Hilti DX 76-MX User manual

DX 76-MX
DX 76-PTR
Quick Start Guide – Supplement

2
INDEX
Additional resources available are:
Tool Operating Instructions
How to video (use the resources in Hilti online or Hilti channel in YouTube)
SAFETY FIRST 3
TOOL ANATOMY DX 76-MX
DX 76-PTR
4
5
SELECTING THE RIGHT NAIL,
TOOL & CARTRIDGE
6
FASTENING METAL DECK
TO THE STEEL STRUCTURE
INSTALLING THE DECKING NAIL 7–8
KNOWING HOW TO CLEAN
THE TOOL
9 – 10
KNOWING ESSENTIAL FIELD
TROUBLE SHOOTING
POSSIBLE CAUSES CARTRIDGES
POSSIBLE CAUSES NAILS
11
12

3
INDEX
SAFTEY FIRST
Requirements to be met by the user
The tool is intended for professional use. The tool may be operated, serviced and maintained only by trained, authorized personnel
who have received special instruction regarding the hazards that may be encountered.
Use the tool for the rst time only after you have been trained by a Hilti specialist on how to use it safely.

Personal safety
Never tamper with or modify the tool in any way.
Do not use the tool for purposes for which it was not intended.
Stay alert, watch what you are doing and use common sense when operating the tool.
Do not use the tool if you are not concentrating.
To reduce the risk of injury use only genuine Hilti accessories and spare parts or those of equivalent quality.
Use only fasteners of a type approved for use with the tool.
Observe the information printed in the operating instructions concerning operation, care and maintenance.
Never point the tool toward yourself or other persons.
Never press the nosepiece of the tool against your hand or against any other part of your body (or other persons hand or part of
their body).
Drive the fasteners only into structural steel members. Do not attempt to drive fasteners into other materials or into hardened or
brittle steel, cast iron or spring steel.
Pull the trigger only when the nosepiece of the tool is in contact with the working surface and the tool is fully compressed.
When driving fasteners, always hold the fastening tool at right angles to the working surface in order to help prevent the fastener
being deected by the surface.
Never redrive a fastener, as this may cause the fastener to brake.
Keep the grips dry, clean and free from oil and grease.
Never leave a loaded tool unattended.
Always remove the cartridges before cleaning, servicing or carrying out maintenance work on the tool.
Never leave the tool unattended.
When not in use, the tool should be unloaded (cartridge strips removed) and stored in a locked, dry place where it is inaccessible
to children.
Never compress the tool while operating the Pawl, as this presents a risk of injury to the operators hand.
Remove the cartridge strip from the tool carefully. Never attempt to pry a cartridge from the magazine strip or tool.
Do not disassemble the tool while it is hot. If this is unavoidable, wear protective gloves.
Store unused cartridges in a dry place, where they are locked away or high up and out of reach of children.
Do not operate the tool when parts are damaged or when the controls do not function correctly,
have the tool repaired by Hilti Tool Service.

Personal Protective Equipment (PPE)
Operator and bystanders must wear helmet, eye and ear protection. Hilti recommends the operator wear hand gloves. In addition, all
the jobsite safety requirements (steel toe safety shoes, safety harness, high visibility vest, etc.), deemed necessary by the local regula-
tions and jobsite requirements must be adhered to.

Information here is general: read the operating instructions for complete details

TOOL ANATOMY 4
INDEX
Fastener
Stop
Spall
Guard
Contact
Pin
Cycling
Grip
Cartridge Strip
Guideway
Power
Regulation
Wheel
Power
Regulation
Indicator
Grip PadTriggerSliding
Sleeve
Nail Magazine
Piston Guide
Release Lever
Padded
End Cap
Piston Stopper
Piston
DX 76-MX
Piston Fastener
X-76-P-ENP assembly X-ENP-19

TOOL ANATOMY 5
INDEX
Fastener
Stop
Spall
Guard
Contact
Pin
Cycling
Grip
Cartridge Strip
Guideway
Power
Regulation
Wheel
Power
Regulation
Indicator
Grip PadTriggerSliding
Sleeve
Nail Magazine
Piston Guide
Release Lever
Padded
End Cap
Piston Brake
Piston
DX 76-PTR
Piston Fastener
X-76-P-ENP-PTR assembly X-ENP-19
X-76-P-ENP2K-PTR assembly X-ENP2K-20

SELECTING THE RIGHT NAIL, TOOL & CARTRIDGE 6
INDEX
Selecting the right nail, tool and cartridge is a pre-requisite for good quality fastening.
In addition, improper selection can lead to excessive wear on the DX 76 deck fastening tool.
Select the right nail
X-ENP2K-20 L15 MX fastener
is used for fastening deck
into steel structures and light
gauge steel in the thickness
range 5/32" (4 mm) to 15/64"
(6 mm).
;(13.
Select the right tool &
piston
DX 76-PTR tool can be
used when punching though
the deck is a concern, use
X-76-P-ENP2K-PTR piston.
';375
Select the right tool &
piston
DX 76-MX tool is used
for most applications and
markets.
DX 76-PTR tool can be used
when punching though the
deck is a concern.
';0;375
Select the right nail
X-ENP-19 L15 MX fastener
is used for fastening deck to
structural steel 1/4”(6.4 mm)
to full steel.
;(13
Select the right cartridge
For the X-ENP-19 L15 MX nail you need to use the 6.8/18 M10
cartridge.
;(13
Select the right cartridge
For the X-ENP2K-20 nail you need to use the 6.8/18 M10
cartridge.
;(13.
See below reference chart to select the right color cartridge based on steel strength and steel thickness by nail type. The num-
ber within the box provides a quick reference for the tool power level. However, due to variability in base steel, check the nail
stand-off by performing test fastenings and adjust the power level accordingly.
Standard
steel
350-530 N/mm2
High-strength
steel
Base material thickness
(inch/mm)
530-630 N/mm2
X/X"
(4.5 mm)
X/X"
(3.5 mm)
X/X"
(3.0 mm)
X/X"
(6.0 mm)
red
2
3
4
4
blue red
green
4
4
4
blue
green
4
3
4
3
red black
4
3
4
3
red
blue
Standard
steel
S235, S275
E 36, ST 37,
340-470 N/mm
2
High-strength
steel
S355, S275
E 42, ST 52,
490-630 N/mm
2
>3/4"
(19.0 mm)
5/8"
(16.0 mm)
1/4"
(6.4 mm)
5/16"
(8.0 mm)
3/8"
(9.6 mm)
Base material thickness
(inch/mm)

FASTENING METAL DECK TO THE STEEL STRUCTURE 7
INDEX
Load the nail
It is a good practice to
always keep the Nail
Magazine full. This redu-
ces damage to the Piston
Brake/Stop and subsequent
damage to the Nail Detec-
tion Mechanism
Tip: For DX 76-MX/PTR
load 1 nail strip rst and
then always load nails when
cartridge strip runs out.

Align tool with the
deck marking
Align the tool with the
marking prior to fastening.
Piston jam is a reported
problem by our customers.
In most cases is due to
missing the joist or beam
and gaps between the
sheets or structural beams
while making the fastening.
Missing the joist and beam
at the time of fastening can
reduce the lifetime of the
Piston and Piston Brake/
Stop. Hence, it is important
to mark the deck and align
the tool with the mark while
fastening.

Compress the tool and
pull the trigger

Load the cartridge

Check cartridge strip
is ush
This step prevents missing
the rst cartridge on the
strip.

INSTALLING THE DECKING NAIL
Mark the deck
Marking the deck is import-
ant to fasten on the joist
or beam because you cant
see the joist or beam when
fastening the deck.


FASTENING METAL DECK TO THE STEEL STRUCTURE 8
INDEX
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Check nail stand-off
and adjust power level
if required
Initially, then periodically
while fastening, and any
time you change base mate-
rial, use the Power Adjust-
ment Gauge to check the
nail stand-off and adjust the
tool power level.
;(13.
Check nail stand-off
and adjust power level
if required
Initially, then periodically
while fastening, and any
time you change base mate-
rial, use the Power Adjust-
ment Gauge to check the
nail stand-off and adjust the
tool power level.

;(13
 ;(13.
 ;(13
 ;(13.
 ;(13
;(13.
;(13
;(13.
;(13
INSTALLING THE DECKING NAIL

KNOWING HOW TO CLEAN THE TOOL 9
INDEX
Disassamble the tool

Check the Piston and
Piston Stopper
';0;

Remove the cartridge strip and nails before disassembling the tool.
Change if either the Piston or Piston Stopper is worn.
Change only as a set both Piston and Piston Stopper.
a
a
ac
b
b
b
b
a

 
 
 
a
b
Clean the tool

While cleaning the tool, the Hilti spray should be applied
ONLY on the Nail Magazine and NOT inside the tool.






a
b
a ab b

KNOWING HOW TO CLEAN THE TOOL 10
INDEX




Assemble the tool

Check the Piston Brake/Stop and Piston is always assembled back in.
b
a
a
b
Check the Piston and
Piston Brake
';375

Change if either the Piston or Piston Brake is worn.
Change only as a set both Piston and Piston Brake.



a
b
a ab b

KNOWING ESSENTIAL FIELD TROUBLE SHOOTING 11
INDEX
POSSIBLE CAUSES CARTRIDGES
Problem Possible causes Recommended action
Cartridges are not
transported
The cartridge strip is damaged Change the cartridge strip
The tool is damaged Send DX 76 Tool to Hilti Tool Service Center
Cartridge Strip can’t
be removed
The tool is damaged or has over-
heated as a result of an excessively
high fastener driving rate
Allow tool to cool, then carefully try to remove the
cartridge strip. Remove the piston guide from the
tool, if cartridge sleeve remains jammed in the
chamber, use the round rod from the cleaning set to
remove it – if not possible, contact Hilti
Cartridge doesn’t re
If a cartridge fails to re or misres, always
proceed as follows:
Keep the nose of the tool pressed at right
angles against the working surface for 30
seconds. If the cartridge still fails to re, lift
the tool away from the working surface, taking
care to avoid pointing it at yourself or other
persons. 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 suitably in order to prevent further use or
misuse of any unred cartridges.
The tool is not fully pressed against
the working surface
Press the tool fully against the working surface and
pull the trigger
The cartridge strip is used up Remove the used cartridge strip, load a new strip
The magazine or fastener guide is
not screwed on far enough Screw the magazine farther onto the tool
One of the cartridges is faulty Cycle the tool and use up the remaining cartridges
The tool is defective or the
cartridges are faulty Contact Hilti
The tool is not cycled Cycle the tool – section cleaning the piston guide
The tool remains
compressed (doesn’t
extend when pressure
is released)
The piston sticks in the piston
stopper/ brake Change the piston and piston stopper/brake
The tool is dirty Clean the piston guide, check the straightness of the
piston
The cartridge strip has jammed,
the tool has overheated
Please refer to the fault: “cartridge strip can’t be re-
moved”. Do not exceed the maximum recommended
fastener driving rate
The tool can’t be red
The tool wasn’t cycled correctly,
the cycling grip is not in the starting
position
Cycle the tool fully against the working surface and
then pull the trigger
The trigger is pulled before the tool
is pressed fully against the working
surface
Press the tool fully against the working surface and
then pull the trigger
Fastener transport malfunctions Loading fastener strips in the magazine and remo-
ving fastener strips from the tool – See page 9
The magazine or fastener guide is
not screwed on far enough Screw the magazine farther onto the tool
The tool is damaged Contact Hilti
The tool is badly fouled with dirt and
residues
Clean the piston guide, check the straightness of the
piston
Stiff cycling action The tool needs to be cleaned See page 9
There are few instances the tool ceases to function on the jobsite. We identify below problems the customer may encounter,
their possible causes and the recommended actions. Tool lifetime can be extended and higher tool performance can be achie-
ved when the tool is cleaned and checked at regular intervals.

KNOWING ESSENTIAL FIELD TROUBLE SHOOTING 12
INDEX
POSSIBLE CAUSES NAILS
Issue Visual Criteria Trouble Possible cause Action
Nail stand-off
too high
No piston mark visible,
nail head stays off,
stand-off too high
Deck is not fas-
tened properly to
the beam
Power setting too
low or cartridge
not strong enough
Dial up power
setting or increase
strength of cartridge
Nail stand-off
is too low
Washer compressed,
piston mark clearly
visible
Deck is not fas-
tened properly to
the beam
Power setting too
high or cartridge
is too strong
Dial down power
setting or decrease
strength of cartridge
Nail stand-off
is OK
Washer compressed,
piston mark slightly
visible, deck at – no
deformation
– – –
Gap between
deck prole
and beam
Nail stand off OK or
too low, deck slightly
deformed
Deck prole
does not lay solid
on the beam
Gap caused by
slope of the deck
or local effects
Avoid gap between
sheet and beam or
fasten at the right
side of the beam
Beam miss
Nail stand off OK or too
low, sheet metal one
sided deformed (edge
of the beam visible)
Beam miss Deck not marked Mark the deck
Issue Visual Criteria Trouble Possible cause Action
Nail stand-off
too high
No piston mark visible,
nail head stays off,
stand-off too high
Deck is not fas-
tened properly to
the beam
Power setting too
low or cartridge
not strong enough
Dial up power
setting or increase
strength of cartridge
Nail stand-off
is OK
Washer compressed,
piston mark clearly
visible, deck at – no
deformation
– – –
Nail stand-off
is too low
Washer over compres-
sed, deck deformed,
stand-off too low
Deck is not fas-
tened properly to
the beam
Power setting too
high or cartridge
is too strong
Dial down power
setting or decrease
strength of cartridge
Gap between
deck prole
and beam
Nail stand off OK or
too low without piston
clear mark
Deck prole
does not lay solid
on the beam
Gap caused by
slope of the deck
or local effects
Avoid gap between
sheet and beam or
fasten at the right
side of the beam
Beam miss
Nail stand off OK or too
low, sheet metal one
sided deformed (edge
of the beam visible)
Beam miss Deck not marked Mark the deck
X-ENP2K-20
X-ENP-19