Neat old photo but what is it?

I was looking at some old photos somewhere on the internet and came upon this one. It's from my hometown or somewhere near there. What the heck is that thing belted up to the tractor? It looks almost like a potato digger but I highly doubt that. The caption only said "Some men working with a tractor near New Florence, PA." or something along those lines.
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Yup, an old rock crusher, they must have been fun to use, I've seen them at some of the old tractor shows, glad I didn't have to operate one, amazing to watch though.
 
Behind the crusher and elevator is a wagon which runs the rock through rotary screens and empties the rock into various bins for different sizes of crushed rock.
 
Sure looks like an OSHA approved belt with only half of it there ? LOL.

Might be a fine line at the top ? Maybe the camera angle matched up perfectly hiding it ?
 

I googled "vintage rock crusher" and found it. It is a JI case unit. The actual crusher is the part close to the ground that the steamer is belted to. The belt carries crushed material up to the trommel screen that you can see the round end of. Screens with shakers would do the rest. It appears that it would have had about a ten inch jaw limit. which would have made manual loading feasible.
 
the belt is completly there and visible if you look close at it, just think these men at that time had the latest high tech way to make gravel, even though it was labor intensive and production was slow compared to todays crushers , it beat the heck out of a wheelbarrow and sledge hammer
 
I'm wondering how they got that team of horses to stay put? It must have taken a lot of training to tolerate the noise that crusher would make. Noise or unexpected movement within their site range could easily cause a team to take off running at full gallop.
 
I spent plenty of time on a crusher when younger. Crusher operator, changed jaws, changed screens. Luckily it was belt fed. I used to walk the high belts to grease the rollers, many wouldn't because they didn't like heights.
 
(quoted from post at 07:09:55 08/03/16) I spent plenty of time on a crusher when younger. Crusher operator, changed jaws, changed screens. Luckily it was belt fed. I used to walk the high belts to grease the rollers, many wouldn't because they didn't like heights.

I think that it is normal to be uncomfortable with heights. It is just a matter of wanting or needing badly enough to do it.
 

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