Re: 7050 Allis question
You've got a couple options...first, would be the power director valve is getting sticky...how do the two buttons on the floor shift? Snappy, or kind of mushy like the clutch?
That is most likely the case, and not a big deal to repair. The seal kit for that valve is about $200 and anyone with some mechanical skill can do it.
The second option, and more costly would be a slipping Torque Limiter...basically, the clutch disc on the flywheel that acts as a fuse or dampener for the drivetrain. If it's slipping, you have to split the tractor like you would put a clutch in anything else.
To see which one it is for sure, rev it up to 1500RPM, and see if you can stop it with the brakes...if you can, try to turn the steering wheel and see if it steers. If it steers, then your Power Director is slipping...if it doesn't, then it's the Torque Limiter.
If it doesn't stop, then both are OK, and you just need to rebuild and adjust the Power Director Valve.