the piston through the
cartridge chamber using the
pushrod provided
■Check buffer and piston, if
necessary, change (see 8.4)
■Clean the tool
(see 8.3–8.13)
Cause Possible remedies

Magazine fastener guide is stuck
Piston stuck in magazine fastener
guide
Trigger cannot be pulled
Piston return unit is stuck
28
■Carbon build-up ■Manually pull the front part of
the piston return unit out of the
tool
■Clean the tool
(see 8.3–8.13)
If the problem persists:
■Contact Hilti Repair Centre
■Incorrect piston position
■Tool not fully compressed
■Safety mechanism activated
because:
–Magazine not loaded
–Plastic debris inside the
magazine
–Incorrect piston position
–Nail incorrect positioned in
magazine
■Piston and/or buffer damaged
■Plastic debris inside the
magazine
■Excess power when fastening on
steel
■Tool fired with high power
without fastener in place
■Fastener guide damaged
■Remove cartridge strip and use
enclosed pushrod to push piston
fully back (see 9.1)
If problem persists:
■Clean the tool (see 8.3–8.13)
■Release the tool and fully com-
press it again
■Load fastener strip
■Openmagazine, remove fastener
strip and plastic debris
■Remove cartridge strip and use
pushrodprovidedtopush piston
fullyback(see9.1)
If problem persists:
■Clean the tool (see 8.3–8.13)
■Unscrew the magazine
■Check buffer and piston and
replace if necessary (see 8.4)
■Openmagazine, remove fastener
strip and plastic debris
■Change magazine
The tool fires but no nail is driven
Cause Possible remedies

Damaged nail head
29
Fastener does not penetrate
deeply enough
Fastener penetrates too deeply ■Fastener too short
■Driving power too high
■Fastener too long
■Driving power too low
■Use longer fastener
■Reduce power setting
■Use lighter cartridge
■Use shorter fastener
■Increase power setting
■Use heavier cartridge
Base material is spalling
Nail bends ■Hard and/or large aggregate in
concrete
■Rebar close to surface of
concrete
■Hard surface (steel)
■High strength concrete
■Hard and/or large aggregate in
concrete
■Old concrete
■Use shorter nail
■Use thicker nail DNI => AL
■Use DX-Kwik (predrill)
■Use co-acting principle/fastener
guide
■Use stepped shank nail DAK
or X-ZFAH
■Stud application
Use spall stop:
X-SS....
■Nail application
Use shorter nail
Use DX-Kwik (predrill)
Use DAK16 or X-ZFAH16
(for high-strength precast
concrete)
■Driving power too high
■Wrong piston used
■Damaged piston
■Reduce power setting
■Use lighter cartridge
■Check nail/piston combination
■Change piston
Cause Possible remedies

30
Nail head penetrates through
material fastened (metal sheet)
Damaged nail head
Nail breaks
Nail does not hold in base
material
Nail does not
penetrate surface ■Driving power too low
■Application limit exceeded
(very hard surface)
■Unsuitable system
■Thin steel base
(3 to 5 mm steel)
■Driving power too low
■Application limit exceeded
(very hard surface)
■Driving power too high
■Driving power too high
■Wrong piston used
■Worn-out piston
■Try higher power setting or heavier
cartridge
■Short nail application:
try DAK 16 P8 (TH) or
X-ZFAH 16 S8 TH
■Long nail application:
try DAA or X-AL-H
■Use co-acting principle/fastener
guide
■Switch to more powerful system
like DX 750, DX 600 N
■Try different power setting or
different cartridge
■Try EDNK 20P8H or
ENKK 20-S12 for fastening sheet
metal
■Try ESD MK...MA for fastening
wood
■Try higher power setting or
heavier cartridge
■Use shorter nail
■Use stronger nail (X-...-H)
■Use stepped shank nail:
DAK 16 P8 (TH) or
X-ZFAH 16 S8 TH
■Reduce power setting
■Use lighter cartridge
■Use nail with Top Hat
■Use nail with washer e.g.
EDNI ... S12
■Reduce power setting
■Use lighter cartridge
■Check nail/piston combination
■Change piston
Fastening on steel Cause Possible remedies

31
10. Disposal
Most of the materials from which Hilti power actuated tools are manufactured can be recycled. The materials
must be correctly separated before they can be recycled. In many countries, Hilti has already made arrange-
ments for taking back your old powder actuated tools for recycling. Please ask your Hilti customer service
department or Hilti sales representative for further information.
Should you wish to return the power actuated tool yourself to a disposal facility for recycling, proceed as fol-
lows: Dismantle the tools as far as possible without the need for special tools.
Separate the individual parts as follows:
Part / assembly Main material Recycling
Toolbox Plastic Plastics recycling
Outer casing Plastic / synthetic rubber Plastics recycling
Screws, small parts Steel Scrap metal
Used cartridge strip Plastic / steel According to local regulations
11. Warranty
Hilti warrants that the tool supplied is free of defects in
material and workmanship. This warranty is valid so
longas the tool is operated and handled correctly, cleaned
and serviced properly and in accordance with the Hilti
Operating Instructions, all warranty claims are made
within 5 years for the tool and 1 year for the fastener
magazine and fastener guide from the date of the sale
(invoice date), and the technical system is maintained.
This means that only original Hilti consumables, com-
ponents and spare parts, or other products of equiva-
lent quality, may be used in the tool.
This warranty provides the free-of-charge repair or
replacementofdefectivepartsonly.Partsrequiringrepair
or replacement as a result of normal wear and tear are
not covered by this warranty.
Additional claims are excluded, unless stringent nation-
al rules prohibit such exclusion. In particular, Hilti is
not obligated for direct, indirect, incidental or conse-
quential damages, losses or expenses in connection
with, or by reason of, the use of, or inability to use the
tool for any purpose. Implied warranties of mer-
chantability or fitness for a particular purpose are
specifically excluded.
Forrepairorreplacement,send tool and/or related parts
immediatelyupon discovery of the defect to the address
of the local Hilti marketing organisation provided.
This constitutes Hilti's entire obligation with regard to
warrantyandsupersedesallpriororcontemporaneous
comments and oral or written agreements concerning
warranties.
Confirmation of CIP testing
TheHiltiDX460hasbeensystemandtypetested.Asa
result, the tool bears the PTB approval mark of square
shapeshowingapprovalnumberS 812.Inthisway, Hilti
guarantees compliance with the approved type.
Unacceptable/inadmissible defects, deficiencies, etc.
thataredeterminedduringuseofthetoolmustbereport-
ed to the manager responsible at the approval authori-
ty(PTB) and to the Office of the Permanent International
Commission (C.I.P.).