Tires 336D Wheels and Tires

[RAL]

I really like my 336D with FEL. I wish it were not so tall in order to make it more stable on hillsides. I want to replace the rear and front wheels and tires with ones that are smaller diameter. Has anyone done this?

I feel I need to keep the overall ratio of the circumference of the front and back wheels the same. What would be helpful is if anyone has a refernece on the circumference or diameter of different tractor tires.

Thanks for any help,

Allen

 

[reb]

I think you can find the tire info you need on the Firestone website. I don't remember exactly where, but I saw it in the ag tire area.

reb

 

[kayssupply]

I have a set of spools to put duals on your tractor. It is another option for width. I'll take $50 and freight.

Or you can attach the spools and put your wheels back on the spools. It would give you about 8" more on each side.

 

[hosejockey2002]

Our fearless moderator (he knows who he is) had a 336D with REALLY wide turfs on back. Maybe he'd be so kind as to post a picture and tell you where he got them. /w3tcompact/icons/grin.gif

 

[roger_scotty]

Thanksfor the wakeup HJ. Fearless huh!? That would be nice..... if only it were true..... Anyway, I'm still here, but something came up and my time has been really limited the last few weeks. Another week and I'll be back in shape.

This must be the picture you are thinking of. This was the "super-wide" factory turf tire option on the last of the YM336D. These tires and wheels were a factory option for any of the YM336Ds or JD1050 tractors that used an 8 bolt rear wheel. Not much on the 336 matched the 1050, but the ratios, wheels, and tires were the same. Maybe for the 6 bolt wheels as well, but I've only seen them for the 8 bolt. The only changes required when I changed to these from the Ag setup was to use the corresponding front rims/tires and going to a tapered-head type lug bolt.

Alternately, all of the YM336 tractors could mount a standard turf option that used a skinnier smooth diamond tread balloon tire on the standard Ag rim.
The super wide turfs do make it a lot more stable on slopes, but it does not turn so easily as before. It will plow the ground with the front tires if I try to turn too sharp. It never did that with ags or thinner balloon turfs. To me the tradeoff in stability is worth it. These super wides also lower the tractor a couple of inches.

You are quite correct, any wheel and tire combination can be used as long as the proper front to rear ratio is maintained and the tractor's belly doesn't drag on the ground. The ratio for the late YM336D is 1.694:1. That is the same as saying that 36 turns of the rear axle is exactly equal to 61 turns of the front axle. I measured it. So the trick (for a 336D) is to go to the Firestone and/or Goodyear tire site and select a set of front and rear tires with a rolling circumference ratio that is within 10% of that 1.694:1. Oh, if the tire specification is given as "loaded radius" you multiply by 3.14 to get rolling circumference. DO NOT USE "OVERALL DIAMETER", the real rolling circumference is the only valid number for calculating front to back ratios.
The next step is to buy the recommended rims to fit those tires. The final step is to specify the wheel center has the proper bolt circle (most are standard) and that the centers have sufficient offset so that the tires will clear the tractor as they rotate.
I'll be glad to help on this if I can. Gear boxes and ratios have always held a fascination for me.

 

[clifst2310]

Roger you forgot to explain how well the tires help the tractor float.

 

[roger_scotty]

Uhhh...Clif you would remember that! But it wasn't the 336, it was the YM165D - also with turfs. Like TractorErnie's adventure it is the kind of thing you only do once. I'll not go into too much detail because I wouldn't want to spoil someone else's surprise. But I will say that if you try to cross a fast running creek on a small tractor with fatty turf tires you may find that your tractor floats. In fact, it will float down stream just fine.......for awhile......until the current pushes it up against a rock and turns it over on its side. BTW, it turns out that the Yanmar diesel runs just fine if it falls over into the creek in a position that leaves the air cleaner out of the water. A prudent man should have the presence to take it out out of gear at that point. The whole process is confusing enough without having a rear tractor tire spinning around next to your ear.

 

[jimstractors]

Hope you got a video, or at least some pictures.../w3tcompact/icons/shocked.gif/w3tcompact/icons/shocked.gif/w3tcompact/icons/grin.gif

 

[clifst2310]

At least I didn't mention twinkies...OOPs (LOL).

 

[roger_scotty]

The crazy thing is how clueless I was. Though it didn't happen particularly fast, the tractor was tipping over before I realized exactly what was going on. The whole episode happened during a flood and there were some cameras being flashed around at the moment......I figure that it was only good luck and clean living that prevented me from starring on video.