B7000 vintage

[newb7000]

I am new to the forum, I've been looking at a B7000 and after reading your column I purchased one and had a few Questions
1 I read you can tell the year by serial # B700020905
2 What size tires do I need to replace the old rice paddy tires I have
Rear tires are Bridgestone 8-16 Fronts Bridgestone 5.00-12
I know I need the proper size ratio for 4X4 and don't want to screw it up.
Thanks for now, I'm sure there will be more questions later
Craig

 

[5thhorseman]

Hey, welcome to the forum. I don't have the answer to your question but someone else surely will. What's wrong with the old rice paddy tires anyways?

 

[mickeyd]

Welcome to the forum. Well you it is between 1973 and 1977 since those are the years they were made.

 

[North Idaho Wolfman]

Craig,
What column are you talking about?

Not a snowballs chance in (H E double tooth picks) of being able to tell you the year of a Gray/Grey market Kubota, it's tough enough to get strait answers on the Non grey Kubota's for year made.

The size of tires is the same regardless if they are rice tires or regular AG tires, 5.00-12 on the front and 8-16 on the rear.

 

[Tomcat]

Welcome to OTT! Good luck on finding out the year of your machine. I've been all over the web for that info on my B7000. Not really important, I'm just curious. Stay with the same size tires and you should have no problems. I happen to like my rice paddy tires for the soggy areas on my farm, only bad thing is driving on hard surfaces makes for rough ride!!

 

[newb7000]

Thanks for the input, like Tomcat I'm curious. I thought I read about the serial# thing on one of the forums but memory's not what it used to be. Old tires are all split, ride like a chuck wagon and tear up my yard, other than that they are great

 

[gomur222]

I physically checked the output ratio on a B7000 to about 300 turns the ratio is 1:1.32567, 1:1.326 is close enough. Commonly the 1.0 is subtracted in the vernacular of output ratios. The tires on this tractor are 5x12 and 8x16 original Bridgestone Japan rice tires, they are cracked but holding air. Carslisle have lug tires that will match your ratio with confidence. By memory Rear tire is 98 inch circumference.

 

[Tomcat]

Keep the sizes as per original to avoid problems with binding up the 4WD and you should be ok.

 

[gomur222]

I Must correct my previous post in regards to subtracting 1.0 from the inter axle ratio, that is a practice that is applied after calculating lead/lag for 4x4 tractors. My error. The lead/lag information is covered on other posts - one pasted below

http://www.tractorbynet.com/forums/owning-operating/21578-4x4-lead-lag-stress-drivetrain-print.html

 

[gomur222]

Quick look on eBay 5x12 Regency 20.8 inch. another brand height 5x12 20 inch. If you have 4x4 you must select tires carefully as the front and back internal ratio must be maintained to approximately +5% -0% and that would favour overspeeding the front tire. In simpler terms the front tire should be a little bit bigger than a perfect match (up to 5%). The ratio for B7000 is 1 turn at back axle to 1.326 turns front axle. For example if you use Regency(pn 382-333) 5X12 at 20.8 in. diameter X 1.326 = 27.6 in. back tire required. The Carlisle (pn 570002) 8 X 16 at 31.4 in. is way too big.