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Antique Farm Tractors Vintage farm tractors on rubber tires with various implements. Ford, John Deere, Oliver, McCormick and more.

Antique Farm Tractors

7050 Allis question

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Old 08-27-2019, 11:22:45 AM
Avery22x36 Avery22x36 is offline
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Default 7050 Allis question

I am wanting to restore my dad's old Allis and its mechanically in pretty good shape other than this one problem. Its a maroon belly with the 5 speed, power director and hi-low set up. It has developed a problem when you let out on the clutch at an idle, it has a soft mushy take off like something is slipping. If you give it throttle at about 1800 it straightens out and runs fine with no issues at all. In the field, if you throttle back at the end to turn around, it does the same hesitation like its out of fluid but its not, I drained and changed the filter and looked for the obvious problems. Also, there are no sounds or smells or anything else out of the ordinary, Any help would be much appreciated. It never sat for very long as I always used it for a blade and cherry picker on the back. I would first notice it when I would put it in road gear and the higher gears are always worse for hesitation. Thanks for any ideas
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Old 09-29-2019, 10:48:27 AM
cmayer cmayer is offline
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Default Re: 7050 Allis question

You've got a couple options...first, would be the power director valve is getting 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.

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