Hilti DSH 700-X Mode D'emploi Original page 26

9 Troubleshooting
Trouble or fault
Cutting disc slows down or
stops completely while cut-
ting.
High vibration, disc wanders
off the cutting line.
The saw doesn't start or is
difficult to start.
18 English
Possible cause
Excessive cutting pressure applied
(cutting disc stalls in the kerf) or
pressure applied to the cutting disc
from the side.
The cutting disc is not correctly
fitted and tightened.
Wrong direction of rotation.
The forward section of the saw arm
is loose.
The cutting disc is not correctly
fitted and tightened.
Cutting disc is damaged (or unsuit-
able specification, cracked, seg-
ments missing, bent, overheated,
deformed, etc.).
The centering bushing is fitted in-
correctly.
The fuel tank is empty (no fuel in
the carburetor).
Air filter clogged with dirt or dust.
The engine 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
carburetor).
No ignition spark visible or spark is
too weak (seen when spark plug is
removed).
Engine compression is too low.
The ambient temperature is too
low.
The spark arrestor or exhaust exit
is clogged.
Action to be taken
▶ Reduce pressure when cutting
and guide the product in a
straight line.
▶ Check how it is fitted and the
tightening torque.
▶ Fit the cutting disc. → page 10
▶ Have the product repaired by
Hilti Service.
▶ Check how it is fitted and the
tightening torque.
▶ Change the cutting disc.
▶ Check that the diameter of the
arbor hole in the cutting disc
matches the centering collar
of the cutting disc centering
bushing.
▶ Fill the fuel tank. → page 9
▶ Change the air filter.
▶ Remove the spark plug, dry the
plug and allow the cylinder to
dry out.
▶ Empty the fuel tank and flush
out the tank and fuel supply line.
▶ Fill the fuel tank with the correct
fuel.
▶ Remove the air from the fuel
line by operating the fuel pump
several times.
▶ Clean the fuel tank and change
the fuel filter.
▶ Clean the spark plug to remove
carbon deposits.
▶ Check the spark plug electrode
gap and set it correctly.
▶ Change the spark plug.
▶ Check the ignition coil, cable,
plug connections and switch
and change the defective part if
necessary.
▶ Check the engine compression
and, if necessary, replace worn
parts (piston rings, piston,
cylinder, etc.).
▶ Allow the saw to warm up to
room temperature and repeat
the starting procedure.
▶ Clean the spark arrestor or
exhaust exit.
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