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Did IH have positive traction?

M

Michael Price

Member
I sunk my 484 up in the mud and it backed out with both rear wheels spinning. It also blows through 2 feet of snow like its not there. I did notice that both rear wheels were spinning when I did get into some hard packed snow. Did these have some sort of limited slip?

It has a locking rear end, it has the little foot pedal to lock it up but Ive never had to use it. In the summer I did step on the pedal and try to turn to see if it works and it does lock them up fine. It turns fine so I know the rear end isnt locked up all the time but when I get into some nasty spot they both pull it out unlike any other tractor Ive ever driven.
 
I'm certain that they only built open diff's. If your tires have about equal traction they will both spin, when one has more than the other you will only spin one. You can also use the brake on the spinning tire to slow it to put power to the other. Some machines seem to be better at putting power to both wheels than others.
 
Michael: No limited slip differentials on IH tractors. Only the diff lock you are aware of.

IH tractors were all very well balanced and if traction is close to same on both wheels they do spin both. 484 was one of the best in this situation.
 
I"d say the whole 84 series, as my uncle used the 684 to spread manure in winter til we got too big of a spreader. The 4240 is a case update of the 84 series and it would go about anywhere in the snow, and locking the diff made it about unstoppable.
 
Yes, IH did have positive traction on their 2-wheel drive tractors but it was not automatic. If one wheel spun, the nut behind the steering wheel would brake the wheel that was slipping!
 
I do not EVER think I saw my 504 spin both tires at once, even using the brakes. One will stop and the other spin until I let off the brake. Seems I have never seen a Ford, JD, Case, NH, Kubota, or IH spin both at the same time. Maybe I was never in the right situation. Only be stepping on the locker if it had one could I spin both in a bog.

Charles
 
Yes IH had or has many tractors with a differental lock. It locks one rear axle to the carrier in the differential.

Just ride the brake on the spinning wheel to keep it from spinning. This will send some of the torque to the other drive wheel(s).

Remember they both pull all the time but the one with the least amount of traction will spin.
 
The British built B-250, B-275 and their descendants all had a differential lock. The German 1956 onwards D series, the 2 cylinder D-212 and D-217 Farmalls, the D-214, D-215, D-217 and D-219 Standards and the three cylinder D-320, D-322, D-324, D-326 and the four cylinder D-430 etc. all had differential locks. On the 3 and 4 cylinder tractors the lock was both foot and hand operated whereas on the 2 cylinder tractors it was only hand operated. I think the earlier (1953-1965) DLD-2, DED-3 and DGD-4 tractors also had differential locks. Why IH in the US took so long to follow I do not know.
 
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