Tractor Repair: MF 135, massey ferguson tractors, massey tractors

Question
I just got this stuck in the yard in reverse. The gear shift seems jammed up. Is an early 1970 model 135 wth a 3 cylinder perkins gas. Any thoughts?

Answer
HiJohn
       This is from my web site on Massey Ferguson tractors there is a lot more on it that could be a big help to you. http://hometown.aol.com/bigdean62/index.html
Big Dean
           Getting the main shift lever unstuck
      Pull your filler plug for the transmission look inside you will see a big gear. Find a level spot shut off the tractor. Push the clutch down & put the high low shifter in neutral to relieve any pressure that might be on the gears. With a long screwdriver or a small pry bar pry the big gear forward if it is hung in reverse. Pry it back if it is hung in first gear. If you happen to go to far it will go in the other gear. You need to get it in the center. You should be able to feel the detent balls pop in the grooves in the shift rail as you move the gear. Through the years I have probably unstuck at least a 1000 of them this way. It is a common problem on the Massey tractors after they get a little wear on them