Cub Mower Identification needed

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Cub Mower Identification needed

Postby Papa's Cub » Thu Jul 11, 2013 10:19 pm

I saw a mower for sale with a fast hitch setup. It rides in the rear and the mower is driven by a drive shaft that hooks directly to the PTO shaft. It's not a finish mower...more like a bush hog. I believe it had a couple of wheels mounted on the back of it. It's been painted so I can't tell the original color. It appears to be in great shape. Hope I've given enough information for someone to Identify it and give it an approximate value. Thanks, Papa.
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Re: Cub Mower Identification needed

Postby Rudi » Thu Jul 11, 2013 10:27 pm

Probably an IH Danco C-2 Rotary Mower 10-27-67

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or similar. Does it look like the one above?

Fast hitch version probably $350.00 to $500.00 thereabouts depending on condition, location, availability and of course what the PO's want. That be the Present Owner and the Prospective Owner.
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Re: Cub Mower Identification needed

Postby Bob McCarty » Thu Jul 11, 2013 10:30 pm

Or Woods:
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Same value range, depending on location and condition.

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Re: Cub Mower Identification needed

Postby Buzzard Wing » Fri Jul 12, 2013 8:23 am

Probably the most common fast hitch mower is a Woods 42F
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Re: Cub Mower Identification needed

Postby Dale Finch » Fri Jul 12, 2013 3:53 pm

If it turns out to be a Woods 42F and you don't buy it, ask the guy who is selling it if he would sell just the PTO drive shaft!! :lol:
I am STILL hoping to find one for my mower!!
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Re: Cub Mower Identification needed

Postby Matt Kirsch » Fri Jul 12, 2013 4:31 pm

Ohhhhhhhh,I am in a moral quandry here. I've been keeping a secret.

I have a PTO shaft that I got from SurplusCenter several years ago. It has the correct splines for a Cub PTO shaft.

The problem is, it has a ball detent rather than a cross-pin. The yoke would have to be drilled for the cross pin.

Can someone provide me with the open and closed length of one of those PTO shafts?
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Re: Cub Mower Identification needed

Postby Buzzard Wing » Fri Jul 12, 2013 5:42 pm

I have the answer Matt.... 'depends'. I have 3 different types of mowers and I am pretty sure they are all different. Even between a Cub and Lo Boy they are different (at least the C-2 is). Seems they only have a short section that match the male end, the rest is just 'tube' to the . Some are splined, most are ALMOST square.
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Re: Cub Mower Identification needed

Postby Bill Hudson » Fri Jul 12, 2013 6:03 pm

Buzzard Wing wrote:... most are ALMOST square.


For an excellent reason, to prevent lining up the universal joint out-of-phase. If the U-joint is 90 degrees out-of-phase, the results are not pretty, but the repairs are pretty ... expensive.

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Re: Cub Mower Identification needed

Postby Redclip » Fri Jul 12, 2013 7:27 pm

Bill, can you explain what is meant by "universal joint out-of-phase" ?
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Re: Cub Mower Identification needed

Postby tst » Fri Jul 12, 2013 7:36 pm

the u joints need to be indexed, make sure both u joints have the caps aligned against each other or they tear things up
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Re: Cub Mower Identification needed

Postby Bill Hudson » Fri Jul 12, 2013 7:49 pm

Redclip wrote:Bill, can you explain what is meant by "universal joint out-of-phase" ?


I'll do my best.

Lets start with the fact that U joints are designed to operate in less that a straight line by flexing at each end of the shaft. Thus the knuckle (mounted on each end of the shaft) must be in the same plain in order to flex smoothly with little vibration. This is why most, but not all, of these shafts are designed somewhat rectangular, they only go together two ways, both of which are in-phase. A square shaft, and in rare cases a uniformly splined shaft can be joined out-of-phase and cause the shaft to pound a lot whenever the U-joints are flexed. As a young lad, I learned this the hard way. Needless to say that Dad was more than a bit displeased when I presented him with the broken U-joints.

I hope this helps. I know what I'm trying to say, however, it may be less than clear to others. So, ask questions if you don't understand what I said.

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Re: Cub Mower Identification needed

Postby Jim Becker » Fri Jul 12, 2013 8:32 pm

Here is a chart from wikipedia that shows the difference in speed between the input and output shafts of a u-joint at various operating angles. If the output from a universal joint is used to drive another u-joint and they are oriented the same way, the uneven speed will be multiplied. If they are oriented 90 degrees apart, the univen speeds will cancel each other and the output of the second will be at a uniform speed.
There are alternative designs of universal joints that don't act this way. They are called "constant velocity" joints, abbreviated "CV-joints". Common usage is in front wheel drive axle shafts.
More than you want to read about it here:
http://en.wikipedia.org/wiki/CV_joint

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Re: Cub Mower Identification needed

Postby Smokeycub » Sat Jul 13, 2013 7:47 am

This I understand.
Bill Hudson wrote:
Buzzard Wing wrote:... most are ALMOST square.


For an excellent reason, to prevent lining up the universal joint out-of-phase. If the U-joint is 90 degrees out-of-phase, the results are not pretty, but the repairs are pretty ... expensive.

Bill



This confuses me.
Jim Becker wrote:Here is a chart from wikipedia that shows the difference in speed between the input and output shafts of a u-joint at various operating angles. If the output from a universal joint is used to drive another u-joint and they are oriented the same way, the uneven speed will be multiplied. If they are oriented 90 degrees apart, the univen speeds will cancel each other and the output of the second will be at a uniform speed.


Jims chart (if I'm reading it right) shows the speed of the ends of a driven shaft can vary, by quite a lot. I can't visualize this. I can see how an out of phase shaft will have excessive stress. How can it have as much as 2X variation? I read the link and it didn't clarify my question. At the risk of sounding dumb (I'm usually pretty good at grasping most concepts) I gotta ask ...Is that saying one end of the shaft is actually turning faster than the other? ...or is it equating speed with stress and showing stress in the chart? What am I missing? :help:
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Re: Cub Mower Identification needed

Postby Matt Kirsch » Sat Jul 13, 2013 8:40 am

For each revolution at the input, there has to be one revolution of the output. Otherwise the shaft would look like a twizzler after a little while.

If you connect the ends of the graph, you'll notice that they start and end at the same point.

The speed varies during the rotation. It slows down and speeds up as it turns.
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Re: Cub Mower Identification needed

Postby Smokeycub » Sat Jul 13, 2013 9:21 am

Agreed.
Matt Kirsch wrote:For each revolution at the input, there has to be one revolution of the output

Isn't this simply stress on the shaft. While it may want to go slower/faster I don't see how it could.
Matt Kirsch wrote:The speed varies during the rotation. It slows down and speeds up as it turns

Again I must be missing something. Mechanically, I can't see how it can change it's speed, even within one revolution.
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