Operating Instruction DSH 700X-900X

18 English 2271385
*2271385*
9 Troubleshooting
Trouble or fault Possible cause Action to be taken
Cutting disc slows down or
stops completely while cut-
ting.
Excessive cutting pressure applied
(cutting disc stalls in the kerf) or
pressure applied to the cutting disc
from the side.
▶ Reduce pressure when cutting
and guide the product in a
straight line.
The cutting disc is not correctly
fitted and tightened.
▶ Check how it is fitted and the
tightening torque.
Wrong direction of rotation. ▶ Fit the cutting disc. → page 10
The forward section of the saw arm
is loose.
▶ Have the product repaired by
Hilti Service.
High vibration, disc wanders
off the cutting line.
The cutting disc is not correctly
fitted and tightened.
▶ Check how it is fitted and the
tightening torque.
Cutting disc is damaged (or unsuit-
able specification, cracked, seg-
ments missing, bent, overheated,
deformed, etc.).
▶ Change the cutting disc.
The centering bushing is fitted in-
correctly.
▶ Check that the diameter of the
arbor hole in the cutting disc
matches the centering collar
of the cutting disc centering
bushing.
The saw doesn’t start or is
difficult to start.
The fuel tank is empty (no fuel in
the carburetor).
▶ Fill the fuel tank. → page 9
Air filter clogged with dirt or dust. ▶ Change the air filter.
The engine is flooded (spark plug
wet).
▶ Remove the spark plug, dry the
plug and allow the cylinder to
dry out.
Wrong fuel mixture. ▶ Empty the fuel tank and flush
out the tank and fuel supply line.
▶ Fill the fuel tank with the correct
fuel.
Air in the fuel line (no fuel reaching
the carburetor).
▶ Remove the air from the fuel
line by operating the fuel pump
several times.
The fuel filter is dirty or blocked (no
fuel or too little fuel reaching the
carburetor).
▶ Clean the fuel tank and change
the fuel filter.
No ignition spark visible or spark is
too weak (seen when spark plug is
removed).
▶ 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.
Engine compression is too low. ▶ Check the engine compression
and, if necessary, replace worn
parts (piston rings, piston,
cylinder, etc.).
The ambient temperature is too
low.
▶ Allow the saw to warm up to
room temperature and repeat
the starting procedure.
The spark arrestor or exhaust exit
is clogged.
▶ Clean the spark arrestor or
exhaust exit.