DocHeb
Veteran Member
A question in a different thead/topic reminded me of an owning/operating question, and I am posting it in this forum to get the maximal <font color="blue">BLUE </font> owner exposure.
I've noticed something while using my TC40D-SS on steeper grades. If I let up on the HST pedal while going down a 20% grade, one of two things will happen:
1) If I am in 2WD, there is so much HST braking force to the one wheel it will easily lock up, and under wet grass conditions the tractor can continue to slide despite no pressure on the HST, and once even despite full brake application. I've had two rides like this, and it wasn't until I understood what was going on that I learned point two.
2) If I am in forced 4WD, the HST braking force seems to be applied equally to both rear wheels (and presumably one of the front wheels) and I will stop, whether it is wet or not. No sliding. If I only decrease pedal pressure, I go slower.
I have a TC40D with Super Steer (with unloaded R4's), which has an autosensing 4WD activation feature. That means, the tractor operates in 2WD until slippage is detected, and the 4WD kicks in when needed. I now keep it in the Autosense mode, but when working on hills I force 4WD. No more WHOA NELLY! slides down the hill.
I suspect that this 4WD activation only occurs when the tractor is asked to increase power to the wheels, rather than times where decreasing power (i.e. stopping) is requested.
Does anybody have any comments or experience with this?
I've noticed something while using my TC40D-SS on steeper grades. If I let up on the HST pedal while going down a 20% grade, one of two things will happen:
1) If I am in 2WD, there is so much HST braking force to the one wheel it will easily lock up, and under wet grass conditions the tractor can continue to slide despite no pressure on the HST, and once even despite full brake application. I've had two rides like this, and it wasn't until I understood what was going on that I learned point two.
2) If I am in forced 4WD, the HST braking force seems to be applied equally to both rear wheels (and presumably one of the front wheels) and I will stop, whether it is wet or not. No sliding. If I only decrease pedal pressure, I go slower.
I have a TC40D with Super Steer (with unloaded R4's), which has an autosensing 4WD activation feature. That means, the tractor operates in 2WD until slippage is detected, and the 4WD kicks in when needed. I now keep it in the Autosense mode, but when working on hills I force 4WD. No more WHOA NELLY! slides down the hill.
I suspect that this 4WD activation only occurs when the tractor is asked to increase power to the wheels, rather than times where decreasing power (i.e. stopping) is requested.
Does anybody have any comments or experience with this?
