Hilti DX 76 PTR Original Operating Instructions page 25

2. If a fastener is not driven deeply enough, driving
power must be increased. Adjust the power regula-
tion wheel to the next higher setting. If a fastener is
driven too deeply, check to ensure that a supporting
member (e.g. a beam) is present at this point. Do not
drive fasteners into unsupported sheet metal. Check
to ensure that the metal sheets lie snugly against
the supporting structure or, respectively, that any
gaps beneath the sheets are kept to an absolute
minimum.
3. Drive a fastener.
4. Use the test gauge to check nail stand-off.
5. If the fastener is still not driven deeply enough or,
respectively, is driven too deeply, steps 2 to 4 must
be repeated until the correct depth is achieved. If
necessary, use a cartridge with a higher or lower
power rating.
7.3 Unloading the tool
7.3.1 Removing cartridges from the tool 7
WARNING
Do not attempt to forcibly remove cartridges from the
magazine strip or tool.
1. Advance the cartridge strip through the tool by mov-
ing the cycling grip until the strip is visible at the exit
aperture.
2. Pull the cartridge strip out of the tool at the cartridge
strip exit aperture.
7.3.2 Removing fastener strips from the tool 8
WARNING
Check that no cartridge strip is loaded in the tool. If a
cartridge strip is still present in the tool, operate the
cycling grip until the strip projects from the tool and
then pull the strip out of the cartridge strip exit by
hand and remove it from the tool.
CAUTION
The fastener strip will be ejected by spring pressure.
1. Push the fastener strip 5 mm further into the
magazine and hold it securely in this position.
2. Push the catch forward with the thumb and hold it
in this position.
3. Remove the fastener strip from the magazine.
7.4 Changing the nail magazine or fastener guide
(accessory)
7.4.1 Disassembly 9
WARNING
All cartridges must be removed from the tool. All
nails must be removed from the nail magazine or 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.
1. Check that the tool cycling grip is in its starting
position.
2. Unscrew and remove the fastener guide (or fastener
magazine).
3. Remove the piston brake from the fastener guide.
7.4.2 Assembly 10
1. Insert the piston brake, the right way round, in the
piston guide (or fastener magazine) that is to be
fitted to the tool.
Exception: With the HVB base plate, the piston
stopper must be inserted the right way round (rubber
part toward the front).
2. Check that the tool cycling grip is in its starting
position.
3. Insert the correct piston in the piston guide in the
tool.
4. Screw the fastener guide (or fastener magazine) onto
the piston guide as far as it will go and then turn it
back until it engages.
5. Cycle the tool once with the cycling grip.
7.5 Driving fasteners using the single fastener
guide (accessory)
WARNING
Check that the spall guard is fitted to the tool.
7.5.1 Inserting the fastener in the single-fastener
tool 11
1. Turn the tool so that the fastener guide is pointing
upwards.
2. Insert the fastener in the tool from above.
7.5.2 Selecting the cartridge 3
1. Determine the thickness of the material to be
fastened and the grade of the supporting steel.
2. Select a suitable cartridge and power setting ac-
cording to the cartridge recommendations.
NOTE For details of recommended cartridges,
please refer to the applicable approvals or the Hilti
Fastening Technology Manual.
7.5.3 Inserting the cartridge strip 4
Push the cartridge strip, as far as it will go, into the
cartridge strip guideway on the side of the tool.
7.5.4 Driving fasteners with the single-fastener tool
1. Press the tool against the working surface at right
angles.
2. Drive the fastener by pulling the trigger.
3. Prepare the tool for driving the next fastener by
pushing the cycling grip back toward the rear of the
tool and then forward to its original position.
en
25