Viking MB 4 R, Instruction Manual

Page: 48 / 368

0478 111 9929 B - EN
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– Spark plug dirty.
Remedy:
– Clean lawn mower housing (detach
spark plug socket!). ( Ö 12.1)
– Select a higher cutting height or reduce
the pushing speed. ( Ö 8.5)
– Empty fuel tank, clean fuel line and
carburettor.
#
– Clean fuel tank.
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– Clean air filter.
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– Clean spark plug.
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Fault:
Engine overheating.
Possible cause:
– Oil level in engine too low.
– Cooling ribs dirty.
Remedy:
– Change engine oil. ( Ö 7.6)
– Clean cooling ribs. ( Ö 12.1)
Fault:
Excessive vibration during operation.
Possible cause:
– Cutting unit defective.
– Engine mounting loose.
Remedy:
– Check mowing blade, blade shaft and
blade fastening (blade fastening screw
and retaining washer), and repair if
necessary.
#
– Tighten engine mounting bolts.
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Fault (MB 4 RT, MB 4 RV, MB 4 RTP):
No drive when self-propulsion lever is
actuated.
Possible cause:
– Self-propulsion cable damaged
(e.g. kinked)
Remedy:
– Replace cable
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Fault:
Poor cut, lawn turning yellow
Possible cause:
– Mowing blade is blunt or worn,
Remedy:
– Sharpen or replace the mowing blade
( Ö 12.3), ( Ö 12.4),
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20. 1 Handover confirmation
20.2 Service confirmation
Please hand this instruction manual
to your VIKING specialist dealer in
the case of maintenance work.
He will confirm the service operations
performed in the pre-printed boxes.
20. Service schedule
Service performed on
Next service date
22