Troubleshooting - Viking GB 370 S Instruction Manual

19. Troubleshooting

@ See engine instruction manual.
If necessary, contact a specialist dea-
ler; VIKING recommends VIKING
specialist dealers.
Fault:
Engine will not start
Possible cause:
– Feed chute not properly closed
– Blade disc blocked
– No fuel in tank; fuel line blocked
– Inferior, dirty or old fuel in tank
– Spark plug socket detached from spark
plug; ignition lead not properly fastened
to socket
– Dirty air filter
– Spark plug dirty or damaged; incorrect
electrode gap
– Engine is flooded due to several
starting attempts
Remedy:
– Close feed chute properly and tighten
screws ( 7.7)
– Remove shredder deposits from the
housing (Important: first detach spark
plug socket)
– Top up fuel; clean fuel line (
– Always use fresh, good quality fuel,
normal unleaded petrol; clean
carburettor ( 7.9)
– Connect spark plug socket; check
connection between ignition lead and
socket
– Clean air filter
46
– Clean or replace spark plug; adjust
electrode gap
– Remove spark plug and dry; pull recoil
starter rope repeatedly with the spark
plug removed (throttle lever in STOP
position)
Fault:
Engine overheating
Possible cause:
– Dirty cooling ribs
– Oil level in engine too low
– Surface of engine covered in shredding
material
Remedy:
– Clean cooling ribs (
– Top up engine oil (
– Remove shredding 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° (
Fault:
7.9)
Reduced shredding performance
Possible cause:
– Blunt blades
– Incorrectly ground blades
– Bent blade disc
Remedy:
– Re-sharpen or replace blades (
– Sharpen blades correctly (
– Visually inspect blade disc and replace
if necessary (
11.2)
7.9)
11.3)
11.3)
11.3)
7.6)
Fault:
Excessive vibration during operation,
abnormal noises, rattling
Possible cause:
– Faulty blade disc or blades
– 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
0478 216 9901 B - EN