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Massey Ferguson 135 hard to shift

R

RUNKELDC

Member
I have a 1967 Massey Ferguson 135 gas burner that at times is nearly impossible to shift without idling down until it nearly stalls. Most of the time (75%) it shifts smooth as silk at any rpm. It doesn't seem to matter if the tractor is hot or cold. I've also noticed that many times the gears don't seem to fully disengage when the clutch is fully depressed. With the tractor in neutral, the gears grind when trying to shift into first or reverse. The gears don't seem to be slowing because I can give it 10-15 seconds or more and the grinding is just as bad. Same as above, I can only shift if the tractor nearly stalls. Anyone know what is going on here?
 
Any oil dripping out the bottom? Sounds like the clutch might be wet. Pop the inspection cover off and do the adjustment for the pto clutch and check for leaks while you are there.
I am assuming it's the basic 6 speed dual clutch model, correct?
 
Thanks for the reply. No oil dripping. It is a basic 6 speed dual clutch model. I'm not familiar with how to adjust the pto clutch, but will do some research.
 
Ok do the adjustment and see where you stand. Another possible option is a shift fork may have broken on ya.
 

Okay, I do have transmission fluid coming out of the weep hole. I hadn't looked that closely before as I have an engine oil leak. There is a spot about the size of a quarter after sitting for two days. What's the fix for this?
 

Just read up on fixing the leak. Sounds like a big job. I might just run the tractor the way it is until it has to be fixed.
 
Not an expensive job by any means but an time consuming one yes. PTO shaft has to slide out the back far enough for the front gear to drop down so you can pull the input assembly out to replace the seals. So you have to either pull the hydraulic pump out or separate the trans from the diff housing to get enough room. Of course you also have to pull the engine off the front too so you'll end up with 3 pieces. Once the trans is out, or hydraulic pump out if you go that way, replacing the seals is maybe an hour job. Clutch is probably soaked too...
 
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