Hilti DSH 700 Bedienungsanleitung Seite 41

Clean or replace the spark plug if the machine doesn't
start or is difficult to start.
Retension the drive belt if it slips when the cutting disc is
under load.
Readjust the motor idling speed if the cutting disc doesn't
stop rotating when the machine is idling.
8.2 Replacing the air filter 10 11
en
DANGER
The operator and bystanders must wear breathing
protection if the work causes dust.
CAUTION
Dust entering the machine may cause irreparable
damage. Never operate the machine if the air filter is
damaged or missing. When changing the air filter, the
machine should stand upright and should not be laid on
its side. Take care to ensure that no dust finds its way
onto the underlying filter screen.
NOTE
Change the air filter if motor performance drops notice-
ably or if the machine becomes difficult to start.
NOTE
In this machine, most of the dust is removed from the
air flow by a maintenance-free cyclone-type prescreen-
ing system. This preliminary air cleaning process greatly
reduces the amount of maintenance required compared
to conventional systems.
1. Release the securing screw on the air filter cover
and remove the cover.
2. Carefully remove the dust adhering to the air filter
and the filter chamber (use a vacuum cleaner).
3. Release the screws retaining the filter holder and
remove the air filter.
4. Fit the new filter and secure it with the filter holder.
5. Fit the air filter cover and tighten the retaining
screws.
8.3 Replacing a broken starter cord 12
CAUTION
The housing may suffer damage if the starter cord is too
short. Never shorten the starter cord.
1. Unscrew the three securing screws and remove the
starter assembly.
2. Remove the remaining pieces of the starter cord
from the spool and the starter handle.
3. Make a secure knot in the end of the replacement
starter cord and then pass the free end of the cord
through the hole in the spool from above.
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4. Pass the end of the cord through the opening in the
starter housing from below, also through the starter
handle from below, and then make a secure knot in
the end of the cord.
5. Pull a length of the starter cord out of the housing
as shown in the illustration and pass it through the
slot in the spool.
6. Hold the cord securely close to the slot in the spool
and then rotate the spool in a clockwise direction as
far as it will go.
7. Rotate the spool back from its end point at least a ½
revolution, max. 1 ½ revolutions, until the slot in the
spool is in alignment with the opening in the starter
housing.
8. Hold the spool securely and pull the free end of the
cord at the starter handle out of the housing.
9. Hold the cord under tension, release the spool and
allow the starter cord to be pulled in.
10. Pull the starter cord out as far as it will go and check
to ensure that the spool can be turned by hand at
least a further ½ turn in a clockwise direction. If this
is not possible, spring tension must be reduced by
one revolution in a counterclockwise direction.
11. Fit the starter assembly to the machine and press it
down gently.
Pull the starter cord slightly until the coupling en-
gages and the starter assembly is fully seated.
12. Secure the starter assembly with the three retaining
screws.
8.4 Checking and replacing the fuel filter 13
NOTE
Check the condition of the fuel filter regularly.
NOTE
When refueling the machine, take care to ensure that no
dirt or foreign matter finds its way into the fuel tank.
1. Remove the cap from the fuel tank.
2. Pull the fuel filter out of the fuel tank.
3. Check the condition of the fuel filter.
The filter must be replaced if badly soiled.
4. Push the fuel filter back into the fuel tank.
5. Close the cap on the fuel tank.
8.5 Cleaning the spark plug / setting the spark plug
gap / replacing the spark plug 14
CAUTION
The spark plug and parts of the motor may be hot
immediately after the machine has been running. To
avoid burning your hands, wear suitable protective gloves
or allow the machine to cool down before touching its
parts.
Use only spark plugs of the type NGK‑CMR7A-5.