– Clean air filter.
– Clean spark plug.
Fault:
Mowing channel blocked.
Possible cause:
– Mowing blade is worn.
– Mowing grass which is too long or too
wet.
– MB 545 VS: Engine speed is too low.
Remedy:
– Replace mowing blade. (
– Adapt cutting height and mowing speed
to mowing conditions. (
– MB 545 VS: Set throttle lever to MAX
position. (
13.4)
Fault:
Poor cut, lawn turning yellow.
Possible cause:
– Blade is blunt or worn.
– Mowing speed is too high in relation to
cutting height.
– MB 545 VS: Engine speed is too low.
Remedy:
– Sharpen or replace blade (
(
14.5),
– Reduce mowing speed and/or select
correct cutting height (do not work at
lowest cutting height). (
– MB 545 VS: Set throttle lever to MAX
position. (
13.4)
Fault:
Engine overheating.
Possible cause:
– Oil level in engine too low.
– Cooling ribs dirty.
Remedy:
– Change engine oil. (
8.6)
0478 111 9930 A - EN
– Clean cooling ribs. (
Fault:
No drive when self-propulsion lever is
actuated.
Possible cause:
– Self-propulsion cable incorrectly
adjusted.
– Self-propulsion cable defective (e.g.
kinked).
– V-belt worn.
– Gearbox defective.
14.4)
Remedy:
12.), (
9.5)
– Check cable adjustment. (
– Replace cable.
– Replace V-belt.
– Replace gearbox.
Fault:
Vario drive speed control not functioning.
Possible cause:
– Vario drive lever moved in wrong
direction.
– Vario drive cable disengaged or
damaged (e.g. kinked).
14.4),
Remedy:
– Move Vario drive lever in correct
direction. (
– Attach or replace Vario drive cable.
9.5), (
13.8)
Fault:
Excessive vibration during operation.
Possible cause:
– Blade fastening screw(s) loose.
– Blade imbalance due to incorrect
sharpening or fracture.
– Cutting unit defective.
14.2)
14.3)
13.8)
– Engine mounting loose.
Remedy:
– Tighten blade fastening screw(s).
(
14.5)
– Re-sharpen (balance) or replace blade.
(
14.6), (
14.7),
– Check blade, blade shaft and blade
fastening and repair if necessary.
– Tighten engine mounting bolts.
22. Service schedule
22.1 Handover confirmation
22.2 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.
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