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Not really a disaster but....

Not really a disaster but....

Not really a disaster but....

(OP)
...I've never seen this happen before. I don't know the particulars, a friend sent it to me, but it happened in Brooklyn about a month ago. I assume no one was hurt because it didn't make the news.

RE: Not really a disaster but....

I wonder if the way that rod buckled, forcing the cylinder to support the jib, is a deliberate graceful degradation feature or if they were just astonishingly lucky the whole thing didn't collapse.

A.

RE: Not really a disaster but....

The relief valves should have relieved before the cylinder rod buckled.

RE: Not really a disaster but....

Wonder if it might be a fatigue, where the crane had been operating with a known bowed rod for possible years and it finally gave way.
I thought of this due to when I purchased a used utility tractor decades back, one of the loader bucket cylinders had a slight bow. I proceeded to replace it TILL I got the price for a John Deere part! Thus the bowed rod has been in service ever since.

RE: Not really a disaster but....

Keith,

It wasn't until someone mentioned bowed cylinder that I knew what to look for in the pic...

Dan - Owner
http://www.Hi-TecDesigns.com

RE: Not really a disaster but....

Yeah Dan! I stared at that picture for a good minute and since that cylinder so nicely conformed to the bottom of the boom didn't see it. Of course once you see it it's glaring.

Keith Cress
kcress - http://www.flaminsystems.com

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