226D rear drive problem

[ancientlake]

Hello,

Haven't been on this forum in years. Finally have a Yanmar again.

Bucket hit a hidden stump full tilt on my 226D. Heard a metallic snap sound and now shaft to rear drive is not turning. Shaft does turn when tractor is pushed/wheels manually turned. Front drive works fine. Took shaft cover off and both ends look ok.

Anything easy (shear pin etc) or do we need to get into the front axlel? I won't be doing that because I am obviously not a real mechanic.

Thanks,

Chris

 

[winston1]

Little confused. Thinking you lost 4 wheel drive? Does the shaft turn coming out of the drop box when 4 wheel drive is engaged? Might have to jack it up to do some trouble shooting.

 

[ancientlake]

No drive at all without front drive engaged. Front drive only (I assume) when 4WD engaged.

Thanks

 

[winston1]

Oh me! Sounds like a stub axle (final pinion) broken. Could be sheared ring gear bolts. What happens if you mash the differential lock with the 4 wheel drive not engaged?

 

[ancientlake]

Thanks. Away from the tractor the next few days, but will check out what the differential lock does when I get back. Can't imagine it would have any effect since the shaft to the rear isn't turning.

Chris

 

[normde2001]

Thanks. Away from the tractor the next few days, but will check out what the differential lock does when I get back. Can't imagine it would have any effect since the shaft to the rear isn't turning.

Chris

What do you mean by the "shaft to the rear"? It is inside the bellhousing/transmission. How can you see it?

 

[ancientlake]

Hi,

Sorry for my lack of knowledge/terminology. The shaft that runs from the front axle to the rear axle (prop shaft?). I slid the covers off it so I could see both ends. Thanks,

Chris

 

[normde2001]

Take it, Winston.

 

[winston1]

The front axle is driven by the shaft you are talking about. The main drive shaft from the engine enters the transmission at the back of the clutch housing. Power goes from there through gears on to the drop box that drives your front wheel drive. Sending you a PM.

 

[ancientlake]

ok gotcha. Will check your pm, and refrain from more posting until I do a little more homework!
Thanks,
Chris

 

[clemsonfor]

yea you have snaped the main shaft in the transmission I think that powers the rears. Or like Winston said sheared the ring gear...or snapped or rung off an axle, that is why he wants to see if a rear will turn if the diff is locked. If you know the front axle is pulling you still have front drive and the shaft you see to the front axle is fine and working.

There is no shear pin in the drive line.

 

[ancientlake]

Yes, Winston got my head straight via PM. Just had a chance to check a few more things and here's what I know:

Rear left does have drive when diff lock is engaged.

PTO works normally.

Jacked rear right and it freewheels even when in gear (although with a bit of mechanical resistance)

Start it up, put it in gear, and rear right will turn, but feebly and can be stopped by grabbing the tire.

Thanks everyone for the education: Guess I was sick that day!

 

[winston1]

Sounds like the right final pinion (brake shaft) is broken. Part #194430-33410. Opening up will be only way to tell for sure.

 

[ancientlake]

Sounds like the right final pinion (brake shaft) is broken. Part #194430-33410. Opening up will be only way to tell for sure.

The problem was precisely what Winston described. Took awhile to get parts but I am back in business.

Thanks all,

Chris

 

[clemsonfor]

That's good news.