Hilti DSH 700 Mode D'emploi page 23

Fault
High vibration, disc wanders off
the cutting line
en
Saw doesn't start or is difficult
to start
Low motor power / poor cutting
performance
16
Possible cause
Cutting disc is damaged (or unsuit-
able specification, cracked, segments
missing, bent, overheated, deformed,
etc.).
The centering bushing is fitted incor-
rectly.
The fuel tank is empty (no fuel in the
carburetor).
Air filter clogged with dirt or dust.
The motor is flooded (spark plug wet).
Wrong fuel mixture.
Air in the fuel line (no fuel reaching the
carburetor).
The fuel filter is dirty or blocked (no
fuel or too little fuel reaching the car-
buretor).
No ignition spark visible or spark
is too weak (when spark plug is re-
moved).
Motor compression is too low.
Very low temperatures.
Dirt or dust in the spark guard / ex-
haust exit.
The decompression valve is stiff to
operate.
Air filter clogged with dirt or dust.
No ignition spark visible or spark
is too weak (when spark plug is re-
moved).
The wrong fuel or dirt and water in the
fuel tank.
The disc specification is unsuitable
for the material to be cut.
Drive belt or cutting disc slips.
Remedy
Fit a new cutting disc.
Check that the mounting bore of the
cutting disc to be fitted corresponds
with the centering collar of the cutting
disc mounting flange.
Fill the fuel tank.
Replace the air filter.
Dry the spark plug and cylinder (re-
move the spark plug).
Disengage the choke lever and repeat
the starting procedure several times.
Empty the fuel tank and flush out the
tank and fuel lines. Fill the tank with
the correct fuel.
Remove the air from the fuel line
by operating the fuel pump several
times.
Clean the tank and fit a new fuel filter.
Clean the spark plug to remove car-
bon deposits.
Check the spark plug gap and adjust
it if necessary.
Fit a new spark plug.
Check the ignition coil, cable, con-
nectors and switch and replace the
parts if necessary.
Check the motor compression and, if
necessary, replace worn parts (piston
rings, cylinder, etc.
Allow the machine to warm up slowly
to room temperature and repeat the
starting procedure.
Clean the parts.
Release the valve.
Replace the air filter.
Clean the spark plug to remove car-
bon deposits.
Check the spark plug gap and adjust
it if necessary.
Fit a new spark plug.
Check the ignition coil, cable, con-
nectors and switch and replace the
parts if necessary.
Flush out the fuel system, replace the
fuel filter and refill with fuel.
Change the specification or request
advice from Hilti.
Check the drive belt tension and disc
clamping parts and eliminate the fault.