Tractor Sizing How important is rear diff lock on CUT?

[Loadstar]

My older tractors never had a diff lock. When we purchased the 655A it has 4wd and a diff lock. I love the diff lock on that ford! When looking for a newer tractor I didn't need the front wheel assist so much but a diff lock was very important to me.

 

[94BULLITT]

Someone should do a test on the diff lock. See how much a tractor will pull then see how much it will with the diff locked.

 

[k0ua]

Someone should do a test on the diff lock. See how much a tractor will pull then see how much it will with the diff locked.

What?, actual scientific evidence? I, dunno...

 

[SSdoxie]

Someone should do a test on the diff lock. See how much a tractor will pull then see how much it will with the diff locked.

Not real scientific bu thave done it. I was chained to stump try to it out. One rear & one front spinning and digging holes, stopped and engaged dif lock when I start wheel motion again tractor tried to come over backwards & I was hooked to the actual draw bar not the 3pt. Dif lock does work but my HST pedal is on same side as breaks so couldn't use brakes and didn't even think of it.

 

[vtsnowedin]

Do competition pulling tractors use posi rear ends?

 

[94BULLITT]

Do competition pulling tractors use posi rear ends?

I was going to mention that. I don't think they do. If they did they would not be able to steer with the brakes.

 

[ZR900MAN]

It would be a deal breaker for me...My JD2305 has a lock and I use it a lot....snow blower....loader work...must have

 

[beeforty]

Well I just learned that I have a diff lock on my little Ford 1210, don't remember seeing it in the manual but it is there:laughing: Also my old International Cub has a locking lever to lock to power to the left, right or both wheels, at least when it would stay in detent

 

[SPYDERLK]

Not real scientific bu thave done it. I was chained to stump try to it out. One rear & one front spinning and digging holes, stopped and engaged dif lock when I start wheel motion again tractor tried to come over backwards & I was hooked to the actual draw bar not the 3pt. Dif lock does work but my HST pedal is on same side as breaks so couldn't use brakes and didn't even think of it.

This back tip is a special case ... climbing out of a hole while pulling is very dangerous because the traction point shifts forward of the rear axle and has more leverage on lifting the front.

 

[SPYDERLK]

If you got 2wd and no diff lock, you only have 1wd
If you got 4wd and no diff lock, you only have 2wd

I use my diff lock most when moving dirt/gravel. Helps me push deeper into pile.

Wrong.

2wd is 2wd even if one wheel is spinning. The non spinning wheel will be trying to propel the tractor with the exact same forward force as the spinning wheel is.

Same with 4wd.

The reason I find the diff loc dont do much, is cause if traction between the two tires is near equal, it wont do much. Now if you drop a front in a blow hole and one of the rears unloads or is in the air, yea it will get you out. Or if one tire is hung in a mucky ditch and the other on solid ground, it will help. But so will split brakes in both cases.

Its certainly not a fact. With an open diff, both wheels are driving with equal force. THAT is a FACT.

If one wheel happens to have significantly less traction (in the air, on ice, etc) then the wheel with good traction can ONLY deliver an equal amount of force as the wheel with lesser traction.

It seems you understand how lockers and open diffs work. So lets not perpetuate the false terminology by saying 1wd.

Go get yourself cross axled and tell me how many wheels are spinning..

In 2wd you will have 1

In 4wd you will have 2

And the ones that aren't spinning, are trying to drive the vehicle with the exact same force as the ones that are spinning.

The number of wheels spinning has nothing to do with how many are trying to drive.

LD1, I had a "knocking your head on the keyboard" icon for this type of case. I gotta try to find it.
larry