Operating Instruction DSH 700X-900X

*2271385*
2271385 English 19
Trouble or fault Possible cause Action to be taken
The saw doesn’t start or is
difficult to start.
The decompression valve is stiff to
operate.
▶ Make sure that the valve
operates freely.
Low engine power / poor
cutting performance
Air filter clogged with dirt or dust. ▶ Change the air 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.
Wrong fuel mixture. ▶ Empty the fuel tank and flush
out the tank and fuel supply line.
▶ Fill the fuel tank with the correct
fuel.
The disc specification is unsuitable
for the material to be cut.
▶ Change the cutting disc or ask
Hilti Service for advice.
Drive belt or cutting disc slips. ▶ Check that the cutting disc is
clamped securely.
▶ Have the product repaired by
Hilti Service.
Engine compression is too low. ▶ Check the engine compression
and, if necessary, replace worn
parts (piston rings, piston,
cylinder, etc.).
The product is used at an altitude
greater than 1500 meters above
sea level.
▶ Have the carburetor adjusted
by Hilti Service.
Incorrect carburetor setting (fuel /
air mixture).
▶ Have the carburetor adjusted
by Hilti Service.
Cutting disc rotates while the
engine is idling.
Idling speed is too high. ▶ Check the idling speed and
adjust it if necessary.
The half-throttle position is en-
gaged.
▶ Release the half-throttle posi-
tion.
Faulty centrifugal clutch. ▶ Change the centrifugal clutch.
Cutting disc doesn’t rotate. Inadequate drive belt tension or the
drive belt is broken.
▶ Have the product repaired by
Hilti Service.
Starter assembly doesn’t
work.
The clutch claws are not engaging. ▶ Clean the clutch claws so that
they move freely.
Starter cord is broken. ▶ Replace the starter cord.
10 Disposal
Most of the materials from which Hilti products are manufactured can be recycled. The materials must be
correctly separated before they can be recycled. In many countries, your old tools, machines or appliances
can be returned to Hilti for recycling. Ask Hilti Service or your Hilti representative for further information.
Drilling slurry
Disposal of drilling slurry directly into rivers, lakes or the sewerage system without suitable pretreatment
presents environmental problems.
▶ Ask the local public authorities for information about current regulations.
We recommend the following pretreatment:
▶ Collect the drilling slurry (for example, using a wet-type vacuum cleaner).
▶ Allow the drilling slurry to settle and dispose of the solid material at a construction waste disposal site
(addition of a flocculent may accelerate the settling process).