Short description because I took the time to write the whole saga and then the page vanished.
New water pump on a T444. Got the pump from Navistar in February 2022.
Can you see what is missing?
It is where the fan clutch attaches. It is a factory pressed on part and should never separate. Navistar agreed and sent me a new pump.
So whats wrong with this picture?
If you said, "looks like the pump shaft is missing, or broken." give yourself a pat on the back.
That's right, just 9 miles after installing the new pump the shaft broke sending my fan into the intercooler and tearing up an idler pulley and the serpentine belt.
Ive been turning wrenches since the early 70s and I have never seen the likes of either of these failures much less one right after the other.