276d stub axle breaking

[kempryan28]

OK.I found one note saying a heavy duty wheel spindle kit was available for the YM330D and YM336D.
The HD kit had a larger shaft, thicker wheel flange, larger bearings and seals, and improved locknut (inside). th

So far all I see are prices for the larger YM330/336 Front Spindle Kit # 794171-14 100-X
THAT KIT NUMBER WILL NOT FIT YOUR YM276D. I'll keep looking.

There is a hand written note with prices $601 & $1038.. my guess is that is dealer pricing and for one side vs both sides.
Interesting that the locknut is also improved. D\
Was your internal lockneut loose where it holds the output ring gear onto the asle spindle shaft?

rScotty

All great info I will check into the lock nut when I get back to the cabin/tractor for a repair two weekends from now.

So this HD kit does not fit the 276d correct?

The first time I broke it I blamed myself for to heavy of a load and digging/pushing with 4wd on… so imagine a heavy pushing lifting action while the wheel is twisting trying to grab traction. I imagined the load and twisting is what did me in. The last two have been out of 4wd as to let the axel “free spin” with a load. The one that broke last weekend was lifting snow… so not to heavy at all. Frustrating for sure.

Just want to say thanks again for everyone participating and helping me out on this. I’ve had enough of these things snapping for now.

 

[rScotty]

All great info I will check into the lock nut when I get back to the cabin/tractor for a repair two weekends from now.

So this HD kit does not fit the 276d correct?

The first time I broke it I blamed myself for to heavy of a load and digging/pushing with 4wd on… so imagine a heavy pushing lifting action while the wheel is twisting trying to grab traction. I imagined the load and twisting is what did me in. The last two have been out of 4wd as to let the axel “free spin” with a load. The one that broke last weekend was lifting snow… so not to heavy at all. Frustrating for sure.

Just want to say thanks again for everyone participating and helping me out on this. I’ve had enough of these things snapping for now.

Yes, ceertainly check into the lock nut. I doubt it can loosen, but if it did then the spindle could break. Here are two attachments that show the heavy duty parts for your YM276D. It came as a kit. I have no idea where that kit can be found...but at least you know how to begin a search.

There were several front buckets made for your loader, but I doubt the bucket is the problem.

Remember that when pushing with the loader bucket you CANNOT have the front wheels cocked to one side as though turning. You can wiggle them a little, but try not to do so when pushing.

That applies to all part time 4wd tractors with a loader. Push with the front wheels pointing forward, maybe a little turning is allowed, but no no case turn all the way to or near lock while pushing. Especially in snow or mud.

Good Luck,
rScotty

 

[bmaverick]

Yes, ceertainly check into the lock nut. I doubt it can loosen, but if it did then the spindle could break. Here are two attachments that show the heavy duty parts for your YM276D. It came as a kit. I have no idea where that kit can be found...but at least you know how to begin a search.

There were several front buckets made for your loader, but I doubt the bucket is the problem.

Remember that when pushing with the loader bucket you CANNOT have the front wheels cocked to one side as though turning. You can wiggle them a little, but try not to do so when pushing.

That applies to all part time 4wd tractors with a loader. Push with the front wheels pointing forward, maybe a little turning is allowed, but no no case turn all the way to or near lock while pushing. Especially in snow or mud.

Good Luck,
rScotty
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Now for him to reach out to Yanmar USA in GA. Sitting on some inventory shelf there could be a set of these kits.

 

[yanmars]

I got two of those kits for my 336d that had breakage. I think that was over 15 years ago and was told I got the last two in existence. True or not I do not know but no troubles since.

 

[kempryan28]

Yes, ceertainly check into the lock nut. I doubt it can loosen, but if it did then the spindle could break. Here are two attachments that show the heavy duty parts for your YM276D. It came as a kit. I have no idea where that kit can be found...but at least you know how to begin a search.

There were several front buckets made for your loader, but I doubt the bucket is the problem.

Remember that when pushing with the loader bucket you CANNOT have the front wheels cocked to one side as though turning. You can wiggle them a little, but try not to do so when pushing.

That applies to all part time 4wd tractors with a loader. Push with the front wheels pointing forward, maybe a little turning is allowed, but no no case turn all the way to or near lock while pushing. Especially in snow or mud.

Good Luck,
rScotty
View attachment 835792View attachment 835792View attachment 835793

Great find. Thank you!

 

[kempryan28]

I got two of those kits for my 336d that had breakage. I think that was over 15 years ago and was told I got the last two in existence. True or not I do not know but no troubles since.

Surely there has to be some hanging around in a scrap yard somewhere. Let the search begin.

Odds sound slim to none but hey they will always be 0% unless I try!

 

[rScotty]

I got two of those kits for my 336d that had breakage. I think that was over 15 years ago and was told I got the last two in existence. True or not I do not know but no troubles since.

What ID number is your YM336D? We might be able to find more info.

It appears that the YM336D kit was a different kit from the 220/226/276 kit. The 336 may not have required as many kits for that reason as well as the records show a several changes to YM336Ds running gear - so many 336s might have already had the upgrade.

Maybe the 220/226/276 kits are stll on the shelf there today. Wouldn't that be great! Better jump on it. If you cannot find it in Ga. There are several other old parts dealers.

In thinking about the need for a Heavy Duty axle kit, I wonder if the Yanmar engineers underestimated how many USA compact tractor owners would add a loader and how they would use it?
In most of the world tractors of any size are only used as pulling (traction) machines.

Adding to that thought, in my little library of Yanmar USA workshop or parts books I can't find any reference describing adjusting the steering stops at all.....for example to compensate for loader work versus 3pt work.... or even for adjusting the turning stops when adding front axle suitcase weights. Maybe I just don't see it.

But even if they overlooked it, doesn't mean we should. The forces on the front axle spindle go up hugely at sharp steering angles. Don't ignore that part in failures. That stress increase is just the same for any vehicle.

BTW, Yanmar invented and patented that type of bevel gear 4wd front axle assembly. It was much advertised until their patent exclusivity expired. Now that axle design is used by many manufacturers.

rScotty

 

[yanmars]

My records indicate 336D-40379. Also 3T84A-400515. Hope this is of some value. Before I got the Yanmar heavy duty parts I has two after market ones break in just a few hours.

 

[kempryan28]

Just a little Follow up on this. You all were so helpful I figured i'd close the loop.

I got the new stub all put together and installed this last weekend up at the cabin and this time there were a few different findings.

I did check the lock nut on the old one once i got it off... it id not loosen, I see no way in where it could either. its designed pretty well.

1) The first thing I noticed is that the new axel seal wear collar (#29) did not need pressed onto the new stub like my last two installs had needed. I thought this was interesting but continued on as the diameters were still good with no play around the shaft. Maybe just a few thousands off this time around, great no press needed, onward.

2) The install went fine all up until I tightened the final lock nut on the spindle. This is when I noticed the final drive had a few mm (about 3mm) of play up and down the spindle which was also different this time around. I didn't like this and was seeing red flags of my gears moving around on each other, slipping, and also this prone to break spindle wondering out 3mm causing more stress and eventually breakage.

3) I pressed forward and went on with installing it all onto the tractor to see if it would clean up the play once all bolted together. No such luck... once all bolted together the whole spindle with tire mounted had the same amount of play. no good! Frustrating how the same parts in the same order on a different spindle don't fit the same... so much for quality precise manufacturing!

So I ended up getting home and calling Yanmar HQ in GA like a few of you had recommended. Found out my prior installs before I had done it myself were done incorrectly and I was indeed missing an o-ring (#29) and a few shims (#23 and #24) it called for 2 each of the shims per side and I only had 1 each per side. They said to order these reinstall and make sure the final drive gear has no play. Also that I needed to re add the blast to my rear tires to offload the front axels. Heavy implement off the back or not he said this is a must if I was breaking spindles. And like you all had said no 4-wheel drive on hard surfaces and be cognizant of my turning radius especially with a load in the bucket... the wider the better on the spindle.

Lastly, they do have the heavy duty parts still for the spindle! Well at least some of them but not all of them. the parts labeled with a xx-1 (for example 18-1) are all for the new heavy duty axel that is 50mm thick vs 40mm. you'd have to find all the parts on your own as the kits are no longer available, but the parts 18-1 through 30-1 (that have the xx-1 that is would need to be replaced) Myanmar HQ did have some in stock, others they did not and could not get, but he said to ask hoye for the ones that Yanmar did not have as they used to buy up all of the older no longer continued parts. So there is a good chance you could still put together a HD kit for these older tractors! Good to know should another one break on me.

As for now I'm going to rip it all apart again add the o-ring and a few more shims to get rid of the horizontal play of the spindle and final drive, put it all back together and add beat juice to the tires then cross my fingers and hope it doesn't happen again. If it does I will be attempting to find all the HD parts and rebuild with the entire HD kit.

Thanks agin for everyones help... I think we got it licked. ope this helps some people in the future! good luck and happy tractoring!

 

[kempryan28]

Yes, ceertainly check into the lock nut. I doubt it can loosen, but if it did then the spindle could break. Here are two attachments that show the heavy duty parts for your YM276D. It came as a kit. I have no idea where that kit can be found...but at least you know how to begin a search.

There were several front buckets made for your loader, but I doubt the bucket is the problem.

Remember that when pushing with the loader bucket you CANNOT have the front wheels cocked to one side as though turning. You can wiggle them a little, but try not to do so when pushing.

That applies to all part time 4wd tractors with a loader. Push with the front wheels pointing forward, maybe a little turning is allowed, but no no case turn all the way to or near lock while pushing. Especially in snow or mud.

Good Luck,
rScotty
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Super useful service bulletin. thanks for this. See reply below for the avaialbily of the kit per Yanmar in GA.

Also I did check the lock nut on the one that came off... it was not lose. I really don't see a way in where they can loosen either its a pretty stout design as for as that nut goes.

Thank you again for this bulletin... out of curiosity where did you find it at?