Hilti DX351-CT User Manual

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DX 351-CT

*388037*

388037

Hilti Corporation

LI-9494 Schaan Tel.:+423 /234 2111 Fax: +423/2342965 www.hilti.com

388037 / A

Operating instructions en Mode d’emploi fr Manual de instrucciones es Manual de instruções pt

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456 7

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91011

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ORIGINAL OPERATING INSTRUCTIONS

DX 351‑CT Direct fastening tool

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 instructions are with the tool when it is given to other persons.

Contents Page

1. General information 1

2. Description 2

3. Consumables 3

4. Technical data 3

5. Safety instructions 4

6. Before use 6

7. Operation 7

8. Care and maintenance 9

9. Troubleshooting 9

10. Disposal 11

11. Manufacturer’s warranty - tools 11

12. Confirmation of CIP testing 11

1 These numbers refer to the corresponding illustrations. The illustrations can be found on the fold-out cover pages. Keep these pages open while studying the operating instructions. In these operating instructions, the designation “the tool” always refers to the DX 351‑CT powder-actuated tool with grip.

Parts, operating controls and indicators 1

Magazine housing

Nail pusher

;

Fastener feed delay device

Piston brake (part of fastener guide)

Threaded sleeve

Fastener guide

(

Piston return spring

)

Black housing

Trigger

Grip

Cartridge feed

Cartridge ejection

Grip cover

Ventilation slots

Power regulation indicator

Power regulation wheel

Nail detector

1. General information

1.1 Safety notices and their meaning

DANGER

Draws attention to imminent danger that could lead to serious bodily injury or fatality.

WARNING

Draws attention to a potentially dangerous situation that could lead to serious personal injury or fatality.

CAUTION

Draws attention to a potentially dangerous situation that could lead to slight personal injury or damage to the equipment or other property.

NOTE

Draws attention to an instruction or other useful information.

1.2 Explanation of the pictograms and other information

Warning signs

General warning

Warning: explosive

substances

Warning: hot

surface

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Obligation signs

Wear eye

protection

Symbols

Read the

operating

instructions

before use

2. Description

Wear a hard

hat

Wear ear

protection

Wear

protective

gloves

Location of identification data on the tool

The type designation and serial number can be found on the type identification plate on the tool. Make a note of this data in your operating instructions and always refer to it when making an enquiry to your Hilti representative or service department.

Type:

Generation: 01

Serial no.:

2.1 Use of the product as directed

The Hilti DX 351‑CT is a powder-actuated tool designed for driving nails into concrete, steel and other materials suitable for DX fastening (see Fastening Technology Manual). The tool utilizes a captive piston to provide optimum functional reliability and working safety. The tool features automatic piston return and cartridge transport powered by gas pressure resulting from operation of the tool. Nails of up to 37 mm in length can thus be driven very quickly and efficiently. As with all powder-actuated fastening tools, the tool, the fastener guide, the grip, the fasteners and the cartridges form a single “technical unit”. This means that trouble-free fastening with this system can be assured only if fasteners and cartridges specially manufactured for it, or products of equivalent quality, are used. The fastening and application recommendations given by Hilti apply only when these conditions are observed. The tool is designed for professional use and may be operated, serviced and maintained only by trained, authorized personnel. This personnel must be informed of any special hazards that may be encountered. The tool and its ancillary equipment may present hazards when used incorrectly by untrained personnel or when used not as directed. To avoid the risk of injury use only genuine Hilti fasteners, cartridges, accessories and spare parts or those of equivalent quality. Modification of the tool is not permissible.

2.2 Through-shot and ricochet safety device

As a result of the piston principle, the DX 351-CT is classified as a low-velocity tool. Most excess driving energy is dissipated inside the tool.

2.3 Drop-firing safety device

The drop-firing safety device is the result of coupling the firing mechanism with the cocking movement. This helps prevent the tool firing when dropped onto a hard surface, no matter at which angle the impact occurs.

2.4 Trigger safety device

The trigger safety device prevents the tool firing when only the trigger is pulled. The tool can be fired only when it is pushed fully against the ceiling and the grip pressed.

2.5 Contact pressure safety device

The contact pressure safety device prevents the tool firing unless it is firmly pressed against a surface. The tool can be fired only when pressed fully against a surface with a force of at least 140 N.

2.6 Gravitation safety device

The gravitation safety device prevents the tool firing when in a horizontal position or when pointing toward the floor. The tool can be fired only when pointing in a generally upward direction toward the ceiling.

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3. Consumables

DX 351-CT powder-actuated fastening tool Ordering designation Fasteners

Grip unit X‑PT CT‑351 Main unit Standard piston X‑P8‑351 CT X‑U, X‑C DX 351 piston Standard fastener guide X 351‑F8CT X‑CW, X‑CC27 DX 351 fastener guide X‑FG8S351 X‑CC27, X‑HS, X‑U, X‑C ME fastener guide X‑FG8ME‑351 X‑CC27, X‑HS, X‑U, X‑C Magazine (only with X‑P8S‑351 piston) Spall guard X‑351‑CT

Standard accessories Ordering designation

Toolbox Cleaning set Protective glasses Ear protectors small Hilti spray 66 ML

Additional accessories Ordering designation

3FT extension 1FT extension Woven fabric shoulder bag X‑PT CT

Cartridge type Ordering designation

Heavy 6.8/11 M red Medium 6.8/11 M yellow Light 6.8/11 M green

DX 351‑CT

X‑P8S‑351 X‑U, X‑C

X‑M27/ X‑M32

DX 351‑CT DX 351 I‑VO 805 clear

X‑PT CT‑ X‑PT CT‑351 1FT

X‑U MX, X‑C MX, X‑SMX

351 3FT

4. Technical data

Right of technical changes reserved.

Description Weight Dimensions (L x W x H)

DX 351‑CT tool (main unit, piston, fastener guide)

X‑PT CT‑351 grip

3FT extension 0.5 kg (1.2 lb) 915 mm (36.02 in) x Ø30 mm

1FT extension 0.2 kg (0.5 lb) 288 mm (11.34 in) x Ø30 mm

2.7 kg (5.95 lb) 545 mm (21.46 in) X 55 mm (2.17 in) X 164 mm (21.4" x 6.4" x

2.1")

0.9 kg (2 lb) 935 mm (36.81 in) x Ø35.5 mm (36.8" x 1.4")

(36" x 1.2")

(12" x 1.2")

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DX 351‑CT tool

Contact movement Trigger force Ambient operating temperature range

NOTE

Noise information in accordance with Machinery Directive 98/37/EC of 22 June 1998. The characteristic values given are the A-weighted sound power level and the A-weighted workplace-related emission value (without pulse allowance) in accordance with section 1.7.4.f of the directive. The measuring technique used complies with DIN 45635 part 34 - measurement of noise emitted by powder-actuated tools. Subject of the measurement and conditions applicable: Fastening 1 mm sheet metal to concrete using an X‑ZF32 P8 nail, a 6.8/11 M red cartridge (power level 3 as per DIN 45635, part 34 “Measurement of airborne noise emitted by machines, enveloping surface method applied to powder-actuated tools”.

Noise information

Noise (power) level, L Workplace-relevant emission value, L

Additional information Other applications may produce noise values which

WA, 1S

pA, 1s

62 mm (2.4") 140…320 N

-15…+45°C (5°F to 113°F)

111 dB (A) 104 dB (A)

deviate from the given values.

5. Safety instructions

5.1 Basic information concerning safety

a) In addition to the information relevant to safety

given in each of the sections of these operating instructions, the following points must be strictly observed at all times.

b) Never attempt to use the tool without first receiv-

ing proper instruction on its use and observance of the associated safety precautions. Contact

your local Hilti representative for assistance.

5.1.1 Personal safety

a) Stay alert, watch what you are doing and use

common sense when operating a direct fastening tool. Do not use tool while tired or under the influence of drugs, alcohol or medication. A

moment of inattention while operating tools may result in serious personal injury.

b) Avoid unfavorable body positions. Make sure you

work from a safe stance and stay in balance at all times.

c) Never point the tool toward yourself or other

persons.

d) Never press the nosepiece of the tool against

your hand or against any other part of your body (or other person’s hand or part of their body).

e) Keep other persons, especially children, away

from the area in which the work is being carried out.

f) Keep the arms slightly bent while operating the

tool (do not straighten the arms).

5.1.2 Use and care of powder-actuated fastening tools

a) Use the right tool for the job. Do not use the tool

for purposes for which it was not intended. Use it only as directed and when in faultless condition.

b) Always hold the tool securely with both hands

on the gripping section. Do not hold the exposed metal pole of the extensions. This may cause the

tool to malfunction.

c) Press the tool against the working surface at

right angles.

d) Never leave a loaded tool unattended. e) Always unload the tool (remove cartridges and

fasteners) before cleaning, before maintenance, before work breaks and before storing the tool.

f) Check the tool or machine and its accessories

for any damage. Guards, safety devices and any slightly damaged parts must be checked carefully to ensure that they function faultlessly and

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as intended. Check that moving parts function correctly without sticking and that no parts are damaged. All parts must be fitted correctly and fulfill all conditions necessary for correct operation of the tool or machine. Damaged guards, safety devices and other parts must be repaired or replaced properly at a Hilti service center unless otherwise indicated in the operating instructions.

g) Always hold the tool securely and at right angles

to the working surface when driving in fasteners. This will help to prevent fasteners being deflected by the working surface.

h) Never use a fastener twice. i) Never redrive a fastener. This may cause the

fastener to break and the tool may jam.

j) Never drive fasteners into existing holes unless

this is recommended by Hilti.

k) Always observe the application guidelines. l) Use the spall guard when the application per-

mits.

m)Never pull the magazine or fastener guide back

by hand as this could, under certain circumstances, make the tool ready to fire. This could cause a fastener or the piston to be driven into a part of the body.

n) Do not dismantle the tool while it is hot. o) The applicable national regulations, especially

those concerning accident prevention, must be observed.

5.1.3 Work area safety

a) Ensure that the workplace is well lit. b) Operate the tool only in well-ventilated working

areas.

c) Do not attempt to drive fasteners into unsuitable

materials: Materials that are too hard, e.g. welded

steel and cast iron. Materials that are too soft, e.g. wood and drywall panel (gypsum board). Materials that are too brittle, e.g. glass and ceramic tiles. Driving a fastener into these materials may cause the fastener to break, shatter or to be driven right through.

d) Do not use the tool on surfaces with a fire

protection coating thicker than 12 mm (½").

Using the tool on surfaces with a fire protection coating may cause the tool to malfunction.

e) Never attempt to drive fasteners into materials

such as glass, marble, plastic, bronze, brass, copper, rock, insulation material, hollow brick, ceramic brick, thin sheet metal (< 2.7 mm), cast iron or cellular concrete.

f) Before driving fasteners, check that no one is

present immediately behind the working surface.

g) Keep the workplace tidy. Objects which could

cause injury should be removed from the working area. Untidiness at the workplace can lead to

accidents.

h) Keep the grips dry, clean and free from oil and

grease.

i) Wear non-skid shoes. j) Take the influences of the surrounding area into

account. Do not expose the tool to rain or snow and do not use it in damp or wet conditions. Do not use the tool where there is a risk of fire or explosion.

5.1.4 Mechanical safety precautions

a) Select the correct fastener guide and fastener

combination for the job on hand. Failure to use

the correct combination of these items may result in injury or cause damage to the tool and/or lead to unsatisfactory fastening quality.

b) Use only fasteners of a type approved for use

with the tool.

c) Never fill the magazine with fasteners unless it

is correctly installed onto the tool. The fasteners could be ejected uncontrollably.

d) Never use worn or damaged piston brakes and do

not attempt to manipulate or modify the piston.

5.1.5 Thermal safety precautions

a) If the tool has overheated, allow it to cool down. b) Always wear gloves if the tool has to be disman-

tled for cleaning or maintenance before it has been allowed to cool down.

c) The tool must be allowed to cool down if melting

of the plastic cartridge strip is observed.

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5.1.6 Electrical safety precautions

Keep your hands on the black gripping section and avoid electric cables (risk of electric shock). Regularly check to ensure the gripping section and extension are in good condition.

5.1.7 Danger of explosion

a) Use only cartridges of a type approved for use

with the tool.

b) Remove the cartridge strip from the tool care-

fully.

6. Before use

NOTE

Read the operating instructions before the tool is operated for the first time.

6.1 Check the tool

Check that no cartridge strip is loaded in the tool. If a cartridge strip is present in the tool, remove the strip by pulling it out.

c) Do not attempt to forcibly remove cartridges from

the magazine strip or tool.

d) Unused cartridges must be stored in a dry, high

place, locked up or out of reach of children.

5.1.8 Personal protective equipment

The user and any other persons in the vicinity must wear suitable eye protection, a hard hat, safety shoes, ear protection and protective gloves while the tool is in use or when checking for faults etc. The user must also wear protective gloves.

Check all external parts of the tool for damage and check that all controls operate faultlessly. Do not operate the tool when parts are damaged or when the controls do not function correctly. If necessary, have the tool repaired at an authorized Hilti service center. Check the piston and piston brake for wear and ensure that the parts have been fitted correctly. Check for correct operation of the gravitation safety device by pressing the tool overhead several times against a hard surface . A click should be heard as the firing pin releases. Repeat the procedure with the tool pressed against a hard surface on the wall and floor. In these positions, there should be no audible click (the tool should not actuate).

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7. Operation

CAUTION Never push back the fastener guide with the palm of the hand, with any other part of the body or with the nail as this presents a risk of injury.

WARNING Driving a fastener may cause flying fragments. The user of the tool and bystanders must wear protective glasses and a hard hat. Flying fragments present a

risk of injury to the eyes and body.

CAUTION

The fastener driving action is initiated by ignition of a propellant charge. The user of the tool and

other persons in the immediate vicinity must wear ear protectors. Exposure to noise can cause hearing

loss.

WARNING

Making the tool ready to fire by pressing it against a part of the body (e.g. the hand) should never be done. This could cause a nail or the piston to be driven into a part of the body. Never press the tool against a

part of the body.

7.1 Fitting the grip to the tool 2

CAUTION Unless national or local regulations specify a shorter length, a maximum of 3 extensions (3 FT and / or 1 FT extensions) may be fitted between the grip and the tool in order to reach high ceilings. The maximum permissible total length of all extensions (not including the grip) is 9 FT (9 feet).

CAUTION Check that the grip and extension are fitted correctly.

Push the forward end of the grip onto the tool.

7.2 Operation 34

CAUTION Keep your hands on the black gripping section and avoid electric cables (risk of electric shock). Regularly check to ensure the gripping section and extension are in good condition.

CAUTION If the tool has overheated, allow it to cool down.

1. Insert the fastener.

2. Push the cartridge strip, narrow end first, into the grip of the tool from below until flush with the grip. NOTE If the cartridge strip is already partly used, pull it through by hand until an unused cartridge is in position in the cartridge chamber.

3. Adjust the driving power by turning the regulating wheel (1 = minimum power, 2 = medium power, 3 = maximum power). Start with minimum power. Increase the power if the fastener does not penetrate deep enough.

4. Position the tool perpendicular to the ceiling.

5. Fire the tool and drive the fastener by pushing the grip toward the ceiling.

7.3 Changing the equipment 5

1. Pull the cartridge strip out of the tool at the cartridge strip exit aperture.

2. Push the fastener guide firmly against the piston guide and then screw it on in a clockwise direction until it engages.

7.4 Application guidelines

NOTE

For detailed information, please ask your local Hilti representative for a copy of the applicable technical guidelines or national technical regulations.

7.4.1 Procedure if a cartridge fails to fire

If a cartridge fails to fire or misfires, always proceed as follows: Keep the tool pressed at right angles against the working surface for 30 seconds.

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If the cartridge still fails to fire, withdraw the tool from the working surface, taking care to avoid pointing it toward your body or toward bystanders. Load the next cartridge on the strip by cycling the tool. Use up the remaining cartridges on the strip and

remove the used cartridge strip from the tool. The (partly) used cartridge strip must then be disposed of appropriately to prevent further use or misuse of any unfired cartridges.

7.4.2 Instructions for use of the X‑CW 6

Recommended fastener guides: X‑351‑F8CT Use of the X‑CW fastener with other DX351 fastener guides may result in poorer fastening quality (higher rate of failure). Insert the X‑CW 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. Recommended nail stand-off Material: Concrete Fastener: 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 guides: X‑351‑F8CT; X‑FG8S351; 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. Recommended nail stand-off Material: Concrete Fasteners: X‑CC27 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 89

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.

NOTE

The condition of the piston and piston brake must be checked at regular intervals and at least daily.

1. Pull the cartridge strip out of the tool at the cartridge strip exit aperture.

2. Unscrew and remove the fastener guide (or fastener magazine).

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 remove the piston brake from the fastener guide (or nail magazine). 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  

CAUTION

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 counterclockwise 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.

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5. Remove the complete assembly.

6. Clean the piston and the fastener guide (or magazine).

7. Clean the cartridge transport system.

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. Regular inspections and maintenance are

thus essential in order to ensure reliable operation. We recommend that the piston and piston brake are checked and inspected at least weekly when the tool is subjected to 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.

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 regulation bore on the end surface of the piston guide.

10. Clean the inside of the housing and spray it lightly with Hilti lubricant spray.

8.1 Care of the tool

Clean the outside of the tool at regular intervals with a slightly damp cloth.

NOTE

Do not use a spray or steam/water jet system for cleaning. Never operate the tool when the ventilation slots are blocked. Do not permit foreign objects to enter the interior of the tool.

8.2 Maintenance

Check all external parts of the tool for damage at regular intervals and check that all controls operate faultlessly. Do not operate the tool if parts are damaged or when the controls do not function faultlessly. If necessary, the tool should be repaired by Hilti Service.

8.3 Checking the tool after care and maintenance

After carrying out care and maintenance and before loading the cartridges, check that all safety devices have been fitted and that they function faultlessly.

9. Troubleshooting

WARNING

The tool must be unloaded (cartridges and fasteners removed from the tool) before carrying out cleaning or maintenance.

Fault Possible cause Remedy

Cartridges are not transported.

The cartridge strip is damaged. Incorrect use of the grip.

The tool is damaged.

Change the cartridge strip. Use the grip correctly.

See section: 7.2 Operation 34 Contact Hilti.

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Fault Possible cause Remedy

The fastener is driven too deep.

The fastener is not driven deep enough.

The tool remains compressed (does not extend to original state when pressure is released).

The cartridge doesn’t fire. The tool is not pressed fully against

Big drop in driving power.

The piston guide jams.

Compression force is too high. Cartridge transport system. Spray Hilti lubricant spray (from

The tool cannot be fired even when fasteners and cartridges are inserted correctly.

Fastener driving power is too high.

Fastener driving power is too low.

The tool is fouled with dirt and residues. The piston is broken.

The tool is damaged. The tool is fouled with dirt and

residues.

the working surface. The cartridge strip is used up. Remove the used cartridge strip

One of the cartridges is faulty. Push the cartridge strip further and

The tool is defective or the cartridges are faulty.

The tool is badly fouled with dirt and residues.

Incorrect use of the grip.

Material with fire protection coating. Remove the fire protection coating.

Reduce fastener driving power in accordance with recommendations or, respectively, use a less powerful cartridge.

Increase fastener driving power in accordance with recommendations or, respectively, use a more powerful cartridge.

Clean the tool.

Change the piston. Contact Hilti. Clean the tool.

Press the tool fully against the working surface.

and load a new one.

use up the remaining cartridges. Contact Hilti.

Clean the tool.

above) into the cartridge transport system toward the cartridge chamber.

Clean the tool.

Use the grip correctly. See section: 7.2 Operation 34

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10. Disposal

Most of the materials from which Hilti tools or appliances are manufactured can be recycled. The materials must be correctly separated before they can be recycled. In many countries, Hilti has already made arrangements for taking back old tools and appliances for recycling. Ask Hilti customer service or your Hilti representative for further information.

For EC countries only

Disposal of electric tools together with household waste is not permissible.

In observance of European Directive 2002/96/EC on waste electrical and electronic equipment and its implementation in accordance with national law, electric tools that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility.

11. Manufacturer’s warranty - tools

Hilti warrants that the tool supplied is free of defects in material and workmanship. This warranty is valid so long as the tool is operated and handled correctly, cleaned and serviced properly and in accordance with the Hilti Operating Instructions, and the technical system is maintained. This means that only original Hilti consumables, components and spare parts, or other products of equivalent quality, may be used in the tool.

This warranty provides the free-of-charge repair or replacement of defective parts only over the entire lifespan of the tool. Parts requiring repair or replacement as a result of normal wear and tear are not covered by this warranty.

Additional claims are excluded, unless stringent national rules prohibit such exclusion. In particular, Hilti is not obligated for direct, indirect, incidental or consequential 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 merchantability or fitness for a particular purpose are specifically excluded.

For repair or replacement, send the tool or related parts immediately upon discovery of the defect to the address of the local Hilti marketing organization provided.

This constitutes Hilti’s entire obligation with regard to warranty and supersedes all prior or contemporaneous comments and oral or written agreements concerning warranties.

12. Confirmation of CIP testing

The Hilti DX 351 CT has been system and type tested. As a result, the tool bears the rectangular PTB approval mark showing approval number S 817. Hilti thus guarantees compliance with the approved type.

Unacceptable defects or deficiencies, etc. determined during use of the tool must be reported to the person responsible at the approval authority (PTB) and to the Office of the Permanent International Commission (C.I.P.).

Hilti DX351-CT User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual