Blades Navigator blade mounting question

OldMasterTech

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May 5, 2013
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New Exmark Navigator:

I hit a small 6" piece of a 2x4 which broke all 4 shear bolts. Ordered & received parts from my dealer along with an exploded view printout of the deck.

My question refers to the space between the blade driver/blade assy. and the blade retaining bolt/washer. Why is this space present? When the shear bolts break, the space allows the blades to damage the baffles and sustain damage to themselves.

I don't want to re-engineer a potentially hazardous component but I think a loose metal washer or a tight hard plastic washer could be used in that space to hold the blades level when the shear bolts break?

TIA for any comments.
 

Exmark fan

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From my understanding. The are there to prevent over-tightening of the bolt. Which in turn will help when hitting 2x4's. It will cause less damage to the transmission
 
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