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Need help with D15

E

Eagle Doc

Member
I look at the Case forum daily but this is the first time at the AC forum. I need parts for a Series II D15 differential and so far I can't find any. I use the classic view and my email is open. Thanks in advance for any help.
 
I call it the center wheel assembly. That is the case and everything in it, bearings, gears, thrust washers, and the ring gear.
 
There was a change in the differential at serial #18569. The tractor I'm working on is after the change. I found a salvage yard that has a tractor that is before the change. It looks like the difference is the ring gear and bolt/nut kit. It looks like I could put my ring gear on the other cage but what is the difference in the bolt and nut kits?
Parts book
 
I've worked on 4 of those rear ends since 1975. If they were used hard (plowing) they would eventually break off a tooth on the pinion shaft. They were half the size of a WD45. Anyway, the very first one I did, (I was 21 yrs old) I didn't realize I needed a "bolt kit for the new ring gear (ring AND pinion gear set). The old ring gear was perfect, so I left it and just replaced the pinion. My Boss and I both agreed "how much noisier can it be" when roading it?? Turns out it was much quieter than most, so that is the way I did all 4 tractors.....leave the old ring gear riveted to the carrier. If that used ring gear/differential assembly looks good....USE IT. The difference in the bolt kit is either length of the bolts (thicker carrier) or larger diameter.
 
Dr.allis I'm not doubting you on using the old ring gear but it
is unusual. Do you do this only with d15 or all allis stuff? I
may have to change a pinion someday never hurts to know these
things.
 
D-15 only. Have you ever driven a D-15 down the road at full speed??? I've never seen one that didn't howl terribly with ring & pinion noise. The four I've worked on over the years that needed a new pinion (missing tooth) are quieter now than they were before by using the new pinion and old/used ring gear. I doubt you'd be able to even get a new ring & pinion from AGCO anymore.
 
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