Cummins N-14

Twisted off? Where at? That is a pretty hefty piece of metal to just twist off. Air compressor seize up?

 

twisted off between the pulley and gear housing? how's that possible? the pulley, obviously belt driven would not have enough torque to twist that shaft...if anything locked up the belt would bust. are sure it twisted apart? i know it sounds like a dumb question, but we should be sure of the failure.

 

the accessory shaft twisted off twice on my n14 also replaced everything that i could think of that might of caused the problem and it turned out it was the pulley that was bent and knocked the shaft out of balance put a brand new pulley and no problem ever since

 

mine twisted off at a truck stop so i had to replace it in a parking lot . I started like at 4 and by noon i had the truck running again. I don't recall messing around with the front cover but don't quote yet ill try to remember. You just remove the fuel pump, the air compressor and its pretty much straight forward repair. One thing that you might want to consider is that they sell the shaft separately or they sell the complete assembly if you buy the shaft alone you will need a machine shop to press it in for you i bought the complete assembly it was expensive though ($750) because scrap yard refused to sell it separately but anyway i called the previous owner and he said the shaft had already split before and that the cummins told him that the force of the impact had bent the pulley out of shape but that it needed to be ordered but the guy just told him to put it back together and that he'll have it replaced next trip the thing is he never replaced it . If you have any question i'd be glad to help you

 

the only trouble that i ran into was once i had the truck running and i had to clean up tools it started to rain but other than that everything was good