I picked up the lock ring pliers today and they worked like a charm. I got everything apart. The super pinion shaft is missing pieces out of the gear teeth, so I’m guessing the previous owner or someone worked inside it and didn’t read the manual. That looks like it wasn’t set up right. Everything just fell out when I took the lock ring off. The other one from the good case the bearing was snug on the shaft and I had to persuade it to slide out. So in this case I’m glad I went with my gut and continued to take it apart. Because I think I would have had problems in short order on the super tranny if I had just slapped some braces on it and went on my way.

I doubt anyone was in it before. There would have been tell tale signs of it. I imagine that someone abused the crap out of it and broke the teeth. It happens. That is assuming you mean the teeth on the pinion itself, and not the gear on the hydro end.... ?? What do you mean it doesn't "look like it was set up right"? Was there any backlash in the gears? What does the gear contact pattern look like? Wes there metal shavings?

Your gut rumbles a lot.... :BlahBlah:

Attachment 87852 I’m no expert but that doesn’t look like even wear to me. The ring gear of the differential looks fine.

Do they come off the assembly line with gray “glue” between all the aluminum parts or the gaskets that the Parts diagram show, and that I’ve used on my 1864? It had gray glue sealer. Maybe nobody was in it. But I know there shouldn’t be slip between the bearing in the front cover and the shaft of the pinion. And I know there’s a snap ring missing from the pinion also. So I’m guessing those parts are in my pump or oil filter. I don’t really care if someone was or wasn’t in it, I’m just glad I took it all the way apart.

Yes, the later ones were sealed with grey gasket eliminator. No gasket.

It may have been apart, but it's also possible that the missing snap ring broke, and things got to moving around. As long as the machine was run with the broken mounts, that eventually snapped the axle tube to pieces, it's no surprise that things inside may also have been broken and neglected. Probably good reason the thing was "junked".

Either way, what are you going to do now? Use the ring and pinion that was in the other case, along with the other case?

No matter what, I'd check the contact of the ring and pinion when you go back together. People like to think, "It's just a lawn mower, who cares. Stick it in a go." But, it can wear out prematurely, or even be too tight and cause issues. It needs to be checked. Go through the service manual on the set up of the rear end. It's good practice if nothing else.


That looks like the pinion was set too deep. May have been that way from the factory. Or, someone may have messed with it. Hard to say at this point.

Maybe the rear end had something to do with it being junked, but the main reason it was junked is because something fell on the hood and shattered all of it, and broke the engine plastic and valve cover on one side. I think I'll have a good tractor when all is set and done. Just a lot of work going into it, not a lot of money because I already have the parts. I don't mind the work, I like to tinker.

As far as what I'm going to do, I wasn't planning on swapping the pinion, I was planning to just swap the reduction gear over, I was figuring that would be the same thickness and not throw everything off as far as shims. I definitely will go through the manual procedures and set it up right, I want it to last a while for me. The pinion in the good case looks good.

I don't know if I would change the set up unless it's bad off. Just check it. It's a straight cut gear set, so it's no where near as critical as the spiral cut on the older machines. Check to see the bearings are tight and not loose, check the contact pattern, backlash, side bearing load on the ring gear carrier.... that sort of thing.

Thanks for your help. I have these two aluminum rear's in pieces and my cast iron rear that was already in pieces separately before I got the super that I'm cleaning out and putting axle seals in because they were leaking, and I see the differences in the spiral and straight cut gears, and I can see how the setup would be more critical in the spiral than straight gears.

:beerchug:

Question... :bigthink:

It seems the expansion plug 726-0126 is no longer available anywhere. Is a Dorman 550-030 the same thing?

Well, the CCC parts book show the expansion plug to be 2.12". Dorman says that the plug you list is 2.12"........

The measurements are the same, that's why I asked. I searched the forum for this replacement options before asking because I was sure I wouldn't be the first person to run across this Cub part number being NLA, and wondered what the replacement would be. The google machine found me the 2.12" (2 1/8") Dorman equivalent part. I hope it works, I'll have a 1957-1959 Dodge Camshaft cover in this tractor. :biggrin2:

I found a pack of 10 for not much more than one plus shipping on feeBay, I'll have them Friday. If that works, I'll have 9 extras.