Engine RPM VS Loader Lift Capability

[_RaT_]

I find my L3830's sweet spot is at very close to that, about 2000 RPM. Funny thing is, at 2000 RPM, it is still amazingly quiet.

 

[frank_f15]

Rat: sorry , pehaps i was not clear in the last post. i did not mean to say i run wide open , usually for Fel work i run about 1800 or 1900 rpm. give me good power and not jerky.

 

[frank_f15]

seems the sweet spot is the same for both our B2400's /forums/images/graemlins/grin.gif

 

[_RaT_]

No, no Frank, no apology, I knew what you meant and was really clarifying it for others. Did not mean to imply you don't know what your talking about. I was just out digging with the loader for a new irrigation main. I was at 2000 RPM and could still hear a car drive up. It is a real delight to operate at the lowest useable RPM. So smooth!

 

[jinman]

RaT, I understand the "jerky response" and I also think that a person who uses a piece of equipment until it becomes an extension of himself can run at much higher power and not jerk his tractor than the average person. It's like getting used to the clutch on your vehicle and then going to one that feels different. It takes awhile to adjust. I have noticed that full-time operators go at speeds I'd never attempt, especially those guys with the excavators who are swinging around, stopping on a dime, and dumping the bucket into a dump truck. If they misjudge by a foot, it cost big $$$. /forums/images/graemlins/blush.gif

 

[_RaT_]

First of all Hi Jim. How's that joystick? I agree with your statement. I know a fella that has pretty much become the surgeons or surgeons when it comes to hoes. He said for him, operating at the lowest speed is always a bonus for noise, wear and fuel use since he does it 8 hours a day almost everyday. When the digging is easy like in good clean soil, he says he just fires it up and digs as fast as the machine allows. On the job he's at now and been there for a little over a year, it's all rock and he throttles it way down because it takes away the noise and fuel use. You make a good point though.

 

[jinman]

RaT, my hose-clamped joystick is still performing flawlessly. I keep expecting it to give up, but it just goes to show you that "back yard engineering" sometimes is better than the stuff coming out of the factory. /forums/images/graemlins/smile.gif

I'm wondering what the effect of throttling back is on a Kubota HST transmission? Can you get enough power to spin 3 tires at 2000 rpm or less? I find that if I have any down pressure from the loader or an implement on the 3PH, I need about 2,500 rpm to spin my wheels. When pushing brush, I leave the tractor at 2500 and I win most battles against small trees. Of course, it also depends on the type of soil beneath my wheels, but for me, there is a big difference between 2,000 and 2,500 rpm for power to the wheels. However, the loader seems to have as much lift power at 2,000 rpm as it does at 2,500. What's your take on this?

 

[_RaT_]

No question Jim, the HST will take all you can give it and if you have some more, it will take that too. I find using the loader for digging and delicate work works best at 2000RPM and if doing loader work where I 'm moving material around, I'm up closer to 2300 to 2500 and in medium range. It all depends more on the circumstance I'm working with. I find I rarely spin the tires. Part of it is inherent though in that I run the pedal based on engine RPM drop/increase. The joy joystick is alive and well, all is right in the world. /forums/images/graemlins/wink.gif Rat...

 

[JasonMac]

All I know is my loader has more power at a higher RPM. When I have a full bucket of wet loam or clay, when breaking out of a pile, my loader may lift it about 3ft, when I keep holding the loader lever back, and raise the rpm the loader instantly responds and can lift the load to full height without a problem. I've tested this before, out of my own curiousity