8070 FWA - Wrong Tires?

Nebraskafarms wrote: Thats interesting... You confirmed what I was thinking and its appreciated.  Now my question now become why do so many of these 8070's have 26" rims on them??? since atleast according to the one owners manual this was not a option for the front rims.  Then another question you mention the 3% lead.  if one was to put smaller tires on the front then what is called for in theory that would prolong the life of the MFWD but would also lead to less "help" when the 4wd is needed correct?

While reduced lead would likely reduce the loading of the FWA components, it would also reduce tractive effort-----------------the front wheels are usually in looser soil (first wheels to go over the ground).  Turning could also be an issue without some lead.  The factory recommendations were based on testing with a number of different lead ratios.  The 2-3% seemed to give the best results in the conditions tried.  There are always other conditions. 

Could you not check by measure a length(say A hundred feet ) mark tires and then check to see if it gained or loss .Don't have fourmale but I am sure you can make a compriseon.

sooooo...you gonna drive it home or have it hauled?

Our first set of '82's 8070's PS with 6th low and 2nd high were the same speed. 20.8 rear and 14.9 on the front. The 14.9 were shot after 1200 hours. The '85 8070's, like ILGleaner said are nose high with the 18.4 on the front, but the 18.4 last. The 14.9's would break the lungs in half. I like the 18.4 on the front. If we would go to 30" rows, then I don't know what to do. 18.4R38 or 42. I have even dreamed about an AGCO DT275, but, dreaming is free.

Would you please post the specification page so we can please see the right hand side of the page??  Thanks

I was bidding on it too NF...but you went higher!

So I dont think anyone answered this... was allis actually putting on these 26" rims on the tractors??  My tractor is a late 1984.  Seems like guys with 85's are who have 26's... maybe Allis was getting rid of surplus parts?

so it it engineered to turn the same speed front and rear? unlike 44's on vehicles that the front turns a bit faster than the rears?

ALLIS ABSOLUTELY DID PUT 26 INCH FRONT WHEELS ON SOME OF THE LATER 8000 TRACTORS!!!! I SOLD 3 OR 4 OF THEM LIKE THAT! THE ADVERTISING LITERATURE DIDN'T ALWAYS REFLECT WHAT WAS COMING OFF THE ASSEMBLY LINE !! IT ALSO DIDN'T REFLECT THE LATEST POWER SHIFT TRACTORS HAD A FASTER LOW RANGE, BUT THEY DID !!!   Also, a 20.8 takes an 18 inch wide wheel and an 18.4 takes a 16 inch wide wheel.

Something that I have wondered about and applies here, some brands of tires vs others the same size tire was not the same as others, seemed like goodyears ran on the small side. The other thing is if you your fronts wear out faster because you weight down the front and you are running duals on the back. Then you change from worn out fronts to brand new fronts. I will say from the picture the tractor looks like it is sitting level so many of them look like they are going up hill. If you are thinking about planting with it you may be  looking at other sizes so you can make the tractor turn around on the end of the field.

Edited by DanWi - 03 Jan 2016 at 10:57am

I would if i had a 42" rim!!  Curious can i just put on the larger 38" tires (20.8R38's)  on the 38" rims that currently have on it 18.4R38's or is it a different rim all together??

Edited by Nebraskafarms - 03 Jan 2016 at 2:02pm

IF; one was to put on 18.4R42 on the rear, did AC have a larger center casting or would I have to run those butt ugly step up rims?

Daehler wrote: Unit3 wrote: IF; one was to put on 18.4R42 on the rear, did AC have a larger center casting or would I have to run those butt ugly step up rims? On my 42 the piece that holds the rim to the center is longer. Its a factory non power shift rim with Mexican hat centers. Looks as a 20.8 38 but there is more of a gap between the rim and center.

can you post a picture? I've been curious about a way to go to 42 inch on my 7050. Step up rims are pricey.