U-1 power unit-s

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Re: U-1 power unit-s

Postby Super A » Fri May 03, 2013 9:53 am

John *.?-!.* cub owner wrote:didn't the ones for the 52R combine have a second groove on the crankshaft pulley? I read someplace that it drove the unloader auger.


Not on the 52R, can't speak for the early 64's that replaced the 52R. The unloading auger, if it had one, was driven off the rear of the combine's main gearbox.

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Re: U-1 power unit-s

Postby jim turner » Fri May 03, 2013 10:43 am

John, you are absolutely correct.
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Re: U-1 power unit-s

Postby Super A » Fri May 03, 2013 11:15 am

jim turner wrote:John, you are absolutely correct.


As far as I can tell there's no difference in the crankshaft pulley between the combine engine and the regular tractor engine.

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Re: U-1 power unit-s

Postby John *.?-!.* cub owner » Fri May 03, 2013 9:20 pm

The reason I mentioned it is that when I discovered the loader cub had a broken engine ear, Bill replaced it with a power unit engine, but it had a crankshaft pulley with 2 grooves. When I mentioned it on another forum I was told that the second groove ran the unloader on a combine. don't remember if he said 52R, or a different model. When Bill brought me the engine he told me he wanted that pulley back, so I later removed it and returned it to him.
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Re: U-1 power unit-s

Postby Super A » Fri May 03, 2013 10:24 pm

John *.?-!.* cub owner wrote:The reason I mentioned it is that when I discovered the loader cub had a broken engine ear, Bill replaced it with a power unit engine, but it had a crankshaft pulley with 2 grooves. When I mentioned it on another forum I was told that the second groove ran the unloader on a combine. don't remember if he said 52R, or a different model. When Bill brought me the engine he told me he wanted that pulley back, so I later removed it and returned it to him.


Might've been a 64. The engine was turned cross-ways on them. It is definatley not a 52R. Everything drives from the reduction gear on the rear of the power unit.

EDIT: after thinking about it, IIRC everything ran off the clutch end of the 64 combine. That double groove pulley must've been for something else.

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Re: U-1 power unit-s

Postby jim turner » Sat May 04, 2013 8:25 am

don't know the model of combine but I have two c60 combine engines that have the double sheave pulley

One was built in 1952
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Re: U-1 power unit-s

Postby John *.?-!.* cub owner » Sat May 04, 2013 8:41 am

When I get down to the shed a little later today I will get the engine serial number, maybe Jim Becker or someone else will have info as to what it was used on.
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Re: U-1 power unit-s

Postby Former Member » Sat May 04, 2013 10:02 am

If I can dodge the raindrops, I will try to get better pics of the #s
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Re: U-1 power unit-s

Postby John *.?-!.* cub owner » Sat May 04, 2013 11:46 am

Serial number on my engine is IMCUBM 16443. I was wondering if the 2nd groove on the pulley may have been determined by whether the combine was equipped with a sacker versus a bulk bin rather than year or model.
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Re: U-1 power unit-s

Postby Super A » Sat May 04, 2013 6:01 pm

The number we need would have been on the power unit itself. Jim, if one was built in '52 that would be right for a #64 combine, but I still don't think the double sheave would have driven the unloader.

I used to have a #64 manual but who knows where it is.....

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Re: U-1 power unit-s

Postby Former Member » Tue May 07, 2013 10:03 pm

OK, I got all the #s off my power unit.

S# 52HT 2523
Engine S# IMCUBM 9367
Date code 1/30/T
Block Part # 251341 R2 L
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Re: U-1 power unit-s

Postby ad356 » Tue May 07, 2013 11:15 pm

excuse my igonorance but what were these used for in the first place. i know it looks like it has a C60 engine but beyond that i know nothing about thsee. educate me
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Re: U-1 power unit-s

Postby Barnyard » Tue May 07, 2013 11:33 pm

ad356 wrote:excuse my igonorance but what were these used for in the first place. i know it looks like it has a C60 engine but beyond that i know nothing about thsee. educate me

Various models were used on pull behind combines, hay balers etc. They were also used as stand alone engines for bus saws, hammer mills and so on.
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Re: U-1 power unit-s

Postby Super A » Wed May 08, 2013 5:39 am

Dale Shaw wrote:OK, I got all the #s off my power unit.

S# 52HT 2523
Engine S# IMCUBM 9367
Date code 1/30/T
Block Part # 251341 R2 L


The 52HT means it came from a 52R harvester-thresher (combine).

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