AS MOTOR AS 940 Sherpa 4WD XL Operator's Manual page 37

The blade does not V-belt is insufficiently tensioned
rotate or damaged.
Bowden cable is defective.
Strong vibrations dur- Imbalance of the blade caused
ing operation by incorrect sharpening or chips
on the blade.
Blade drive shaft is bent due to
collisions with foreign objects.
Engine fastening is loose.
Blade fastening is loose.
Irregular noises Loose fastening elements.
Silencer is defective.
Hydrostatic drive is overheated. Cool down (see also Maintenance and
Hydrostat defective.
Engine is smoking Air filter is dirty or drenched with
oil.
Oil level is too high.
Engine gets hot Ventilation grid is dirty.
Oil level in the engine is too low. Refill engine oil (see operating instruc-
Cooling fins of the engine are
dirty.
Uneven cut, lawn be- Blade is dull or worn.
comes unsightly
Speed is too high proportion-
ately to the cutting height.
Housing of the mower is heavily
contaminated.
Different tire pressure.
Mower housing is not parallel to
the ground.
Mulching result with Speed is too high.
high plant material
not satisfactory
Mulching result with Plant material is ejected too
low plant material not quickly.
satisfactory
Housing is jammed Mowed grass was too long or
too damp.
Blade is worn.
Engine speed is too low despite
full power.
The device does not Brake is adjusted incorrectly,
stop when the brake worn, or defective.
is activated
The engine does not Switching off system is defect-
switch off ive.
The tires become flat Thorns or sharp objects dam-
age the tires.
Authorised service centre.
Authorised service centre.
Have blade resharpened and balanced
by an authorised service centre. Re-
place a damaged blade immediately.
Authorised service centre.
Authorised service centre.
Authorised service centre.
Authorised service centre.
Authorised service centre.
cleaning).
Authorised service centre.
Maintain or replace air filter (see Main-
tenance).
Have authorised service centre lower
the oil level up to the marking.
Clean ventilation grid.
tions of the engine manufacturer).
Have cooling fins cleaned by authorised
service centre.
Have blade resharpened and balanced
by an authorised service centre. Re-
place a damaged blade immediately.
Reduce speed and/or select the correct
cutting height.
Clean.
Check the tire pressure.
Adjust (authorised service centre).
Reduce speed.
Increase speed.
Adjust cutting height and mowing speed
to the mowing conditions.
Authorised service centre.
Authorised service centre.
Check the parking brake (see chapter
Maintenance). Authorised service
centre.
Close the fuel valve.
Authorised service centre.
If necessary, use tire protection gel (au-
thorised service centre).
Troubleshooting
37