Is 3039R Worth the Cost Over 3033R ?

[pmsmechanic]

@ MessickFarmEqu Some challenges are a little hard to resist so I calculated the difference the same way I calculated the Kubota for my own tractor. Came up with 5%. That's John Deere efficiency for you. Probably this has more to do with engine size than anything but as I say I couldn't resist.

Also I didn't catch this at first but pto hp doesn't measure driveline losses so the original figure of 10-15% loss is probably correct.

@ MtnViewRanch Someone can correct me on this but from what I understand a hydro can put more power to the ground at slow speeds because apparently the hydro develops more torque.

 

[MtnViewRanch]

@ MtnViewRanch Someone can correct me on this but from what I understand a hydro can put more power to the ground at slow speeds because apparently the hydro develops more torque.

I don't know for a fact, but I would think that a manual trans with a creeper gear system would get more power to the ground simply because of no loss through the hydro???

 

[pmsmechanic]

From what I've read and I didn't really pay a whole lot of attention it's something to do with the hydro having more torque at slower speeds. Again I wouldn't take this as fact it's just something that stuck in my mind when I was reading at one point in time. I'm hoping someone who knows can clarify.

 

[Fallon]

I'm happy with my tractor. I will probably be replacing it with a pimped out grand or equivalant JD or Kioti that has a cab here in a few years though. Sometimes I regret the missing extra ponies, but not that often.

I've repeatedly heard the HST has a 15% performance penalty, but haven't calculated anything myself. I'm assuming the PTO is a direct gear drive, so wouldn't really be affected by HST running gear losses in and of itself. The HST penalty would show up in decreased drawbar HP not PTO HP.

At any rate I think the 15% performance penalty is worth it for the usability of the HST, even more so if its less.

 

[Fallon]

The HST probably gets more torque at low speed. You have the pump putting out full pressure with very low flow giving you a bigger mechanical advantage. I expect the weak link would be the pressure release valve, which is kind of its whole point.