Edition
2016
Workshop Manual
PARK 120 - PARK 220
Chapter
8 Mower Decks
Page
72
8.5 Synchronising, blades
Attention!
Always check synchronisation after a collision.
The deck has synchronised blades.
If one of the blades has struck a solid object (e.g. a stone), the synchronisation may be
altered. This entails a risk of the blades colliding with each other.
90°
Correctly synchronised blades must be offset 90°
from each other. See the gure.
A
The blades (A) can be turned 1/3 of a turn in their
mountings. Select positions so that the blades are
offset 90° from each other.
If the blades are not synchronised, one or more
of the following faults may have occurred in the
cutting deck:
• The positive drive belt has slipped on the gear
wheels.
• Torque limiting between gear wheels and blade
shaft has deployed. The arrows in the gure
must be opposite each other for an intact deck.
When torque limiting has deployed, the arrows
are not opposite each other.
• The blades member is incorrectly installed
on the blade shaft. Can be installed in three
different positions.
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