IH 656 Hydro pto, hydraulic and movement problem

shade2 · Aug 15, 2012

656 Hydro will run, but has no movement. We were cutting hay and the disc mower's safety pin came loss causing the disc mower to come up and hit the tractor. The pto and hydraulics do not work. No movement at all! Tried to drive the tractor to the trailer, but no movement from the tractor either. It still runs like a top, but put it in gear and nothing happens. Heard it might be the flex plate?? We were also told it could be the transmission........mechanic said 5K to fix the transmission.....so not worth it, if that is the case. Any information is appreciated! Thank you

charlieu · Aug 15, 2012

If the tractor will not move and the PTO and auxilary hydraulics will not work I would say that it's the flex plate, or the spline shaft that goes into the flexplate. I'm attaching a couple pictures of a 656 Hydro that I had to remove and send to a hydro shop for repair last winter. The Hydro repair shop from Sioux City, Iowa only charged $2800 to repair the unit for me. You will not know what the shaft and splines in the flexplate looks like until you have split the tractor. Good Luck charlie

pete 23 · Aug 15, 2012

I never had one fail that did not ruin the shaft along with the splines in flex plate, not that you could not be lucky and just strip out or break the flex plate. Later model tractors went to a spring cushioned plate like the regular clutch tractors have. Problem is you need a different flywheel or a very good machinist to convert to that. Low hour failures were counted off as a misalignment problem between engine and transmission. High hours, just wear and tear. If you could get the hydro repaired for $2800 I would say that is a very reasonable figure.

shade2 · Aug 15, 2012

Thanks for the post! The only thing we are concerned with, the "mechanic" told us over the phone, that if we rolled/pulled it, then we probably destoryed the transmission. When we pulled it a whole 20 ft, we heard it make some kind of noise, but not sure what it was. It still starts and runs great. When we bought the tractor, we were told where "neutral" was, but according to the "Mechanic" we were wrong. Neutral is apparently when you shift your high/low to the center, not your shifter on the left side. We thought we had it in neutral when we pulled it away from the disc mower, but he said we didn't. I don't know. I hope it is a shaft and flex plate......not a transmission issue.

pete 23 · Aug 15, 2012

You may have destroyed the hydostatic motor by pulling it with range trans in gear so you may have double problems now. You will have to remove bottom plate or top cover(which is not easy) of hydrostatic unit to see any damage to motor, and split tractor to tell anything about flex plate and shaft. Maybe with a bore scope you could get a look at splined shaft and flex plate but hard to see much through that little hole with naked eye.

Anonymous-0 · Aug 16, 2012

Oh

Could have been something simple like a roll pin in the High low Shifter or an O-Ring.

Check the shifter linkage on the High/low where it goes into the trans to see if you have a missing roll pin.

Oil level ok?

Next to a guy who knows how to fix it.

Possibly an O-ring in one of the controls - if not then on to the rebuild.

I'm trying to be hopeful it's something simple

Good luck

IH 656 Hydro pto, hydraulic and movement problem

shade2

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charlieu

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pete 23

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shade2

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pete 23

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Anonymous-0

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