X00 Weight Distribution

When hauling a tractor I google the basic
weight of tractor. I adjust tongue weight
by where tractor sits on trailer. I'm
about to haul two at a time. I'm
curious how the weight is distributed
front to back. Is engine or rear heavier
for hundred series tractor? Loads will be
some mixture of 861D, NAA, 740, 860
Elenco.

no answer, but if you get no better, maybe scale the 8N which is about 60R/40F.

Engine is about 450 if that's any help.

put a jack under the middle adjust back and forth till you find the balance point

Thanks. That helps. With that info I think I'll drive the first one on and back the second one on. Should give me plenty of tongue weight with heaviest sections over axles.

Don't forget to take into account any ballast in the form of wheel weights, front bumper weights and/or liquid filled tires.

Yes, I've got wheel weights, loader,
Elenco front end....I can get a good
guesstimate on that, but wasn't sure how
the weight of the base tractor was
distributed

me thinking aloud..

As both axles are nearly to each end, it would be close to 50/50. However the rim and tires, weights and ballast.... are not equal and throws the tractor off at that point. rear rims and tires would throw about ????? 400lbs to the rear over the front tires and rims... 400lbs is pulled out of the air.. others probably can get closer to that.

keep in mind the bigger tractors had heavier tires.

So, a 400lb add to the rear of a 4000 lb tractor would give you close to a 60/40.

Now throw in a 1500 lb loader that has large overhang on the front plus the 375 lb bucket and stir the soup again... maybe back to 50/50 or even 45/55

Now add in the wheel weights and go down and split weigh at a scale,,, it to figure out what really happen.

As both axles are nearly to each end, it would be close to 50/50.

Click to expand...

Not so. It depends on the position of the center of mass relative to the two axles. If the center of mass is forward of the geometric center between the two axles then there will be more weight on the front wheels than the rear wheels. It has to do with the amount of rotational torque being exerted around each axle based on the distance of the center of mass from that axle, and then applying that torque to the longer distance between the axles. Physics 101. Think of it this way, if you have a weight box on the rear of the tractor and you put too much weight in it then the front wheels will come off of the ground because the net torque around the rear axle exerts upward force on the front axle and lifts it. The same applies to the difference in force between the two axles as the center of mass varies from in front of the front axle to behind the rear axle and everywhere in between.

When putting two tractors on a trailer you need to know the weight of each tractor and where the center of mass is on each of them to make an informed decision on where to place them and how to orient them on the trailer in order to get the proper weight distribution for a good tongue weight (usually 10% of the total weight of the fully loaded trailer). Or you could do some trial and error if you have some scales.

One of the tractor pulling clubs used to weigh one axle at a time. My 960, with the both the front and rear lightened a little weighed twice as much on the rear as the front.

(quoted from post at 09:49:58 05/29/19)
One of the tractor pulling clubs used to weigh one axle at a time. My 960, with the both the front and rear lightened a little weighed twice as much on the rear as the front.

Click to expand...

6R/34F

(quoted from post at 08:49:58 05/29/19)
One of the tractor pulling clubs used to weigh one axle at a time. My 960, with the both the front and rear lightened a little weighed twice as much on the rear as the front.

Click to expand...

960 shows to weight around 3280 shipping and 3600 operating weight.

(quoted from post at 19:25:44 05/29/19)

(quoted from post at 08:49:58 05/29/19)
One of the tractor pulling clubs used to weigh one axle at a time. My 960, with the both the front and rear lightened a little weighed twice as much on the rear as the front.

Click to expand...

960 shows to weight around 3280 shipping and 3600 operating weight.

Click to expand...

via tractordata.com so we can at least start with something....

How much does a rear 12.6x28 tire and rim weigh over a front 6.00x16 rim and tire using the standard sizes shown on tractor data.com? Would 10% of 3600lbs = 360lbs.. so would there be 360 lbs for a pair of tires difference thus give you a 60/40??

Well a 12.6x28 firestone shows to weigh 110 lbs. a 6.00x16 bkt shows to weigh 19 lbs as a quick tire search on the web found on the web..

Now what the difference between a 16 inch rim and a 28 inch rim? I can find where a 16 inch rim weight around 17.2 lbs. The outer rear rim with 6 loops weighs 55 lbs. plus the center pressed rim weight of 62lbs for a total of 117 lbs vrs the front rim at 17 lbs.....
So a total tire weight of 36 lbs on each front and 227 lbs on each rear tire. with a difference of 191 per side or a total front to back difference of 382 lbs more on the rear. So back to the 960... the tires alone give you an rear increase of 382 lbs more than the front if I did not fudge the math. So.. the tires alone put 382 lbs more weight on the rear...

Now.. take spin out rims, the cast iron centers, or 13.6 over the 12.4's and put even more weight on the rear...Add water or other ballast... hang a bunch of suitcase weights on it and it all changes.... And some rowcrops have the extra heavy cast iron front wheels so that will spin the wheel back the other way

but if the tractor were built a perfect 50/50, the wheels would move you 382 lbs to the rear just by themselves. the other 250 lbs we are looking for is the rear end overhang. The fact the rear end casting adds more weight behind the rear axle center line than the radiator and grill do in front axle center line and then the lift arms also... and presto your at 60/40...