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2008-03-18 Workshop Manual, Stiga Primo 6 Mower Decks 8
6.3.4 Synchronising blades
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.
Correctly synchronised blades must be offset
90° from each other. See the figure.
Always check synchronisation after a collision.
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 must be
opposite each other for an intact deck. When
torque limiting has deployed, the arrows are
not opposite each other.
The blade member is incorrectly installed on
the blade shaft. Can be installed in three
different positions. See (R).
6.3.5 Safety
To reduce the risk of accidental injury in the
event of a collision and to protect important
parts in the cutting deck, a force limiter is
integrated as follows.
• Shear bolts between blades and blade bar.
• Torque limiting between gear wheels and
blade shaft.
• Possibility of positive drive belt slipping on
the plastic gear wheels.
R
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