Hilti DSH 700 Mode D'emploi page 21

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
en
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.
1. Use a gentle twisting motion to pull the cable con-
nector off the spark plug.
2. Use the spark plug wrench to unscrew and remove
the spark plug from the cylinder.
3. If necessary, clean the spark plug electrode with a
soft wire brush.
4. Check the spark plug gap (0.5 mm) with the aid
of a feeler gauge and reset it to the correct gap if
necessary.
5. Fit the ignition cable connector to the spark plug and
hold the threaded section of the spark plug against
the cylinder.
6. Move the start / stop switch to the "start" position.
CAUTION Avoid touching the spark plug elec-
7.
trode.
Pull the starter cord (press the decompression valve
first).
An ignition spark must now be clearly visible.
8. Use the spark plug wrench to screw the spark plug
into the cylinder (12 Nm).
9. Fit the ignition cable connector to the spark plug.
14
8.6 Retensioning the drive belt 15
CAUTION
A slack drive belt can damage the machine. Retension
the drive belt if it slips when a load is applied to the
cutting disc.
NOTE
The drive belt must be replaced as soon as the wear
mark on the saw arm becomes visible after retensioning.
This machine is equipped with a semi-automatic, spring-
assisted drive belt tensioning system.
1. Slacken the three clamping nuts on the forward
section of the saw arm approx. one complete turn.
2. After releasing the nuts, the drive belt is tensioned
automatically by spring pressure.
3. Retighten the three clamping nuts securely (18 Nm).
8.7 Changing the drive belt 16
NOTE
After doing this, check that the cutting disc can be turned
easily by hand and that all screws have been tightened
securely.
1. Slacken the three clamping nuts on the forward
section of the saw arm approx. one complete turn.
2. Release the tension on the drive belt by turning the
belt tensioning cam counterclockwise carefully as
far as it will go (until resistance is felt, i.e. approx. ¼
of a turn).
3. Remove the upper and lower clamping nuts and the
two securing screws from the forward section of the
saw arm and remove the drive belt cover.
4. Release the four securing screws on the rear drive
belt cover and remove the cover.
5. Remove the defective drive belt. Place the new drive
belt carefully over the two drive pulleys.
6. Tension the drive belt by turning the belt tensioning
cam clockwise carefully as far as it will go (until
resistance is felt, i.e. approx. ¼ of a turn).
7. Fit the rear drive belt cover and secure it with the
four screws.
8. Secure the forward drive belt cover with the two
clamping nuts and two securing screws.
9. Tighten the three clamping nuts securely (18 Nm).
8.8 Adjusting the carburetor 17
CAUTION
Tampering with the carburetor settings may cause
damage to the motor.
The carburetor of this machine (jets H and L) has been
factory set for optimum performance and sealed to pre-
vent tampering. The idling speed of the machine (jet T)
may be adjusted by the user. All other adjustments must
be carried out at a Hilti service center.