Good day all. I am investigating a case of a serious accident which involved the bucking of a boom cylinder of a 36m truck mounted pump. if anyone else has had a similar experience please come forward.

Todd

can you tell us what happen or share any pictures with us?

Sounds like a lawyer looking for something. 

Ready mix company was operating a 36m boom pump, correct stabilised and normal operating conditions. suddenly one of the boom cylinders buckled (bent) and the whole boom came crashing down leaving a fatality. I am not a lawyer but a dealer selling pumps and would like to see whether anyone had such an experience so we all learn from it and avoid similar cases. I am just trying to help all other users out there.

here is a photo to help you understand the failure.

That hydraulic cylinder is too small. Compared to other 36m booms, the hydraulic cylinders that control the 3rd section are considerably larger. Larger cylinder, larger chrome rod, larger pins & pin boss's. The levers are noticeably smaller as well. Poor structural design.  

It was the second section, just for record purposes, but very good point indeed. i would like to compile some info on typical diameters on most major pumps.

can anyone share some diameters for chrome shafts on the cylinder that opens the second boom on a 4 element 36m pump please. and pin diameters perhaps too that hold the cylinder to the boom and articulated joint?

cheers

Did this happen in the US? 

No. Europe. has anyone seen this happen ever? 

years ago I saw a tip section cylinder do this

thanks for getting back. you mean the cylinder on the last and smallest section?

what size of pump was it? do you have any photos? was anybody hurt?

was it a material issue? thanks