Dearborn 14-51 Side mounted sickle mower

[Chrisdavis]

Need to find a replacement for this split sleeve 6 splines are worn 1 1/8 in shaft. I can’t find a part number or anyone who can find one. Any leads about finding a replacement?

 

[casecollectorsc]

I wonder if you call McMaster-Carr and talk to someone and send the pictures. I have had good results doing that.

 

[Chrisdavis]

I wonder if you call McMaster-Carr and talk to someone and send the pictures. I have had good results doing that.

Thanks- I did send the pics to Messicks but I’ll try McMaster-Carr too

 

[matthies]

Try Baum Hydraulics in Omaha Nebraska.

 

[Chrisdavis]

Try Baum Hydraulics in Omaha Nebraska.

Thanks

 

[CraigWis]

It looks like The part number is 140302 when using the 1 1/8 in my parts manual
My scanner went down so I can't send you a scan
Maybe hard to get parts for a 14-51 mower made from 1952-1954
If you look in YT Marketplace Classified Ad's I have Parts and Operators Manuals for the Mower for sale

 

[Chrisdavis]

It looks like The part number is 140302 when using the 1 1/8 in my parts manual
My scanner went down so I can't send you a scan
Maybe hard to get parts for a 14-51 mower made from 1952-1954
If you look in YT Marketplace Classified Ad's I have Parts and Operators Manuals for the Mower for sale

I downloaded a parts manual and came up with the same part#. New Holland has almost all the parts available EXCEPT the one I need. Going to look at an 8N tonight with the same mower attached. Hate to buy a whole tractor for one part but at this point it may be worth it for the extra parts.

 

[CraigWis]

That part is Different if you are using the larger PTO shaft on the Tractor

 

[Chrisdavis]

1 1/8 6 spline shaft. Do must folks covert that to the 1 3/8?

 

[DanielW]

The taper and starting diameter of that bushing (sleeve) will almost certainly be a standard QD taper bushing, bored for a 6-spline pto. Unfortunately that bushing you have looks like what you'd call a 'Type 2' taper bushing (long), which aren't too common in QD bushings. But since the splines are only a small part of the bore length, the rest isn't really doing much for you. There's a chance you can keep the sheave and just by a minimum-plain-bore QD bushing the right size (will have to measure to know what series), then have a local machine shop bore the bushing for the 6-spline pattern. The machine shop I go to even has both the 1-3/8" six-spline pattern already in their CNC program as a standard because it's such a popular machine pattern (especially for them, as they do a lot of farm work), so they can tool it up very quickly and easily. Unforunately the 1-1/8" isn't as popular, so they may have to find the dimensions for it and program their code accordingly.

There might be a slight chance Dearborn had their own tapers, in which case you just have to do the same thing with a standard QD bushing and machine shop, but you'd just need to buy a standard sheave with a QD bore to suit. You'd just have to measure sheave diameter and get the equivalent standard sheave from somewhere like Martin Sprocket or Browning.

If it were mine, I'd convert the tractor with a standard 1-3/8" shaft. It's an easy swap on an N and makes it a much more usable tractor. I just did another on a 2N, using a shaft I got from amazon for $120. Worked great, and is an easy 15-minute job. If you do that, you could then just get a new sheave bored for an H-series QD bushing because Browning (and others) already make an H-size QD bushing with a 1-3/8", 6-spline PTO bore. See link below. Measure the sheave OD and tell us what belt cross section is on there (looks like a double C-section setup, but hard to tell from that picture) and we can spec a new sheave and bushing for you. I would think the whole kit/caboodle would only cost $200 to $300 total.

Or, measure the OD accurately (with a vernier) at the start and end of the taper, then tell us the length of the taper between those points, and we can tell you if it's a standard QD bushing size and spec a bushing you could buy quite cheap and take to a machine shop and get bore for the 1-1/8" pattern.

Depending on how much meat there is on that existing bushing, the quickest/cheapest/easiest fix might be to convert the tractor to a 1-3/8" shaft, then have your old bushing re-bored for a standard 1-3/8" pattern. The taper would probably have to be cut a little shorter as there's not much meat on the narrow end, but that narrow end isn't doing anything for you anyway. That way you can use the existing bushing and sheave, and have a standard 1-3/8" PTO that's a lot more convenient to use with all other PTO equipment. Try and find a machine shop that has CNC equipment, but that also services a farming area. That way they'll almost certainly have the CNC code and dimensions already programmed for a standard 1-3/8" PTO. Although I'm a fan of the old-school machine shops, this is the kind of thing that a new CNC mill could blast out in a few minutes, whereas an old-school machine shop with manual mills/shapers/lathes would take several hours, and cost accordingly.

1 - 3/8" Bushing with 6-Spline Bore

www.chemicalcontainers.com

 

[Chrisdavis]

I was able to locate NOS at Messicks but the taper isn’t quite right. We’re taking it to a machine shop to have it worked to match the original bushing. Also going to have them rework the splines on the original for a backup. Thanks everyone for your help!