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Farmall & IHC Tractors Discussion Forum
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Early 560's what was the rear end problem?

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Ronald

01-26-2006 19:11:36




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I'm am getting the rear end of my 1958 560 back together finally, and I read somewhere that when the 560's first came out they were having rear end failures. What exactly was the weak point and what did they do to fix it? I was just wondering if mine had been updated or if I need to do something befoe I put the top on.

Thanks Ronald




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gab

01-27-2006 17:37:29




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 Re: Early 560's what was the rear end problem? in reply to Ronald, 01-26-2006 19:11:36  
I found my serv. bulletin #s-9957 Dec.21,1959. It's eight pages and states revised diff. bevel gears, heavier diff. case,tapered bearings,bull pinion,brake shaft, cage & brg. displacing parts prev, specified .Also improved bull gear profile, pinion teeth & side gear teeth to improve lubrication. New bull gears and pinions with 25 degree teeth replacing 20 deg. teeth. There's a bunch of part no. here but no axle brgs. It says to remove and clean axle brgs so this is probably one of the first in a series serv bulletins. This came in about a foot tall stack of blue ribbon serv manuals I bought at an auction for 9 bucks, some don't look like they were ever opened. Jim

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Dave Slater

01-27-2006 15:31:56




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 Re: Early 560's what was the rear end problem? in reply to Ronald, 01-26-2006 19:11:36  
When they finished making changes to later tractors they ended up with differential carrier and support bearings change,bull pinion shafts,bearings and cage change,bull gears changed
,axle bearings changed, and return oil pipe from hydraulics changed to dump more oil in differential ring gear area.May have forgot something.



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Steve in Tex

01-27-2006 11:54:09




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 Re: Early 560's what was the rear end problem? in reply to Ronald, 01-26-2006 19:11:36  
Ronald, An article by Jim Rose in Red Power Magazine, Mar- April 02 detailed the history & solving of rear-end failures of IH 5 speed tractors. The 560 had the most failures because it was the biggest tractor and subjected to much more stress in row crop farming. The final answer to address the problem was changing the inside axle bearings with cylindrical roller type bearings.
For the 560, the bearing no. is Case/IH part #376215R91. My own 560 has this revised bearing, but there is no triangle marked on the serial tag.

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Ronald

01-27-2006 12:16:20




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 Re: Early 560's what was the rear end problem? in reply to Steve in Tex, 01-27-2006 11:54:09  
Is this a simple bearing switch? Or are there other things involved?

Thanks Ronald



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chadd

01-27-2006 08:40:34




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 Re: Early 560's what was the rear end problem? in reply to Ronald, 01-26-2006 19:11:36  
I read in a book that in the beginning, IH didn't even know what was going on. In a frenzy, they revised the differential gears and bull gears. They changed tooth profiles, and created extra paths for oil to lubricate the gears. When they continued to fail, they started revising other parts. When that didn't work, they pushed the panic button and basically gutted the rear end for a complete overhaul. New bearings, gears, shafts, etc. Supposedly though, the real problem was the bearings. Some shops just changed the bearings in the rear end from normal roller bearings to tapered roller bearings, and solved the problem.

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Hugh MacKay

01-27-2006 02:36:52




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 Re: Early 560's what was the rear end problem? in reply to Ronald, 01-26-2006 19:11:36  
Ronald: The triangle KB mentions is your key to knowing whether this was done.



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gab

01-26-2006 19:44:47




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 Re: Early 560's what was the rear end problem? in reply to Ronald, 01-26-2006 19:11:36  
I think I"ve got a service bulletin around here some where that tells all about that. If I can find it tomorrow night, I"ll post back. Jim



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K.B.-826

01-26-2006 19:40:22




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 Re: Early 560's what was the rear end problem? in reply to Ronald, 01-26-2006 19:11:36  
Differential bearings and final drive bearings were the main thing. They were recalled and updated. Most were updated by the dealer, and will have a triangle stamped on the serial number tag.



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Ronald

01-27-2006 07:47:53




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 Re: Early 560's what was the rear end problem? in reply to K.B.-826, 01-26-2006 19:40:22  
I checked my tag and couldn't find a triangle stamped on it but the tag is in such bad shape all you can read is the serial number and the D where 560 D would be so I suppose the triangle could have been there and you wore off by now.
Thanks Ronald



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Nat 2

01-27-2006 05:11:21




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 Re: Early 560's what was the rear end problem? in reply to K.B.-826, 01-26-2006 19:40:22  
K.B.,

We had a 560 when I was a kid. There were a couple of times in its history where it went down with rear end problems, and it was always that a bunch of bolts had been sheared off in the rear end.

As I recall, there were a total of 8, grade 8, 3/8" diameter bolts that needed to be pried out through the shifter hole on top, retrieved through the PTO if you didn't catch them, and replaced. Again, as I recall, Dad said that that was the rear end problem, and the fix was to have the holes machined out to accept 7/16" bolts.

Anybody heard of this?

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Hugh MacKay

01-27-2006 05:45:14




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 Re: Early 560's what was the rear end problem? in reply to Nat 2, 01-27-2006 05:11:21  
Nat: I have no idea what IH did to correct the problem with 560 rear ends. I do know my 560 was one of the last built, thus the problem had been corrected at the factory.

Whatever they did must have been the right fix, as I probably abused my 560 more than any other tractor I owned. I don't like the word abuse, probabley excessively used would be a better term. I needed more HP, dollars dictated I couldn't trade for an 806. An IH technicion cranked it up to 90 HP and I ran it that way farming for 17 years and 11,000 hours. Over the years the IPTO was the weak point, I had to rebuild it every 2 to 3 years. Yes, I know at 11,000 hours it blew up and put a couple of pistons through the block, but it was still cheap horsepower.

That is the only tractor I ever tampered with on HP, the other 15 Farmalls were operated as they came from the factory. Would I do it again, Questionable? The other item one must remember, from my perspective at least, the Farmall 504 gasser was the only one that ever disappointed me.

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AC

01-26-2006 19:14:16




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 Re: Early 560's what was the rear end problem? in reply to Ronald, 01-26-2006 19:11:36  
You will probably never use it hard enough...but, I believe it is in the load capacity of the bearings...AC



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