Stihl GHE 420 - Service Schedule; Handover Confirmation; Service Confirmation; Troubleshooting

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DEFRNLITESPTNOSVFIDAPLSL EN
0478 201 9916 A - EN
Fault:
Motor does not start
Possible cause:
– Motor overload protection activated
– No mains voltage
– Electric cable, plug, plug connector or
switch defective
– Fuse in UK plug damaged (only applies
to machines for UK)
– Feed chute ATO 400 not properly
closed – safety cut-off switch actuated
(safety interlock)
– Blade disc blocked
Remedy:
– Allow machine to cool down (Ö 8.7)
– Check power cable and fuse
 (Ö 10.1)
– Check cable, plugs, connector and
switch and replace if necessary (by
electrician)  (Ö 10.1)
– Replace fuse  (Ö 10.1)
– Close feed chute ATO 400 properly and
fasten (tighten On- / Off switch) (Ö 7.6)
– Remove feed chute and remove
shredder deposits from the housing
(Important: disconnect the power cable)
(Ö 11.2)
Fault:
Reduced shredding performance
Possible cause:
– Blunt blades
– Incorrectly ground blades
– Power cable too long
– Bent blade disc
– GHE 450: Incorrect rotational direction
of blade disc
Remedy:
– Reverse or sharpen blades  (Ö 11.7),
(Ö 11.8)
– Sharpen blades correctly  (Ö 11.8)
– Use shorter power cable (Ö 10.1)
– Check blade disc visually 
– GHE 450: Change rotational direction
of blade disc (Ö 10.7), (Ö 10.8)
Fault:
Shredding material is not drawn in
Possible cause:
– GHE 450: Incorrect rotational direction
of blade disc
– Blunt or incorrectly ground blades
– Gap between the two blades (hard
material blade disc)
– Blade cover not removed
Remedy:
– GHE 450: Change rotational direction
of blade disc (Ö 10.7), (Ö 10.8)
– Regrind blade and ensure sharpening
angle is exactly correct  (Ö 11.8)
– Install blades onto the hard material
blade disc without a gap (Ö 11.7)
– Remove blade cover (Ö 7.4)
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.
18. Troubleshooting
 If necessary, contact a specialist
dealer; STIHL recommends STIHL
specialist dealers.
19. Service schedule
Service performed on
Next service date
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