[BITList] Cat 793 Over-revved motor

[John Feltham]

  Warning.  Contains graphic and gorey visuals.

Downshift from 6th to 1st in a fully loaded haul truck!! 
  
  
This is what happens when a computer glitch dropped the transmission from 6th gear back to 1st whilst doing 60kph fully loaded with 230 tonnes of material. 

Below is what remains of a Caterpillar C175-16 – the 85L capacity V16 engine from Caterpillars’ second biggest dump truck, the 793, which has a gross power output of 1976 kW (2650 hp). 

Flat out it revs at around 2500 rpm. As big as they are, engines of this size don't like to over-rev at all; 100-200 rpm over will start to do damage.. God knows what it revved to when the glitch occurred… Maybe 3000-4000rpm. 

There was no compression lock up, just BANG! 

A new engine costs around $250k. With labour, shipping and collateral damage repairs, no change from $500K.





 

 
  
  


 
  
  

 
  
  

  
  
  
 

  
  
  
  

 
 


 

 

 
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