Care And Maintenance - Hilti DX 76 Operating Instructions Manual

8. Care and maintenance

When this type of tool is used under normal operating
conditions, dirt and residues build up inside the tool and
functionally relevant parts are subject to wear. Regular
inspections and maintenance are thus essential in order
to ensure reliable operation:
Recommended interval for cleaning the tool and check-
ing the condition of the piston and piston stopper:
At least daily when the tool is subjected to intensive
use
After 3,000 fasteners have been driven, at the lat-
est
-WARNING-
The tool must be unloaded before carrying out care and
maintenance.
The tool may become hot during
operation.
You could burn your hands.
Wear protective gloves before
carrying out care and maintenance.
8.1 Care of the tool
Clean the casing of the tool at regular intervals with a
damp cloth.
-NOTE-
Do not use a spray or steam-cleaning system for clean-
ing! Never operate the tool when the ventilation slots
are unobstructed. 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 regu-
lar intervals and check that all controls operate properly.
Do not operate the tool when parts are damaged or when
the controls do not operate properly. If necessary, have
the tool repaired at a Hilti service centre.
Use the tool only with the recommended cartridges and
power settings. Use of the wrong cartridges or use of
excessively high power settings may lead to premature
failure of parts of the tool.
-CAUTION- when cleaning:
Never use grease for the m aintenance/lubrication of
parts of the tool. This m ay lead to m alfunctions. Use
only Hilti lubricant spray or a product of com parable
quality.
The residues deposited inside DX tools contain sub-
stances that may be injurious to your health:
– Do not inhale any dust or dirt while cleaning.
– Keep the dust or dirt away from foodstuffs.
– Wash your hands after cleaning the tool.
-CAUTION-
8.2.1 Checking and replacing the piston and piston
stopper
-NOTE-
– If the tool is used incorrectly (e.g. no fastener loaded
in the tool before firing or the fastener is driven into
unsupported sheet metal), the piston may become
jammed against the piston stopper. Should the pis-
ton and piston stopper becom e fully seized in this
way, these parts have reached the end of their life.
The tool cannot be cycled when in this status.
– The condition of the piston and piston stopper must
be checked at regular intervals and at least daily.
-WARNING-
Check that there are no cartridges in the tool.
Check that there are no fasteners in the tool or maga-
zine.
-CAUTION-
Parts of the tool may become very hot after a period of
use. Protective gloves m ust be worn if the following
maintenance procedure is carried out before the tool
has been allowed to cool down.
1. Unscrew and remove the fastener guide (or fastener
magazine).
2. Pull the piston out of the piston guide.
3. Check the piston for damage. If signs of damage
are found, the piston AND the piston stopper must
be replaced.
-NOTE-
Check the piston for straightness by rolling it on a smooth
surface.
Never use a worn or damaged piston and do not attempt
to manipulate or modify the piston.
4. If the piston has to be replaced, also rem ove the
piston stopper (with the aid of the piston) from the
fastener guide.
5. Insert the piston stopper the right way round (rub-
ber toward the front) in the piston guide (or fastener
magazine) to be fitted to the tool.
6. Insert the piston in the piston guide in the tool.
7. Screw the fastener guide (or fastener m agazine)
onto the piston guide as far as it will go and then
turn it back until it engages.
8. Cycle the tool once with the cycling grip.
8.2.2 Cleaning the piston guide
-WARNING-
Check that there are no cartridges in the tool.
Check that there are no fasteners in the tool or maga-
zine.
-WARNING-
Parts of the tool may become very hot after a period of
use. Protective gloves m ust be worn if the following
maintenance procedure is carried out before the tool
has been allowed to cool down.
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