Jd 9400t, 4850, and 4640. Tracks vs wheeled

[rjfinke]

Recently bought a a JD 9400t and am looking for any information, concerns, worries, etc. that we should look or keep in mind.

Also, we have a medium sized grain cart that we are going to be pulling for a JD 9610combing and wondered about which tractor we should use to pull it.  The 4640 should have enoug power I would think, the 4850 is turned up a bit so has more power and also has front wheel assist, but the tracked tractor has less ground pressure.  Would the power and fuel use be a deciding factor or slippage?  We have had a wet fall in northern ohio and it has finally frozen a decent amount, but is supposed to rain again, so everyone has been rutting up the fields and I would like to avoid this if possible and I think the tracks would help, but would it be overkill?

Does anybody know what the down pressure (p.s.i.) of the 4640 with duals approx. or a 4850 mfwd with duals? I already know the 9400t is 5-6 psi with 30 inch tracks.

[kraft-t]

I have used a Brent 774 grain cart behind a 4640 without duals and it has worked rather well. It depends on the size of your cart and whether you are working in mud or not. We have never had to do that.

I would think the 9400t would be overkill and would much rather add the hours to a 4640 or a 4850. It might be a nice option should conditions get bad but simple economics favor the smaller tractors.

BTW, I was always amused when I pulled a 700 bushel cart with an undualed 4640 and my neighbor pulled a 700 bushel cart with a 500hp quadtrak. I figured I wasn't doing something right.

[steeringwheelholder]

If it was me in your shoes I would put the 4850 on the cart, or even the 4640 if it is a powershift. Put the 9400 on a ripper or chisel and get some help to run it while you're harvesting. (I know- it stinks to buy a new toy and have someone else play with it first!). Does the 9400 have a pto, or is the cart hydra-motors? I have never seen a 9400 with pto before. Especially tracked. You'll get it figured out after a few acres .

[rjfinke]

The 9400 does have a 1000 pto on it and no the 4640 does not have power shift, only the 4850.

[dennymal]

I'd use the 4850. The front wheel assist and power shift may come in handy if you hit a wet spot. Use the track tractor to chisel the ruts.

[mvp farms]

 For the last 3 or 4 years we've run our 750 bu grain cart behind our 4640.  Now the 4640 is gone but it did the job that needed to be done.