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Fault:
Engine overheating
Possible cause:
– Dirty cooling ribs
– Oil level in engine too low
– Surface of engine covered with
shredded material
Remedy:
– Clean cooling ribs ( 11.2)
– Top up engine oil ( 7.9)
– Remove shredded material from the
engine
Fault:
Shredding material is not drawn in
Possible cause:
– Blunt or incorrectly ground blades
Remedy:
– Reverse or re-sharpen blade; ensure
sharpening angle of 30° ( 11.3)
Fault:
Reduced shredding performance
Possible cause:
– Blunt blades
– Incorrectly ground blades
– Bent blade disc
Remedy:
– Re-sharpen or replace blades ( 11.3)
– Sharpen blades correctly ( 11.3)
– Visually inspect blade disc and replace
if necessary ( 7.6)
Fault:
Excessive vibration during operation,
abnormal noises, rattling
Possible cause:
– Faulty blade disc or blades
46
– Loose engine mounting
– Bolts loose
Remedy:
– Check blade discs, blades, blade shaft,
screws, nuts, washers and bearings of
cutting unit, repair if necessary
– Tighten engine mounting bolts
– Ensure secure seating of bolts
19. Service schedule
19.1 Handover confirmation
19.2 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.
Service performed on
Next service date
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0478 216 9908 B - EN
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