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Tractorholic
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626 Posts
Discussion Starter · #1 ·
I'm restoring a 1650 Massey, on disassembly I noticed the input shaft and coupler were not what I expected. I thought I would see a splined output shaft and corresponding yoke, but it appears that it's a smooth shaft with a hole drilled through it, and a smooth bore yoke on the u joint. I question it's originality since every one I've seen prior was splined, and it appears as if the end of the shaft was cut with a hack saw. So is actually original or has it been repaired at some time? It seemed to work fine when it was together so I'm probably not going to change it. It is missing a fan on the driveshaft which I'm assuming should be there. The shaft itself does seem to have a bit of play in it, and is seeping a bit of oil, I'm not sure how involved repairing that would be, if it's just a matter of pulling the end piece off the hydro and replacing the bearing and seal or what?

It's an Eaton 1100-025 hydro, there is another one on eBay right now that does have a splined shaft.

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Red Tractor Nut & Diesel Addict
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32,399 Posts
All the Massey units I've seen, whether Eaton or Sundstrand had spline shafts. This Eaton unit may have come from another make tractor, as many used the same pump, just with different input shafts. The Unico 15 I used to have had a 3/4" input shaft with woodruff keyway. I can't explain the cut marks though.
 

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Tractorholic
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626 Posts
Discussion Starter · #3 ·
Yeah it's certainly odd, I've seen a few of the keyed shafts on other models just cruising eBay. No evidence of there ever being a key way in it, and the end is still puzzling.

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New Member
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74 Posts
I have 2 of MF 1650'S both having Eaton hydraulic units. 1 has the standard spline shaft, the other has a keyed shaft. Both units have input shaft bronze bearings.The keyed shaft is the new replacement input shaft for the Eaton series. The spline shaft is nor longer available.

Easy to change.
 
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