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Antique Farm Tractors Vintage farm tractors on rubber tires with various implements. Ford, John Deere, Oliver, McCormick and more.

Antique Farm Tractors

10-20 McCormick Main Bearings


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  #1  
Old 01-10-2013, 06:59:06 PM
rhb-3 rhb-3 is offline
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Default 10-20 McCormick Main Bearings

Hi all, I've seen where the rear main bearings in a 10-20 McCormick will last forever, though my '29 has about 1/4" of slop. Surely this is too much, right? Also have seen where it says mine should be grey but I've got what sure looks like factory red. Any thoughts?
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Old 01-10-2013, 07:13:34 PM
Engine Whisperer Engine Whisperer is offline
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Default Re: 10-20 McCormick Main Bearings

Yeah, your mains might be a little loose. If your tractor really is a '29 model chances are really good that it was gray.
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Old 01-10-2013, 07:33:41 PM
rhb-3 rhb-3 is offline
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Default Re: 10-20 McCormick Main Bearings

Unbelievable that it must have run like that. When I pry on the crank the pistons go up and down. The bearing looks ok from the side hole and doesn't seem to have spun. What kind of other damage could I expect to find from that?
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Old 01-11-2013, 11:05:39 AM
CJKlossner CJKlossner is offline
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Default Re: 10-20 McCormick Main Bearings

There should be no other damage from the bearings being worn. The tolerances of the engine allows for a good deal of wear. The only problem could be with the timing gear if it were to get out of square. My uncle has an F-20 that one can pull the fan belt and the crank noticeably moves and he still brush hogs with it. The bearings can be changed in place with a puller. The bearings usually have a tight fit. If you are changing both of them though probably easier to remove the crank and use a press.

Chris
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Old 01-11-2013, 12:38:25 PM
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Default Re: 10-20 McCormick Main Bearings

I have a F-30 with similar issues. Tractor sat for years and the bearing races are severly pitted and loose. I have been putting off replacing them as I'm not sure how to get them out, is there a special puller to do them? It needs both changed. F.J.W.
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Old 01-11-2013, 02:11:07 PM
CJKlossner CJKlossner is offline
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Default Re: 10-20 McCormick Main Bearings

International did make a special puller for removing the shaft and bearings. A large gear puller will do the job with out too much trouble. The bearings are mounted on bolt in retainers and the whole assembly is removed from the flywheel end. The bearings can be pulled or pressed off the shaft and then pressed from the retainers. Here are a couple pictures from the McCormick service manual. The first is pushing the crank from the block. This is usually not all that tight of fit and can also be driven out with a block of wood and hammer. The next image is pulling the bearing from the shaft.

Chris

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Old 01-11-2013, 02:33:57 PM
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Default Re: 10-20 McCormick Main Bearings

I guess the part that is the hardest is getting the flywheel off to get at the bearing. It aparently is pressed on a pretty tight fit. F.J.W.
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Old 01-11-2013, 04:10:20 PM
rhb-3 rhb-3 is offline
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Default Re: 10-20 McCormick Main Bearings

Thanks for the info and pics. I don't imagine there is any way to do some creative engineering for a short term fix. I'm tempted to just slap it back together as everything else looks good. I really only need it to pull it's self in and out of the shed, at least for now. Still puzzles me over the color though. Serial #KC146030 I believe says 1929 but it definitely has red and not farmer red. I have heard that if the dealer got it back later they may have repainted them. Does that sound feasible? Would I be scorned if I painted it red?
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Old 01-11-2013, 08:29:04 PM
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Default Re: 10-20 McCormick Main Bearings

It's your tractor you can paint it any color you like. It was very common for dealers and farmers alike to repaint them the newer color scheme to look less obsolete and easier for the dealer to move them out. In the mid 50s my father bought a new farmall 400 left over stock, it had the newer paint scheme on the show room floor. F.J.W.
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Old 01-11-2013, 09:57:00 PM
FredandCy FredandCy is offline
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Default Re: 10-20 McCormick Main Bearings

Good luck with your project. Nice old 10-20. With regard to the main bearings. They cannot be replaced in the tractor as others have suggested. The crank and bearing assembly must be removed as a unit. You'll need to pull the engine, remove the clutch and flywheel, remove the timing cover, front pulley, etc. and pull the crank from the rear. I've changed them numerous times. That being said, it will run the way it is for a little longer. As for the paint, ALL IH tractors were gray until the model year 1937 came out in November 1936. Any tractor tug as a 1936 or back was originally gray. I've had many 20's 30's, 10-20s and Regulars that you would swear were red. Looking under the hood at the rad tank often doesn't tell you enough. Pull the engine, remove the fenders, look for color under these areas, you'll find gray. But, that being said, it's your tractor. I'm a purest, I restore everything to as close to original as possible because I enjoy that. Maybe your different, most will respect that.

If you need more info, let me know. I've been playing with these old IH tractors for many years. Good luck, keep us posted.
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Old 01-12-2013, 04:04:37 AM
CJKlossner CJKlossner is offline
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Default Re: 10-20 McCormick Main Bearings

Yes the flywheel is usually a tight fit. The one on my F-30 took a good bit of persuasion. For that one I bolted a plate to the flywheel and used a puller. The last one I did on a T-20 with a plate and threaded rod in the puller holes and a hydraulic cylinder against the end of the crankshaft.

Chris

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