HILTI DX76 Powder Actuated Tool Instruction Manual

HILTI DX76 Powder Actuated Tool

Specifications

• Model: DX 76
• Language: English
• Original Operating Instructions: 1
• Warnings: DANGER, WARNING, CAUTION

Product Information

The DX 76 product is designed for professional users only. Trained and authorized personnel are permitted to operate, service, and maintain the product. Users must familiarize themselves with all instructions, safety warnings, illustrations, specifications, components, and functions of the product before use. Failure to do so may result in electric shock, fire, and/or serious injury. Save all warnings and instructions for future reference.

FAQ

• Q: Who can operate the DX 76 product?
• A: The DX 76 product is designed for professional users only. Trained and authorized personnel are permitted to operate, service, and maintain the product.
• Q: What should I do before using the DX 76 product?
• A: Before using the DX 76 product, familiarize yourself with all operating instructions, safety warnings, illustrations, specifications, components, and functions of the product. Failure to do so may result in hazards such as electric shock, fire, and serious injury.

Original operating instructions

Information about the operating instructions
About these operating instructions

• Warning! Read and understand all accompanying documentation, including but not limited to instructions, safety warnings, illustrations, and specifications provided with this product. Familiarize yourself with all the instructions, safety warnings, illustrations, specifications, components, and functions of the product before use. Failure to do so may result in electric shock, fire, and/or serious injury. Save all warnings and instructions for future reference.
• products are designed for professional users and only trained, authorized personnel are permitted to operate, service and maintain the products. This personnel must be specifically informed about the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not under the intended use.
• The accompanying documentation corresponds to the current state of the art at the time of printing. Please always check for the latest version on the product’s page on Hilti’s website. To do this, follow the link or scan the QR code in this documentation, marked with the symbol .
• Ensure that these operating instructions are with the product when it is given to other persons.

Explanation of symbols used
Warnings
Warnings alert persons to hazards that occur when handling or using the product. The following signal words are used:

DANGER!

• Draws attention to imminent danger that will lead to serious personal injury or fatality.

WARNING!

• Draws attention to a potential threat of danger that can lead to serious injury or fatality.

CAUTION!

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

Symbols in the operating instructions
The following symbols are used in these operating instructions:

| Comply with the operating instructions
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| Instructions for use and other useful information
| Dealing with recyclable materials
| Do not dispose of electric equipment and batteries as household waste

Symbols in illustrations
The following symbols are used in illustrations:

| These numbers refer to the illustrations at the beginning of these operating instructions.
---|---
| The numbering reflects the sequence of operations shown in the illustrations and may deviate from the steps described in the text.
| Item reference numbers are used in the overview illustration and refer to the numbers used in the key in the product overview section.
---|---
| These characters are intended to specifically draw your attention to certain points when handling the product.

Product information

• products are designed for professional users and only trained, authorized personnel are permitted to operate, service and maintain the products. This personnel must be specifically informed about the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not under the intended use.
• The type designation and serial number are printed on the rating plate.
• Write down the serial number in the table below. You will be required to state the product details when contacting Hilti Service or your local Hilti organization to inquire about the product.

Product information

Safety
Safety instructions for powder-actuated direct fastening tools

WARNING
Read all safety instructions and other instructions. Failure to comply with the safety instructions and instructions can cause serious injuries.

• Keep all safety instructions and instructions for future reference.
• Do not tamper with or modify the fastening tool in any way.
• Use only fastening tools and items of equipment that are compatible with each other (base plates, fastener guides, magazines, pistons and accessories) and consumables (fasteners and cartridges).
• Check the fastening tool and accessories for damage.
• Moving parts must be in full working order; make sure that they cannot jam. Comply with the instructions on cleaning and oiling in these operating instructions.
• All parts must be correctly installed to ensure faultless operation of the fastening tool. Damaged parts must be properly repaired or replaced by Hilti Service unless otherwise stated in the operating instructions.
• Use only Hilti DX cartridges or other suitable cartridges that meet the minimum safety requirements.
• Use the fastening tool only for the applications defined in the section headed “Intended use.
• Do not attempt to drive fasteners into unsuitable base materials, for example, material that is too thin, too hard, or too brittle. Driving a fastener into these materials can cause the fastener to break, splinter the material or be driven right through. Examples of unsuitable materials are:
• Weld seams in steel, cast iron, glass, marble, plastic, bronze, brass, copper, insulating material, hollow brick, ceramic brick, thin sheet metal (< 4 mm) and cellular concrete.
• Comply with the Hilti ‘Direct Fastening Technology Manual’ or the corresponding local Hilti ‘Technical Guide to Fastening Technology’. Always also comply with the operating instructions of the fastener to be used.
• If a fastener is driven and accidentally misses the beam, replace the X-ENP nail strip with a new X-ENP nail strip.

Pre-use requirements

• Only appropriately trained persons who have been duly authorized and informed of the possible hazards are allowed to operate or service this fastening tool.
• Wear your protective equipment while the tool is in use.
• Wear suitable eye protection and a hard hat.
• Wear protective gloves. The fastening tool can get hot in use.
• Wear ear protectors. The ignition of a propellant charge can damage the hearing.
• Wear non-skid shoes.

Safety at the workplace

• Keep the workplace tidy. Objects which could cause injury should be removed from the working area. Disorder in the working zone can lead to accidents.
• Make sure that the working area is well-lit and, when working in an enclosed space, make sure it is adequately ventilated.

Personal safety

• Never press the nosepiece of the fastening tool against your hand or any other part of the body! Never point the fastening tool toward other persons!
• Do not compress the fastening tool with your hand on the magazine or fastener guide, piston or piston guide or a loaded fastener. Compressing the fastening tool by hand can make the fastening tool ready to fire, even without a fastener guide installed. This gives rise to a risk of serious injury for yourself and others.
• Everyone in the vicinity must wear ear protection, eye protection and a hard hat.
• Stay alert, watch what you are doing and use common sense when operating a direct fastening tool. Do not use the fastening tool when you are tired or under the influence of drugs, alcohol or medication. Stop working if you experience pain or feel unwell. A moment of inattention while operating the fastening tool can result in serious injury.
• Avoid working in awkward body positions. Make sure you work from a safe stance and stay in balance at all times.
• Keep the arms slightly bent while operating the fastening tool, do not straighten the arms.
• Keep other people away from the working area, especially children.

Use and care of direct fastening tools

• Use the fastening tool only for its intended use and only when it is in faultless condition. Do not attempt to use the tool for purposes for which it is not intended.
• Do not use the fastening tool in places where there is a risk of fire and explosion.
• Before driving fasteners, check behind the object to make sure that no-one is present in line with the fasteners to be driven. Danger of fasteners penetrating right through!
• Make sure that the nosepiece of the fastening tool is never pointed toward yourself or other persons.
• Hold the fastening tool only by the gripping surfaces provided for the purpose.
• Keep the gripping surfaces dry, clean and free from oil and grease.
• Pull the trigger only when the fastening tool is at right angles to and pressed fully against the work surface.
• Before starting work, check the selected energy setting.
• Carry out a test by driving fasteners into the base material you are working on → page 7.
• When driving fasteners, always hold the fastening tool at right angles to the work surface. This reduces the risk of a fastener being deflected by the base material.
• Do not drive fasteners into existing holes unless this is recommended by Hilti (e.g. DX-Kwik).
• If a fastener is driven and accidentally misses the beam, replace the X-ENP nail strip with a new X-ENP nail strip
• Do not re-use a fastener that was used beforehand – risk of injury! Use a new fastener.
• Do not attempt to re-drive a fastener that was not driven in deeply enough! The fastener could break.
• Never leave a loaded fastening tool unattended.
• Always unload the fastening tool (remove cartridges and fasteners) before cleaning, maintenance and care, changing the fastener guide, before work breaks and before storing the tool.
• Transport and store the fastening tool in the Hilti case intended for the purpose.
• Store fastening tools that are not in use in a dry, secure place where they are inaccessible to children.
• Always position the nosepiece of the fastening tool on smooth, flat surfaces free of obstructions and fully supported by the sub-structure.
• Comply with the specifications for distances from edges and spacing between fasteners (see the section headed “Minimum distances.

Thermal safety rules

• Do not exceed the maximum fastener driving rate recommended in the section headed “Technical data”.
• If the fastening tool overheats or if the cartridge strip deforms or melts, remove the cartridge strip and allow the fastening tool to cool down.
• Do not dismantle the fastening tool while it is hot. Allow the fastening tool to cool down.

Risk of explosion with cartridges

• Use only cartridges that are suitable and approved for use with the fastening tool.
• Remove the cartridge strip when you are going to take a break and when you have finished the job, and before you transport the fastening tool.
• Do not use force to remove fasteners and/or cartridges from the magazine strip or the fastening tool.
• Store unused cartridges in accordance with the storage specifications for cartridges for powder-actuated fastening tools (e.g. dry, temperature between 5 °C and 25 °C) in a secured storage facility.
• Do not leave unused or partly used cartridge strips lying around. Collect the used cartridge strips and store the cartridge strips at a suitable, secured location.
• Follow all instructions relating to safety, handling and storage in the safety data sheet of the cartridges.

Description

1. Fastener magazine MX 76
2. Contact pin
3. Mounting points for splinter guard
4. Cycling grip
5. Cartridge barrel (insertion)
6. Loading status control window
7. Adjusting knob for driving energy
8. Indicator for energy control
9. Padded end cap
10. Housing
11. Grip pad
12. Trigger
13. Piston-guide locking lever
14. Piston guide
15. Splinter guard
16. Fastener stop piece
17. Air vents
18. Fastener guide X-76-F-15
19. Splinter guard for X-76-F-15
20. Piston
21. Piston stopper

Intended use
The product described is a fastening tool for driving nails, studs and fasteners into steel.
Use the product only in combination with the equipment designed for use with the fastening tool. Fastener guides, pistons and fasteners must be compatible with one another.
Use the product only with spare parts and accessories from Hilti and with cartridges and fasteners from Hilti, or other suitable cartridges and fasteners.

Requirements to be met by cartridges
WARNING

• Risk of injury by unexpected explosion! Use of cartridges that do not meet the minimum safety requirements can lead to a build-up of unburned powder. An explosion and severe injuries to the operator and bystanders can result.
• Use only cartridges that meet the minimum safety requirements of your local statutory regulations!
• Adhere to the maintenance intervals as stated and have the fastening tool cleaned regularly by Hilti- Service!
• Use only the Hilti DX cartridges listed in this table, or other suitable cartridges that are compliant with the minimum safety requirements:
• It is a requirement for EFTA countries that the cartridges must be CE-compliant and must bear the CE mark of compliance.
• It is a requirement for the United Kingdom that the cartridges must be UKCA-compliant and must bear the UKCA mark of compliance.
• It is a requirement for the USA that the cartridges must be compliant with the stipulations set out in ANSI A10.3-2020.
• It is a requirement for the non-European member states of the C.I.P. that the cartridges must have C.I.P. approval for the DX fastening tool used.
• It is a requirement for the remaining countries that the cartridges must have passed the firing-residues test under EN 16264 and must have a manufacturer’s declaration to this effect.

Cartridges (as example: X-ENP)

Comply with the instructions for use in the operating instructions of the fastener used, in the Hilti Direct Fastening Technology Manual or the corresponding local Hilti ‘Technical Guide to Fastening Technology’.

Minimum distances and edge distances

• You must always observe certain minimum distances and spacing when driving fasteners. They can differ, depending on the product.
• Comply with the instructions for use in the operating instructions of the fastener used, in the Hilti Direct Fastening Technology Manual or the corresponding local Hilti ‘Technical Guide to Fastening Technology’.

Information about the field of applications
For detailed information about areas of application, request a copy of the Hilti ‘Direct Fastening Technology Manual’ or the corresponding local Hilti ‘Technical Guide to Fastening Technology’ from your Hilti Store.

Technical data

Product properties

(17.72 in × 3.98 in × 13.86 in)

Magazine capacity| 10 fasteners
Recommended maximum fastening rate| 600 fastener driving opera- tions/h
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Max. contact pressure| ≤ 240 N
Compression stroke| 32 mm
Ambient temperature (storage and use)| −15 ℃ … 50 ℃

Noise and vibration information
The noise values listed were determined under the following conditions:
Noise information under EN 15895

Vibration information under EN 2006/42/EG

Preparations at the workplace
Assembling the fastening tool

WARNING
Risk of injury by accidental triggering! A loaded fastening tool can be made ready to fire at any time.
Accidental triggering can endanger you and others.

• Always unload the fastening tool (cartridges and fasteners) whenever you interrupt work with the fastening tool.
• Before all maintenance, cleaning and setup activities, always make sure that there are no cartridges and no fasteners in the fastening tool.

1. Mount the piston stopper on the fastener guide (1).
2. Insert the piston into the piston guide (2).
3. Insert the piston guide (slider at top) into the housing.
4. Push the piston guide into the housing and lock the piston guide with the piston-guide locking lever (4).
5. Position the fastener guide on the piston guide.
6. Turn the fastener guide clockwise until it engages (5).

The fastener guide is locked.

Operation

WARNING
Risk of injury by accidental triggering! A loaded fastening tool can be made ready to fire at any time.
Accidental triggering can endanger you and others.

• Always unload the fastening tool (cartridges and fasteners) whenever you interrupt work with the fastening tool.
• Before all maintenance, cleaning and setup activities, always make sure that there are no cartridges and no fasteners in the fastening tool.

WARNING

• Hazard due to hot surfaces! The fastening tool can become hot in use.
• Wear protective gloves.

CAUTION

• Risk of injury! If a fastener is driven and misses the beam, the fasteners in the magazine might be shifted or slightly tilted. Consequently, there is a risk of injuries or of damage to the fastening tool.
• If a fastener is driven and accidentally misses the beam, replace the X-ENP nail strip with a new X-ENP nail strip.

If resistance is unusually high when you insert the cartridge strip, check whether the cartridge strip is compatible with this fastening tool.
Observe the safety instructions and warnings in these operating instructions and on the product.
Safety-related instructions for use

body!

Pressing the fastener guide or the exposed piston against a part of the body (a hand, for example) can make the fastening tool ready to fire. As a result, there would be a risk of injury.

| Do not pull back the magazine or other fastener guides by hand!

Pulling the magazine back by hand can make the fastening tool ready to fire. As a result, there would be a risk of injury.

Loading fastening tool (single-fastener tool)

1. Push the fastener into the fastener guide from the front until the washer of the fastener is held in place in the fastener guide (1).
2. Push a cartridge strip, narrow end first, into the cartridge barrel (2).
   • The cartridge strip is fully recessed in the cartridge barrel.
3. Cycle the fastening tool with the cycling grip.
   • The fastening tool is loaded and ready for use.

Loading fastening tool (magazine)

1. Insert the strip of ten fasteners into the magazine (1).
2. Push a cartridge strip, narrow end first, into the cartridge barrel (2).
   • The cartridge strip is fully recessed in the cartridge barrel.
3. Cycle the fastening tool with the cycling grip (3).
   • The fastening tool is loaded and ready for use.

Setting driving energy

• Select the energy setting that suits the application. If no empirical values are available, always start with the minimum driving energy. Increase driving energy step by step until the fastener is driven correctly.
• For detailed information, request a copy of the Hilti ‘Direct Fastening Technology Manual’ or the corresponding local Hilti ‘Technical Guide to Fastening Technology’ from your Hilti Store.

1. To increase power, turn the adjusting knob for driving energy in the + direction.
   Energy levels:

   • 1 = lowest energy
   • 4 = highest energy

2. To reduce power, turn the adjusting knob for driving energy in the − direction.

3. Check whether the fastener was correctly driven under the operating instructions of the fastener.

Driving fasteners

1. Hold the fastening tool perpendicular to the base material and press the fastening tool against the surface until it is fully compressed (1).
2. Press the trigger to drive the fastener (2).
3. Cycle the fastening tool with the cycling grip (3).

Driving X-HVB fasteners for composite beams

The X-76-F-HVB fastener guide is needed for installing shear connectors for composite beam constructions.

1. Set the lever of the X-76-F-HVB fastener guide to position 1.
2. Insert a fastener.
3. Position a shear connector on the fastener guide (1).
4. Position the fastening tool.
5. Hold the fastening tool perpendicular to the base material and press the fastening tool against the surface until it is fully compressed (1).
6. Press the trigger to drive the fastener (3).
7. Cycle the fastening tool with the cycling grip (4).

• Repeat the steps to secure another shear connector.

If you want to drive a second fastener in the same shear connector, set the lever of the X-76-FHVB fastener guide to position 2 and repeat the steps.

Unloading fastening tool

1. Cycle the fastening tool until the cartridge strip is visible at the discharge aperture.
2. Pull the cartridge strip out of the fastening tool.
3. Hold nail strip (1) and push the stopper to the rear (2).
4. Pull the nail strip out of the magazine (3).

Troubleshooting

WARNING

• Risk of explosion! Cartridges may fire (explode) if handled improperly.
• Do not use force to remove cartridges from the fastening tool or the magazine strip.

WARNING

• Hazard due to hot surfaces! The fastening tool can become hot in use.
• Wear protective gloves.

The fastening tool jams and does not extend

DANGER
Risk of injury by unsecured fastening tool! If the fastening tool jams in the compressed state or if a cartridge does not fire, the fastening tool might be loaded with the safety off. Unintentional triggering can cause severe injuries.

• At all times, make sure that the fastening tool is not pointing toward you or anyone else.
• Take your finger off the trigger and do not hold your hand in front of the muzzle of the fastener guide.
• Keep a fastening tool with the safety off under observation at all times.

1. Keep the fastening tool pressed against the work surface for at least 10 seconds and trigger the fastening tool again.
2. Lift the fastening tool away from the working surface.
   • Be sure not to point it toward yourself or other persons!
3. Try to pull the fastener guide to its initial position by hand.
   • Take your hand off the trigger and do not hold your hand in front of the muzzle!
4. Immediately pull the cartridge strip out of the fastening tool.
   • If the cartridge strip cannot be removed:
   • Allow the fastening tool to cool down at a safe location under observation.
   • At all times, make sure that the fastening tool is not pointing toward you or anyone else.
   • Contact Hilti Service.
5. Service the tool.

Cartridge does not fire when fastening tool is above operating temperature
At all times, make sure that the fastening tool is not pointing toward you or anyone else!

1. Keep the fastening tool pressed against the work surface for at least 10 seconds and trigger the fastening tool again.
2. If the cartridge still does not fire, wait for 10 seconds and then lift the fastening tool away from the work surface.
3. Immediately pull the cartridge strip out of the fastening tool.
   • If the cartridge strip cannot be removed:
   • Allow the fastening tool to cool down at a safe location under observation.
   • Contact Hilti Service.
4. Service the tool. → page 10
5. Move the cartridge to a safe location.
6. Dispose of the cartridges that have not fired.
   • Comply with the locally applicable disposal regulations.
7. Allow the fastening tool to cool down and resume work with a new cartridge strip.

The cartridge does not fire when the fastening tool is at operating temperature

1. Stop using the tool immediately.
2. Unload the fastening tool (cartridges and fasteners) and dismantle the fastening tool. → page 10
3. Check that you are using the correct combination of fastener guides, piston, fasteners and cartridge.
4. Check the buffer, piston and fastener guides for wear; replace the components as necessary.
5. Clean and oil the fastening tool.
   • If the problem persists after the measures described above have been taken, further use of the fastening tool is not permissible.
   • Have the fastening tool checked and, if necessary, repaired by Hilti Service.
   • Dirt and residues build up in the tool under normal operating conditions and functional parts are also subject to wear.
   • Service the tool at regular intervals. Check the piston and buffer daily if the fastening tool is used intensively, or at the latest after every 2500 to 3000 fasteners. The interval corresponds to the regular cleaning cycle of the fastening tool. The service and cleaning cycles are based on typical tool use.

Care and maintenance

Care of the fastening tool
For cleaning, use only the cleaning accessories supplied by Hilti, or material of equivalent quality. Do not, under any circumstances, use spray cleaning equipment, compressed air, high-pressure cleaning equipment, solvents or water for cleaning.

CAUTION

• Risk of damage to the fastening tool! Foreign bodies can jam in the fastening tool and damage the fastening tool when a cartridge is fired.
• Prevent foreign bodies from penetrating into the interior of the fastening tool.
• Clean the exterior of the fastening tool with a slightly damp cloth at regular intervals.

Maintenance
WARNING

• Dangerous substances! The deposits inside DX tools contain substances that may present a health hazard.
• Do not inhale dust or dirt while cleaning.
• Keep dust and dirt away from foodstuffs.
• Wash your hands after cleaning the fastening tool.
• Clean the fastening tool and use Hilti spray as stated in the operating instructions. This will help prevent malfunctions.

1. Regularly check all external parts of the fastening tool for damage.
2. Regularly check all operating controls to ensure that they work properly.
3. Use the fastening tool only with suitable cartridges and the recommended energy
   • Use of the wrong cartridges or excessively high power settings can lead to premature failure of the fastening tool.

Servicing the tool
Service the tool in the following situations:

1. If energy fluctuations occur (evidenced by irregularities in fastener penetration depth).
2. If cartridge misfires occur (the cartridge is not fired).
3. If the tool becomes noticeably less easy to operate.

• If the required contact pressure increases noticeably.
• If the trigger resistance increases.
• If the adjusting knob for driving energy has become difficult to turn.
• If the cartridge strip is difficult to remove.

Disassembling the fastening tool

WARNING
Risk of injury by accidental triggering! A loaded fastening tool can be made ready to fire at any time.

• Accidental triggering can endanger you and others.
• Always unload the fastening tool (cartridges and fasteners) whenever you interrupt work with the fastening tool.
• Before all maintenance, cleaning and setup activities, always make sure that there are no cartridges and no fasteners in the fastening tool.

1. Make sure that the cycling grip is in its starting position (1).
   • The marks on cycling grip and housing are in alignment.
2. Unscrew the fastener guide (3).
3. Remove the fastener guide with the piston from the piston guide.
4. Pull the piston out of the fastener guide (4).
5. Push the piston guide into the housing and unlock the piston guide with locking lever (2).
6. Pull the piston guide out of the housing.

Checking piston and stopper
WARNING
Risk of injury! A faulty buffer or piston or a faulty base plate leads to an increased risk of malfunctions.

• Check the piston and buffer for wear and replace them if damaged.
• Do not tamper with or modify the piston.
• Do not attempt to repair a faulty piston yourself, for example by grinding the tip.

1. The piston must be replaced in the following cases:
   • The piston is broken.
   • The piston is badly worn or chipped (e.g. a segment of the circumferential ring-shaped elevation at the piston tip broken away).
   • The piston rings are cracked or missing.
   • The piston is bent (check by rolling the piston on a smooth, flat surface).
2. The stopper must be replaced in the following cases:
   • The metal ring of the stopper is broken or detached.
   • The stopper no longer holds on the fastener guide.
   • The rubber is badly worn at certain points under the metal ring.

Observe the wear criteria applicable to important tool components, as listed in the “Care and maintenance” section.

Criteria for replacement of wear parts
Piston and piston stopper wear criteria

Worn

Always replace the pis-

| | Signs of chipping at the tip / face of the piston.
ton and piston stopper|
together.|
| | The piston has made a deep im-
| pression (3 mm or more) in the
| piston stopper.

Nosepiece wear criteria

Worn

Have it replaced by

Hilti Service

| | Obvious signs of chipping.

Cleaning and oiling fastening tool

Use only Hilti spray. The use of other lubricants can cause malfunctions or damage the fastening tool.
Apply the Hilti spray only as a thin film. It is not permissible for beads to form. For example, after applying the Hilti spray, rub the oiled surface down lightly with the cloth supplied with the spray.
Make sure that no oil makes its way into the cartridge chamber!

1. Unload the fastening tool (cartridges and fasteners) and dismantle the fastening tool. → page 10
2. Use the brushes supplied to clean the piston and piston guide (outside (1) and inside (2)).
3. Use the small round brush to clean the cartridge chamber (3) and the adjacent holes for the power regulation pin (3).
4. Clean the seat of the piston guide in the fastening tool (4).
5. Oil the piston guide (outside) and wipe off the piston lightly with a cloth (5).
   • Make sure that no oil makes its way into the cartridge chamber!
6. Oil the slide rails of cycling grip (6).

Final check of the fastening tool
After carrying out care and maintenance, check that all protective and safety devices are fitted and that they function faultlessly.

Troubleshooting

WARNING!
Before you start troubleshooting, make sure there are no cartridges in the fastening tool. If the cartridges cannot be removed, contact Hilti Service

If the trouble you are experiencing is not listed in this table or you are unable to rectify the problem by yourself, please contact Hilti Service.

strip and insert a new strip.
Fastening tool is damaged| ▶  Contact Hilti Service.
The cartridge strip cannot be removed| The fastener driving rate is too high| ▶| Allow the fastening tool to cool and then carefully try to remove the cartridge strip. If the cartridge sleeve remains jammed, contact Hilti Service. Do not attempt to forcibly remove cartridges from the magazine strip.
Cartridge does not fire| Fastening tool not fully pressed against the work surface| ▶| Press the fastening tool fully against the work surface again and then pull the trigger.
The cartridge strip is used up| ▶| Unload the cartridge strip and load a new strip.
The magazine or fastener guide is not screwed on far enough.| ▶ Screw the magazine tighter.
Individual cartridge is faulty| ▶| Cycle the tool and use up the remaining cartridges.
The fastening tool is defective or the cartridge is faulty| ▶  Contact Hilti Service.
The fastening tool was not cycled| ▶| Rack the cycling grip through one full cycle.

Insufficient nail stand-off

| Driving energy too high| ▶| Reduce the driving energy

Wrong piston used| ▶| Use the correct equipment configuration with compatible piston and fastener.
The piston is worn| ▶| Change the piston and the piston stopper.
Malfunction| Possible cause| Action to be taken
---|---|---

Insufficient driving depth

| Space between metal sheet and profile.| ▶ Avoid gaps between sheet metal and profile.
Driving energy too low| ▶ Increase the driving energy or use higher-energy cartridges.

Metal sheet is deformed

| Beam missing as sub-structure| ▶ Mark the beam at the correct position before positioning

the power tool for driving the fastener.

Excessive nail stand-off

| Fastener driven into rib of beam| ▶ Drive a second fastener beside the first one.
Supporting material thickness changed| ▶ Select a cartridge.
▶ Increase driving energy in accordance with cartridge recommendations or use a

more powerful cartridge.

Insufficient driving energy| ▶ Select a cartridge.
▶ Increase driving energy in accordance with cartridge recommendations or use a

more powerful cartridge.

Excessive build-up of foreign mat- ter on the fastening tool| ▶ Clean the fastening tool. Check the straightness of the piston.
The piston is worn| ▶ Change the piston and the piston stopper.
Fastening tool is damaged| ▶  Contact Hilti Service.
Wrong piston used| ▶ Use the correct equipment configuration with compatible piston and fastener.
Nail stand-off varies consid- erably| The fastening tool was rammed hard against the working surface| ▶ Avoid ramming the fastening tool against the work surface.
Irregular, partly incomplete cycling| ▶ Cycle the tool completely.
Irregular driving energy| ▶ Service the tool.

▶  Contact Hilti service.

Shear breakages of fasteners during fastener driving| The face of the piston is worn or chipped.| ▶ Replace the piston and the piston stopper.
Fastener driven into rib of beam| ▶ Drive a second fastener beside the first one.
Supporting material is too thick, or the thickness has changed| ▶ Check the fastener recommen- dation. If the type of fastener is

correct, increase driving energy in accordance with cartridge recommendations or use a more powerful cartridge.

Fastening tool does not ex- tend| Piston jams in piston brake| ▶ Remove the nail magazine or the fastener guide.
▶ Change the piston and the piston stopper.
▶ Install the nail magazine or the fastener guide.
Excessive build-up of foreign mat- ter on the fastening tool| ▶ Service the tool.
Malfunction| Possible cause| Action to be taken
---|---|---
Fastening tool does not ex- tend| Cartridge strip jams, fastening tool is overheated| ▶ See the “Cartridge strip cannot be removed” fault. Adhere to

the maximum fastener driving rate.

Firing not possible| Fastening tool was not cycled cor- rectly, the cycling grip is not in the starting position| ▶ Cycle the fastening tool com- pletely and set the cycling grip to the starting position.
Trigger pulled before the tool is fully pressed down| ▶ Press the fastening tool fully against the work surface and then pull the trigger.
Fastener transport malfunctions| ▶ Remove the fastener strip.

▶ Check the fastener strip for damage.

▶ Replace damaged fastener strips.

Fastening tool is damaged| ▶  Contact Hilti Service.
The magazine or fastener guide is not screwed on far enough.| ▶ Screw the magazine tighter.
No fastener driven| Fastening tool was not cycled cor- rectly, the cycling grip is not in the starting position| ▶ Cycle the fastening tool com- pletely and set the cycling grip to the starting position.
No fastener inserted in the tool| ▶ Insert a fastener into the fastening tool.
Magazine nail transport mecha- nism is faulty| ▶  Contact Hilti Service.
No piston inserted in the tool| ▶ Insert the piston into the fastening tool.
The piston is broken| ▶ Change the piston and the piston brake.
Piston does not return| ▶  Contact Hilti Service.
Fastener guide is dirty| ▶ Service the tool.
Fasteners jammed in the fastener guide| ▶ Remove jammed fasteners. Remove plastic residues from the tool magazine. Avoid shear

breakages and misfires.

The fastener guide can’t be screwed on to the tool fully.| Fastener guide is dirty| ▶ Service the tool.
Piston stopper is installed the wrong way round.| ▶ Unscrew the fastener guide. Install the piston stopper right way round and screw the piston

guide back on.

The piston can’t be fitted.| Fastening tool, especially the pis- ton guide, is dirty| ▶ Service the tool.
Pins are visible in the piston guide| ▶ Pull the cycling lever back until the pins can engage.

Disposal

• Most of the materials from which Hilti tools and appliances are manufactured can be recycled. The materials must be correctly separated before they can be recycled. In many countries, your old tools, machines or appliances can be returned to Hilti for recycling. Ask Hilti Service or your Hilti representative for further information.

Manufacturer’s warranty

• Please contact your local Hilti representative if you have questions about the warranty conditions.

C.I.P. test confirmation
The following applies to C.I.P. member states outside the EU and EFTA judicial areas: The Hilti DX 76 has been system and type tested. As a result, the tool bears the rectangular PTB approval mark showing approval number S 813. Hilti thus guarantees compliance with the approved type.

Further information

• For more information on operation, technology, environment and recycling, follow this link:  qr.hilti.com/manual/?id=282472.
• This link is also to be found at the end of the documentation, in the form of a QR code.

CONTACT

• Hilti Corporation
• LI-9494 Schaan
• Tel.: +423 234 21 11
• Fax:+423 234 29 65
• www.hilti.group.

References

• HILTI Country selector

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