With optimum traction etc, how much pulling force at the drawbar does my D6C have?

I keep breaking 3/8" chain when pulling logs etc at the land, and I'm making some new chain slings. I'd like to know what workload limit chain to buy...

I'm also making hitch pivot usera.imagecave.com/whitedwarf3/Hitch_Pivot/Hitch_Pivot.jpg I will connect the chains to this via a chain shackle.

I'm going to do a stress analysis on it here at work and want to know what maximum load to put on it.

I'm making the hitch pivot out of 4140, and will heat treat it if required...

A D6C (74A) with direct drive has a drawbar pull of 26,540 lbs in 1st gear and 17,670 in 2nd and 11,690 in 3rd.

A power shift machine should be a little more but close.

Muzz

Use a cable:D

Good to have a canopy and don't use links and shackles that may break and slingshot into the back of your head. Keep bystanders away too. I have never had trouble with cables recoiling, but we usually break the cable itself, not something on either end. Worst offender is a nylon tow strap/rope. those things are fine within their rating, but work like a slingshot if something comes loose on either end.

I am not surprised. I have broken my fair share of 3/8" chain pulling on stumps with my 16,800 lb. D4-7U.

Even the best "grade 80" 3/8 chain is only rated for 7,100 lbs.
You'd have to be running grade 80 3/4 chain to get to 28,100 lbs working load limit.

Gene, choke your chain around the stump and give it a few windes around and then pull. That should rip the roots and lower the load on the draw. Cut a notch on top and choke it from the back too is good.
Later Bob

use a cable. Its much more forgiving of sudden load changes and you get a stronger hookup in a smaller package. I would use a choker as its easy to hookup and cinches up on load. We always had several handy even when clearing. Of course why would you use a pull load if you had a blade. You would have to stop and get off to hookup. Usualy you would a chain to hookup with smaller farm tractors .The D6 should have a good canopty on it with a heavy screen acroo the back of it. In clearing would only use a pull hookup if I got stuck or on a steep slope. John D

Well, I don't use it to pull out stumps, I dig the stumps out with my backhoe or 225...

When I break a chain it's usually when dragging a log (I usually drag the whole tree, some of the 3ft diameter Maples are pretty heavy) and that log gets caught on a stump or something, or wedged in between a couple other trees or something, then POP!

I made a special sling with grade 80 1/2" chain. Workload limit of 12,000 lbs. Will mount right to the towbar.

I don't tow these logs at full throttle so that should suffice...

I also made a choker chain out of grade 100 3/8" chain to wrap around the logs and hook up to the 1/2" chain sling.

I'll see how that setup works...

And yes, one time I broke a chain hook, if I did not have that ROPS with the heavy mesh in the back, I would be missing part of my head right now...