276d stub axle breaking

[kempryan28]

Hi gents,

I’m having issues breaking my front left stub axle. I am on my third one in 1.5 years. It’s getting old dropping 350 on a repair every time. Admittedly it is when I have a load in the bucket but after the first one I have began to be more careful and it keeps happening. Yesterday it snapped off with a load of snow in the front bucket… certainly not so heavy it should have broken again.

Is there anything I should be looking at that may be out of alignment? Tow, camber, ballast weights etc?

I did have the tire ballast removed from my left rear when I got a flat a few years back. I did this so I could get the tire off and to a shop easier for repair when flats occur or anything else. Would that be doing it? I have countered this by making sure I have a heavy implement off the three point when using the bucket… Ie during the summer I have the box blade off the back and during the winter I have a snowblower on.

Any help would be appreciated I sure am tired of replacing stubs. Thank you.

 

[kempryan28]

FYI it is a 4 wheel drive capable tractor and it does usually snap when I have the 4wd engaged. I have noticed when my 4wd is on not all 4 tires are spinning. Is that normal as well.

 

[Menagerie-Manor]

Are your front wheels installed properly or did someone spin them to increase overall width. Doing that can overload the axles.

 

[kempryan28]

From what I can tell they appear to be installed properly. Or at least when repairing the stubs the parts are all in line with the diagrams I have found on hoye. What would I look for if a prior owner had modified it?

 

[Dman1981]

Does it snap wheel or inside is it
Held on by a nut snap ring
Does it have a front diff lock ?

 

[kempryan28]

Snaps right where the center meets the hub, See photo of axle.

There are snap rings involved but if I remember right from my last install the top silver piece in the photo threads on last to hold everything together. Here is a parts diagram photo as well and link to hoye to determine what is what.

4WD INTERNAL ^: Yanmar Tractor Parts

www.hoyetractor.com

It does have a differential lock.

 

[ponytug]

Three in a year and a half is excessive. I suspect that you have an underlying issue that is causing the problem.

I would suspect something is wrong in the 4WD set up, unless you drive on pavement or other hard surfaces with 4WD engaged.

Are your tires the correct sizes for your tractor? Is the differential lock on or off? How sure are you that it is off? Is there a chance that the front or rear differential could have been replace with a different gear set?

All the best,

Peter

 

[Hoss710]

how sharp is the corner that it's breaking on?

 

[kempryan28]

Three in a year and a half is excessive. I suspect that you have an underlying issue that is causing the problem.

I would suspect something is wrong in the 4WD set up, unless you drive on pavement or other hard surfaces with 4WD engaged.

Are your tires the correct sizes for your tractor? Is the differential lock on or off? How sure are you that it is off? Is there a chance that the front or rear differential could have been replace with a different gear set?

All the best,

Peter

The tire sizes are stock and correct.

I drive with 4wd mostly on idaho dirt in the summer mix between packed and loose then ice/snow in the winter.

I hardly ever use the diff loc. it is the pedal under my right side of the seat that I can engage with my heel correct? Honestly I never knew that is what the function of that was until about 6 months ago and even now when I get stuck on bumps and no wheels touching the ground have drive I forget about that function 9/10 times and just back up and go over the bumps at a different angle to solve the problem. How would I be sure that is was unlocked?

 

[kempryan28]

Does it snap wheel or inside is it
Held on by a nut snap ring
Does it have a front diff lock ?

Sorry forgot to reply to you and instead answered your questions in the thread below.

 

[kempryan28]

how sharp is the corner that it's breaking on?

There is nothing touching where it snaps off except an the axel seal wear color which I have pressed on at a local machine shop before I do the install.

 

[Hoss710]

There is nothing touching where it snaps off except an the axel seal wear color which I have pressed on at a local machine shop before I do the install.

your not answering my question.

 

[kempryan28]

your not answering my question.

Would you please specify? I guess I don’t understand. Turning radius? Corner of the broken part? I’m not sure what you are asking.

 

[Menagerie-Manor]

From what I can tell they appear to be installed properly. Or at least when repairing the stubs the parts are all in line with the diagrams I have found on hoye. What would I look for if a prior owner had modified it?

The rim in the pic is showing the face of the rim that points out which positions the wheel over the axle. Owners sometimes flip the rims around to widen the stance but that's not fun for the stub's if the bucket is heavily loaded.

 

[winston1]

Both rear wheels will spin if differential lock is pressed. If not, wheel with least resistance will spin. Front wheels will both spin if on equal traction, if not, the one with least resistance will.

 

[kempryan28]

The rim in the pic is showing the face of the rim that points out which positions the wheel over the axle.

View attachment 835448

Thank you. I can’t find my better photos of the wheel broken off last time but here are a few of it from some photos I had when my wife was working on it.

 

[Menagerie-Manor]

Thank you. I can’t find my better photos of the wheel broken off last time but here are a few of it from some photos I had when my wife was working on it.

Looks to be faced correctly....

 

[careyo63]

looking at the bad wheel the top of the tire looks to be leaning in and Pointing out. Bet the other front wheel is point staight level. Likely not all that bad of a repair. Hoye may have and upgrade on the axel if that is the problem this time?

 

[rScotty]

Thank you. I can’t find my better photos of the wheel broken off last time but here are a few of it from some photos I had when my wife was working on it.

Yes, that front wheel and tire are both mounted correctly. I've got an old Yanmar glossy advertising brochure and it shows that orientation.

That loader in your photo is also the top of the line Yanmar quick attach loader made specifically for that model Yanmar.
That loader style was good but heavy and not all that common - it was an expensive accessory at the time. That model loader is completely rebuildable including bushings.

So all in all, that is a real nice tractor. Sorry to hear that you are having troubles with the front axle.
Is there any chance you are asking too much of the loader lift? Or did it break in "normal" service?
Is the power steering working well?
Those axles are usually pretty strong.

Now that I think on it, I vaguely recall seeing some old factory techi nfo about that model and the front axle spindle. So maybe Yanmar did design it too lightly. Normally when that happened in the old Yanmar days there was a recall program and improved parts - all of which got a lot of documentation.

I'll look around and see if I can find any references in my old literature.

rScotty

 

[rScotty]

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