Stihl 6290, Instruction Manual

Page: 42 / 446

0478 670 9906 A - EN
40
– Connect machine to another circuit
– Reduce working depth and feed speed
( Ö 7.4)
Fault:
Excessive vibration during operation
Possible cause:
– Scarifying unit defective
– Engine mounting loose
Remedy:
– Check blades, blade shaft, spacer
bushings, fastening and bearings of
scarifying unit and repair if necessary
(
Ö 11.5), (
#
)
– Screw down motor (
#
)
Fault:
Poor working results
Possible cause:
– Blades set too deep (bare patches, high
grass content in scarified material)
– Blade set too shallow (little or no lawn
thatch is removed)
– Blades have reached wear limit
– V-belt defective, worn or insufficiently
tensioned
Remedy:
– Reduce working depth ( Ö 7.4)
– Increase working depth ( Ö 7.4)
– Replace blades ( Ö 11.5), (
#
)
– Replace V-belt (
#
)
Fault:
Blades not turning freely
Possible cause:
– V-belt defective
– Scarifying unit defective
Remedy:
– Replace V-belt (
#
)
– Repair scarifying unit ( Ö 11.5), (
#
)
Fault:
Scarifying unit cannot be raised or lowered
Possible cause:
– Cable defective or detached
Remedy:
– Replace or repair cable (
#
)
Fault:
Working depth cannot be set
Possible cause:
– Scarifying unit in operating position
– Rotary handle or adjustment element
defective
Remedy:
– Place scarifying unit in transport
position ( Ö 7.3)
– Repair rotary handle or adjustment
element (
#
)
20. 1 Handover confirmation
20.2 Service confirmation
Please hand this instruction manual
to your STIHL specialist dealer in
the case of maintenance operations.
He will confirm the service operations
performed in the pre-printed boxes.
20. Service schedule
Service performed on
Next service date
1 3