Farmall Super M Transmission housing and gears

Grademan

Member
I just looked at a Super M in perfect original condition. I mean down to the original fabric on the seat cushion (whats left of it anyway). No dents at all, no rust, original paint. The problem is there is a hole in the rear housing up under the center between where the two axle housings bolt on. You can see where one of the big gears (bull gear possibly) came through the case. What do you think caused this? And do you think my guess of $600 for a parts tractor and $600 labor for a total of $1200 would fix the problem. Any recomendations on what happend and what it would cost to fix it would be appreciated.
 
Probably a bearing came apart and one of the escaped balls got between the housing and a gear and then made an escape hatch out the bottom of the housing.
In my opinion, your repair estimate is probably about right. Maybe a little more labor, depending on what all you have replaced while in there. Despite the damage, it sounds like a really neat condition tractor to get and keep in its original paint.
mike
 
If hole is not too big it can be welded. Have seen Ms that went out and worked for a living, sometimes 6 long days a week, run for years with welded housing.
 
Most definately a bearing, probably the inner axle bearing, came apart. The balls try to wedge in between the bull gear and the housing and the housing loses.

How big a hole are you talking about? If you have the piece it could be welded back on or I've seen patches fabricated to go over such hole, but not as pretty.

By $600 for a parts tractor do you mean buying another tractor for parts to fix this one or buying this one for $600?

You'll want to pull the platform off to see if there is any damage to the bull or pinion teeth. Sometimes the ball can get wedged in the bull gear teeth and then go through the bull/pinion mesh.

With the platform off, the wheel bearings are not hard to change. If the one was worn loose enough to come apart, others may not be far behind. If you shop around you can find a domestic made inner bearing in the $90 dollar range. The inner bearing is a 214W. The "W" means it has more balls and thus a higher load capacity. The outer would be a 214D, it has a shield on one side to help keep the grease nearby. You can use the inner on the outer side for more load capacity, would be a 214WD!
 

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