H Farmall Final Drive Strengtheners...

CoopertownBob · Oct 26, 2011

Me and my brother are both having the same problem with our Farmall H's. Both are breaking rear end components with alarming regularity! Any one out there have any ideas on how to keep these things together?

The parts breaking thus far are as follows:
bull gears
bull pinions
differential spider gears

Farmall International 748 · Oct 26, 2011

What year H you running? If its an early H I suggest running a later model rear end. I know the pto shaft was smaller on the early H"s, maybe the entire rear end was lighter. Just an idea.

SouthernFarmall · Oct 26, 2011

I know that different height rear tires (caused by unequally worn tread) can cause spider gears to wear out.

SF

LCB · Oct 26, 2011

How heavy are you pulling.Unless you are turning a 150HP or more and not running MW gears you must have some other prolem like bearings are something not lined up right.The gears and rearend are simler to 460 and you know some of them are over 600CUI.

CoopertownBob · Oct 26, 2011

(quoted from post at 12:17:24 10/26/11) How heavy are you pulling.Unless you are turning a 150HP or more and not running MW gears you must have some other prolem like bearings are something not lined up right.The gears and rearend are simler to 460 and you know some of them are over 600CUI.

The one that broke the spiders had two different size rears on it when purchased, so that may explain that one.

The tractors in question are a '39, a '40 and a '42. We are pulling up to 5500 with them. The '42 model is the worst offender. It eats pinion shafts and bull gears like candy. It also has the most HP of the three. All it takes it for the rear to hop once or twice from sudden traction grabs and the very next hook it usually breaks something.

Will 460 rears fit in H's? That would solve all the problems I think.

Anonymous-0 · Oct 26, 2011

I have running all sort of

I have run all kind H,s for years never broken anything in the rear, large and small HP several years on rears.Your problem tires no,alingment probability yes, when you find it keep us advised.Thanks If i think some more ill let you know.

gtx1967jewison · Oct 27, 2011

Have you tried applying a good coat of green paint LOL

CoopertownBob · Oct 27, 2011

(quoted from post at 11:53:53 10/27/11) Have you tried applying a good coat of green paint LOL

We did on one and that is when it broke! When I tore down the other one after it broke, I found some green over-spray on it! :lol:

LCB · Oct 27, 2011

No they wont fit but are simlar.You may check with somebody smarter then me but super H might be hevier.I know gear ratio is faster.

CoopertownBob · Oct 27, 2011

(quoted from post at 18:59:57 10/27/11) No they wont fit but are simlar.You may check with somebody smarter then me but super H might be hevier.I know gear ratio is faster.

The Super H stuff will fit the later models, but these three are all to early. Super H gears are hardened, and we may either see what it will take to make them fit or either find the best set that fits we can and just have them hardened instead.

The '40 model that ate the spider, the problem turned out on it to be an old crack that had rusted nearly through. It was a wonder it hadn't broken sooner really. When building that particular tractor, the diff was never pulled apart to check, so it got by us. Won't make that mistake again...

H Farmall Final Drive Strengtheners...

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