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Discussion Starter #1
We have an 9400 JD combine, 1990 with 3000 hours on it, and while doing wheat today, just stopped moving? Anyone else have similar problem? doesnt seem to be electrical? could it be the transmission with this many hours on the unit?
 

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their is heaps of things that could have gone wrong. first thing i would check is the hydro cable. they wear and can break.
 

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Discussion Starter #4
it acts like it wants to go, but just makes some noise and doesnt move, all couplers are good, thinking its likely in the transmission case
 

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Discussion Starter #6
Update

We tore apart the gear box and found the main shaft was warn along with its coupler, so now we wait for the parts to arrive Wednesday morning. A nice weekend lost, hopefully the rain stays away to finish the wheat when we get it back together
 
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what I would do is only replace the coupler thats between the transmission and the hydrostat. This thing is easy and fast to fix. Taking out the shaft in the transmission will take you some time, which could be valuable during harvest.
Put the new coupler on their and see if it would run. We had the same problem we just fixed the coupler and did the shaft in the transmission in winter.
good luck with repairing and harvest
 
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