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VERY Scary and expensive


benedmonds
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For what its worth.....

 

I had this on a 150s a few times. What happened was the alloy fins had worked loose. Once was incorrect torque (I think) but the rest seemed to be the leading edge of the fins had lifted slightly (or had debris under when they were fitted). I assume this because the dusty residue on the flywheel extended under where the fins were.

 

I always balst the fins and flywheel when refitting to avoid this happening. It seems you only need a tiny gap to let the air under it.

 

Glad no one got hurt mate

 

You should clean the mating faces of the blade/ flywheel evrey time you change them as a matter of course, and torque them too really.:001_smile:

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You should clean the mating faces of the blade/ flywheel evrey time you change them as a matter of course, and torque them too really.:001_smile:

 

True! But if you look at his pics the blades are still there. I'm talking about the fins. Maybe i didnt write my post clearly :blushing:

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Yes they bolt on with 3 hex bolts each. I re-read the original post and checked some papers and it would seem one I replaced them on shed its fins at just over 1300 hours so I wonder if they need changing out before that as part of the servicing??

 

Not a good design - they are bolt on and alloy so any slight flex and they shatter over time!!

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Amazingly, when we first started working with chippers, back in the day, on hot days we used to get in front of the discharge chute to cool off.:thumbup:

One day the blades disintegrated and the bits came out from both the discharge and feed hopper.:thumbdown:

Needless to say we didn't use the entec patented air con any more.:blushing:

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