Mf1230 issues

[zuesandsadie]

I am having trouble with my massey. It will start and run great but after good and hot, the hydrostatic will not move forward. Can back up. Starts getting slower in midrange, shift to low and in 15 minutes or so won't go up slightest hill. Engine never slows or stalls, but pedal tries to push back against your foot and will make a noise sounds like hydraulic cavitation. Changed all fluids and filters twice, including screens. Still doing it. Could this be pressure relief valve?

 

[Phillip w]

Welcome to the forum. I am in way over my head on this situation. However, will it go backwards??? You might check the pedal all around it, underneath and what not to see if you got a hunk of dirt hang up/holding up the peddle. Other than that, I'm in over my head. Perhaps talk to your dealer service department and see if you can get some ideas.

 

[zuesandsadie]

Nothing blocking pedal, works great until gets hot. Thought maybe heat on pressure relief valve spring plus thinner fluids when hot might make it do this but don't want to dump bunch of money into it unless I have an idea what issues are first. Local dealer went out of business so that doesn't help. Closest dealer is almost 100 miles and won't talk unless they see the tractor.

 

[cford36]

I'm also no expert here, but sounds like something within the HST system. Since you say the pedal "pushes" back or I'm thinking seems very stiff, this happens with mine if I'm in too high a gear going up a hill, gets more difficult to push. Obviously shouldn't happen in low gear. I don't think your going to have much of an option other than taking it to a dealer, if under warranty something your going to want them to take care of. Good luck.