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Discussion Starter #1
Hello, I am new and have been repairing a case/ingersoll 226 hydriv. I have the engine running nicely after trying to repair fuel pump (integrated into carburetor, did not seem to respond to rebuild) and then switching in an electric fuel pump with low pressure.

Question: now I have realized that one whole transmission side is not turning. completely frozen left wheel, really does not move one mm. So there is enough power (and presumably hydraulic motor running OK) to pull the whole tractor across grass, leaving a big mess) based on the R side wheel, when this does not spin because not enough traction. Any ideas or common things that go wrong? This seems like such a tough transmission that it is hard to imagine it getting so messed up, since previous owner said it just stopped.

I am imagining that if I open it up I will see some sort of mess in the differential, I have also heard of gear bolts shearing on other ingersoll models, but I think that would disable both sides,and only affect one gear e.g. H or L, no?

Also, it looks like with pulling off the seat, gas tank and wheel guards it is pretty easy to get at the transmission just be removing a top cover, is that right or do I need to get ready for a more painful process (at least just to scope it out)?

I see that there are transmissions on ebay in good shape for $200 (for similar models, hopefully that is ok) so that also gives some hope if there is a total mess.

Thanks so much for your help!!
 

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Discussion Starter #3
ok, thanks! transaxle housing, are you referring to the overall outer case (orange painted on outside) or a housing interior to the transaxle that sits inside? I will look inside and look for the differential bolts on the service manual diagram.....
 

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Discussion Starter #4
2458202
that's the differential if it is showing up on the post, would differential bolts be somewhere in that area? Nothing in that area is referenced as a bolt...
 

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Yes it could be broken differential bolts jammed in a gear. They are not in that picture but bolt #27 together. I replaced mine as preventive maintenance. I got them from Fastenal at a reasonable price (grade 8 nuts and bolts)
 

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Discussion Starter #7
I'll wait to see what I find, but it also makes sense since it looks like the power from the hydraulic motor shaft goes first to the right wheel and then the L follows via the differential - so a snag on the L wheel would still allow the R to be driven, right - kind of like having a cinder block chocking the L wheel except the block is inside the transaxle :(
 

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The Hydraulic motor drives an intermediate sliding gear. Which is what makes HI - Low shifting possible. You can't see the hydraulic motor shaft or the low speed drive gear in this picture, they're below the oil level:
2458238


The differential 'carrier' is in the bottom center and those 4 bolts hold both of the final drive gears and the carrier all together as one unit. So NO the motor does not drive one side or the other it drives the differential that in turn drives the axle shafts.. The ends of the axle shafts are those small narrow looking 'gears' in the center of the differential carrier.

Best course of action is to drop the rear end, there are only like 6 bolts that hold it on and with a parts manual from the Case - ingersoll site tear it down and see whats up. Then get alhold of for any parts you need.
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all of the tractors 200, 400. 600. 3000. 4000, 6000 use the same rear end differential and gears. the only differences are in the drive motors and whether the axle shafts are 5 bolt or 6 bolt.
 

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As was said, it does kinda sound like one or more of those bolts might be broken. Not a monster deal really to check. Make sure you check the case good if something is broke. There is not a lot of space in there so if a bolt snaps off it wedges its self between the steel of the gears and the softer iron case.
 

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Discussion Starter #10
Great, thanks everyone for your really detailed responses and ideas. Now I just need the nerve and the time....
 
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