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560 vs 660 differential housings


 
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BigART
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PostPosted: Thu Aug 30, 2007 7:01 am    Post subject: 560 vs 660 differential housings Reply to specific post Reply with quote

Has anyone compared the bare differential cases of the 560 versus 660??? Was wondering if the 660 was any thicker in the spur gear cage areas? Are the boxes the same in terms of width, length and depth? Thanks for any assistance, Art Wooden
 
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ejr-IA.
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PostPosted: Thu Aug 30, 2007 8:02 am    Post subject: Re: 560 vs 660 differential housings Reply to specific post Reply with quote

Looked the part numbers up and their the same.Diference is in the planetary out board drive axel.
 
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Wardner
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Joined: 14 Dec 1999
Posts: 5376
Location: Tewksbury, MA 01876

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PostPosted: Thu Aug 30, 2007 2:09 pm    Post subject: Re: 560 vs 660 differential housings Reply to specific post Reply with quote

Photo Sharing and Video Hosting at Photobucket

I took this picture the other day as I got a flat and used the opportunity to put one of my wheel weights on the inside. Not looking forward to doing the other side

The International 560 and 660 differences are few. The 660 radiator is three inches higher and that affects the "dog legs". Extension are spot welded to the bottom of the 560 legs. The fan moves up to 6 blades from 5. A cast iron spacer is fitted below the front of the grill. From the axle housings to the rear tires, everything is different. I have just listed all the differences with the exception of the badges.

The engines are identical and that includes the pump and injectors. The 660 is adjusted for 600 more rpm.
 
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BigART
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PostPosted: Thu Aug 30, 2007 5:06 pm    Post subject: Re: 560 vs 660 differential housings Reply to specific post Reply with quote

I'm beginning to think current on-line part nos. are generic (373021R1) , which is not the numbers cast on the two 560 housing I look at on 560's in salvage yards in Missouri and Ohio this week!!!--numbers ending like 355R2?? Thanks for the input--and photo, BigART
 
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ejr-IA.
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PostPosted: Thu Aug 30, 2007 5:35 pm    Post subject: Re: 560 vs 660 differential housings Reply to specific post Reply with quote

The case no. I found is 372653R94 560&660
 
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KIP in MX
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Joined: 20 May 2005
Posts: 880
Location: Trinidad, W.I.and Missouri

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PostPosted: Thu Aug 30, 2007 6:04 pm    Post subject: Re: 560 vs 660 differential housings Reply to specific post Reply with quote

Wardner,

Are you saying that those 660 axle housings, axles and planetaries will bolt up to a 560 transmission housing? That would be interesting.
 
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Wardner
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Joined: 14 Dec 1999
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Location: Tewksbury, MA 01876

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PostPosted: Thu Aug 30, 2007 7:20 pm    Post subject: Re: 560 vs 660 differential housings Reply to specific post Reply with quote

Not only will they bolt up to a 560, they will bolt up to a M and later same sized tractors.

Lets assume that you have a M-SM and you want to go slow, real slow. You could put in the M-SM low-low first gear kit, one of the 560-660 differential sets (I forget which one and I not going to look it up unless requested), and the planetary axle. The 660 also had an optional tire size that may give a further reduction.

You could also modify a SMTA w/TA and later tractors (low-low kit is not available) for a substantial reduction. In that case you would use the F560 first gear.

I am not up to pouring thru the parts books and doing the math at this moment. I will say that I built a SMTA with F560 differential gears, F560 first gear, good TA, and 15.5x38 tires. It's a creeper in first gear low range. Top governed speed in direct is 11 mph.
 
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KIP in MX
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Location: Trinidad, W.I.and Missouri

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PostPosted: Fri Aug 31, 2007 7:01 am    Post subject: Re: 560 vs 660 differential housings Reply to specific post Reply with quote

Thanks! Learn something every day on this site.
 
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BigART
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PostPosted: Fri Aug 31, 2007 10:49 pm    Post subject: Re: 560 vs 660 differential housings Reply to specific post Reply with quote

Spoke to a puller with three 460/560 units, stated the current numbers listed in the parts book are updated versions and do fit all models, just the castings were given the updated numbers when the upgrades came out and replaced all prior numbers, which they replaced. Thanks for all the input.
 
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