Carnage, input shaft failure. 600 Cat w/18 speed.

[mwilson]

Update. .



He was going right up the road when it grenaded. No strain or other issues.



We put heads together yesterday and what we believe is this...



This issue almost 100% of the time is in a truck powered either by an ACERT or C16 Cat. We THINK that due to the torque that those engines can produce at low RPM's the input shaft is getting stressed way more than in any other application. Some drivers will allow them to pull down to 1100 rpm and make that big clutch unit and Fuller trans just shake, rattle and roll... ...

So we are going to mandate an input shaft change on any clutch job involving those engines in an effort to protect us and save the customer a huge bill later on.



Mike.

 

[mwilson]

It looks to me like there was no damage to the transmission housing. Is that correct?



-Ryan

I haven't spoken with him again, it does appear that he may have lucked out on that. It will be a minor miracle but possible.



Mike.

 

[Mikey-KE7LBB]

Did he do this?

http://www.youtube.com/watch?v=RrB2aiEG8UQ



This??

http://www.youtube.com/watch?feature=endscreen&v=B5ZrVN5fPAk&NR=1



Or this before it broke???

http://www.youtube.com/watch?v=agCMM6lGqEk

 

[GCroyle]

I found my notes from back in 2008. My Tutor advised that "The 2" spline was at the end of it's life". My interretitation is that you got all out of it that can be had. He advised that the next spline would be a 60mm / 2. 36" 13 tooth involute. But looks like I don't have any torque numbers to go with it.



Anybody seen a 13 tooth input shaft?

 

[mwilson]

I found my notes from back in 2008. My Tutor advised that "The 2" spline was at the end of it's life". My interretitation is that you got all out of it that can be had. He advised that the next spline would be a 60mm / 2. 36" 13 tooth involute. But looks like I don't have any torque numbers to go with it.



Anybody seen a 13 tooth input shaft?

Probably a hard sell to the beancounters everywhere.



I have not heard or read any chatter about bigger input shafts, but I do agree with the concept.

A 2" input shaft really can't be expected to stand modern day torque ratings for much longer



Mike. .