Quote:
Originally Posted by 1976gmc20
Have you actually had the PTO off of the transmission ???
Are you sure no gears are engaging the transmission gear?
I'm wondering if it is mounted upside down on the transmission. That would explain the output shaft to nowhere.
All I really know about them is that I just found a decent looking PTO in the junkyard and bought it cheap and brought it home and it fit right onto my SM420 transmission. I have no idea now what brand it was since I sold the truck 20+ years ago. It seems to me like it was made to swap the gears around and shift the output rear to front (like for a winch or something) but I think it worked for me just the way it was.
I cut a slot in the floorboard and bolted a short piece of angle iron next to it. Then a hole in the vertical flange for a pivot bolt for a flat piece of steel about 1" x 18" for a lever, bolted directly to the shift rod in the PTO at the lower end. Worked great, unlike the log loader that it was powering.
It can't be that difficult if even I managed to figure it out  |
well this one was given to me as " removed from a big 5 speed truck transmission" so yes it has been off. if I mounted it "upside down" then the input gears and my transmission output gears would not line up....so I am pretty sure it has to go this way. as it is the input gear on the PTO look like they would mesh fine IF the shaft was swapped end for end. my transmission has a PTO output case on the other side as well but it is much bigger an 8 bolt instead of a 6 so no I cant put it over there either. not that big a deal I will pull it back off put it on the bench and tear it apart, just hoping for a little insight before I had to go figure it ll out on my own.