YM1702D wants to die when returning to idle?

buppy69 · Jul 26, 2006

pruntyc said:
Tractors are made to run at a constant rpm, not changing all the time. You aren't suppose to work one at less than around 1800 rpms, so in most all cases the foot throttle is of little use. Maybe in Japan where they were made to be used there was a good reason for them, but not here. Not many tractors built here have ever had foot throttles, as there was no good use for them. If you are using it, you are probably using it at too low a speed for the good of the tractor.

That's the first time I've ever heard you can't use a tractor below 1800 RPM's. I used mine Saturday for 6 hours with a fertilizer spreader at 1000 RPM's. The engine would have a lock out if you weren't supposed to use it at low speed.

Eugene

pruntyc · Jul 26, 2006

Look in the manuals, diesels shouldn't be worked at that low of speed. I'm not the one that said it, I read it in a manual for these tractors. Some gas tractors in this country had a foot feed, and was worked slower, but I don't know of any diesels that had them, they may of had, but I never worked any that did. You are suppose to warm them up at 1500 rpm. And no they wouldn't have a lock out, if they weren't to be run at a lower speed, that don't even make sense, where did you get that one from? That would do away with the idle, think about it.

Eddie · Jul 27, 2006

Eddie said:
If it wasn't meant to be used it wouldn't have it on it. I had a 1100 and a 1105 Massey Ferguson that both had foot throttles. Roxy, you're just fine using it that way.

These are 100 HP DIESEL tractors. Now you know of some that have foot throttles!!!!!

HGM · Jul 27, 2006

I think the point that Dick is making, is "working"... I guess everyone has their own desciption of "work", but a spreader doesnt put a load on the engine like a cutter, boxblade, FEL, tiller, etc... The engines rated HP and Tq are at operating speed, typicaly 540PTO speed if I'm not mistaken.. This engine RPM should be in the 2200RPM range on most tractors, again if I'm not mistaken.. For the most efficient/power producing operation of the tractor, it should be in this range.. I totally agree that its your tractor, use it how you want... The point is that you might be better off, in most cases, running the engine at peak HP/Tq range.. I dont have a FEL, but since you guys have mentioned how its usefull to use the foot throttle in that application, I have to assume you are correct as it does make some sense as long as the RPMs are up when loading the engine.. To each his own...

buppy69 · Jul 27, 2006

You are correct as far as using PTO powered implements. If you look at the torque curve of a diesel engine(which is what does the pulling, not HP) it comes up high right off of idle and stays virtually flat throughout the RPM range meaning you can work this engine hard at any point within this range.. On a gasoline engine the torque doesn't start coming up until midrange.

Eugene

HGM · Jul 30, 2006

buppy69 said:
You are correct as far as using PTO powered implements. If you look at the torque curve of a diesel engine(which is what does the pulling, not HP) it comes up high right off of idle and stays virtually flat throughout the RPM range meaning you can work this engine hard at any point within this range.. On a gasoline engine the torque doesn't start coming up until midrange.

Eugene

Agreed, Tq is what gets things moving, but the Hp is what keeps the momentum going.. The reason I prefer the higher RPM is that you have a lesser chance of lugging.. The Tq rating may be nearly the same from 1500-2200, but its much easier to maintain it at the higher RPM.