YM 2220D too narrow

[Zoster]

Ridgetop,
I think your spacer idea is great, and simple. I have to pursue that further. Thanks

Herbert

 

[California]

Attached - drawing of the dual wheel spacer for YM195/YM240 (YM1700/YM2000). I think they intend it for use along with an inner wheel rather than as a spacer for Singles.

Source: Optional Equipment chapter of the operation manual.

 

[jdmar]

Here is a photo of a "spacer" of sorts that I use on my 1500. Mine was made to convert to different wheels with a different bolt pattern. But I am sure you could do the same idea simpler with just one set of holes and longer wheel bolts. How much it will help with stability I can not say...talk to a physics guy for that! I do use mine on some farely angled hills and feel very stable.

Peter

 

[jdmar]

A view from between the wheels.

 

[jdmar]

From the outside. My adapters "nestle" close to the tractor hub and new rims and have a ledge for making it easier to mount the rims. You/your machinist could make them much thicker for your use.

Peter

 

[HoyeTractor]

We were thinking about producing some spacers because of the demand for them. We talked to an engineer that pointed out that, these numbers might be way off but it has been over a year, for every 1/2" you move the wheels out you will double the stress on the axle and axle housing. I'm sure that there is an engineer on this board that can clarify this. Souldn't be a problem though unless you have a heavy implement on rough ground.

Aaron,
Parts@HoyeTractor.com
(940)438-0386

 

[jdmar]

OK, so now you are scarring me. Mine only offset the rims by about 1.5 inches....less and the adapters may not be strong enough. Hopefully I am not hurting my little tractor. I am not an engineer but it seems strange this would happen when others put duals of these things. Maybe the duals are still bearing weight close to the tractor and only really gaining traction on the outer tires....hmmm I am just nowhere near smart enough to figure this one out.....
Help!!!..lets get an engineer!! /forums/images/graemlins/crazy.gif

Peter

 

[ridgetop]

I second the motion for getting an engineer's opinion on spacers. Mechanics at the dealer were I bought my tractor told me that they had a customer who is an engineer, and he had made spacers for his tractor that are 5" or 6" thick, and had had no problems. I recall seeing many farm tractors with very wide-spaced wheels when I was a kid in the mountains of western NC, and never heard of a problem.

I tried reversing the front wheels and it didn't add that much stability (because of the articulated axle) but did make the steering much harder so I returned them to the normal position. I'm certain that spacers will add some stress to the rear axles and housing, but I suspect that they are substantially overbuilt with ample margins to handle it. With my 2" spacers the rear track on my 1510D is about 47", which is still a bit less than the track on most built-for-the-US compact tractors in the same size range, and the Yanmar seems to be more robust and better designed and constructed than most. I don't have a front-end loader, but do carry some heavy loads on the carry-all on the 3-point hitch, but at slow speeds and with no bouncing over rough ground.

In the worst case sceniario I think I'd rather bust an axle or housing than to roll the tractor over onto myself. /forums/images/graemlins/wink.gif

 

[Zoster]

Hi all!
I just love this forum. All kinds of ideas, all kinds of opinions, experiences, concerns. All through posting a simple question. All this wisdom is exactly what a rookie tractorist like me needs.
I think I'll put some more stress on those rear axles and put some kind of spacers on. Most of my hillside work is simple harrowing, so not too strenuous for the Yanmar but it would make me (feel) safer.
Thanks again to everybody.

Herbert

 

[htiek126]

What is the distance between the inner and outer bearing centers for the rear axle? The inner bearing will experience a greater load, the outer bearing should experience the same load, and the axle will see a greater bending moment. On the 1510, the axle is about 2" diameter and 6" from outer bearing to wheel center. A 2" increase in length will increase the bending moment (Moment=ForcexDistance) by 33%.

Assume the rear axle steel is 40,000 PSI steel (standard grade steel). The area of the 2" axle is 3.14 square inches, so that works out to 125,600 pounds of force to fail. Assume the full weight of the 1510 (1250 pounds) with an attachment (400 pounds) all balanced on the one rear wheel with a safety margin of 2, that is 3,300 pounds. Now multiply by the distance to get the bending moment: 8" x 3,300 pounds = 26,400 pounds. The rear axle is still 5 times stronger then that maximum load.

Disclaimer: I am not a structural or mechanical engineer...