Dan107

Thanks for the info. The repair shop the truck is at said they pull the engine as well. I bought a warranty for the truck when I made the purchase and the shop is having to provide pics to satisfy them so it seems the process is moving really slow. The shop manager made suggestions of things he would do if it were "his" including pulling the pan and checking the mains and rod bearings, pulling the egr cooler to get to the oil pump for a flush, replace the oil filter housing....all I could see was $$$$ and lots of them.

From reading, it looks like this was a problem with the 2012 Macks. There was a service bulletin Mack sent out back then for a patch to slow failure. It's part of the gear system at the rear of the engine that drives other components.

Happy New Year Everyone! I have a 2012 Mack CXU13 and on 12/22/17 it appears that I had a bull gear failure. It rounded off the gears on the compressor and was making a lot of noise. It is currently at the shop, but I'm wondering what the procedure is to repair this. Does it require the engine to be pulled or can it be done the the transmission removed and still in frame? The repair facility is wanting to do several procedures that sound to me like lots of $$$$ and the shop boss keeps telling me this is a "major" repair. I understand the complexity of the repair, but they won't tell me what "major" means in dollars. Could someone help me out? Thanks in advance.

Figured it out and fault code went away.

Okay, I replaced the whole module along with new sensors. Is there a process to bleed the lines? Also, will the fault code clear by itself? Thank you for the help by the way, it is much appreciated!

Found it!

Am I looking in the right place?

Thank you! I'll check it out today...

Hello all! I am a new O/O with a 2012 Mack Pinnacle CXU13 MP8. The truck has been doing really well, but a few days ago dropped code sa0 spn3471 fmi7. From what I've found it has something to do with the 7th injector fuel pressure?? Could someone please point me in the right direction to fix this as I don't want this to cascade into something worse! Thanks in advance.