I was talking about the hours from letting it idle while he cut wood. Sent from my GT-P3110 using Tapatalk
Is your HST electronically controlled or direct mechanical? Electronic HSTs can take a lot of the counter-intuitiveness out of operating an HST. Systems like Deere's LoadMatch and other similar features offered by the competition will automatically get the most out of the trans. All you have to do is stomp the pedals. Think of that HST pedal like a gear shift. Push it a little, you get high torque, slow speed. Stomp it and you will get more speed but less torque. But most tend to treat it like a gas pedal where the harder you stomp it, the more power you get. And that just isn't the case.
I believe it is just mechanical MM. I have used HSTs before but am still getting use to it. My last two, the 210C and the L35 before that were put the power reverser (Glide shift) in forward or reverse and give it the gas with the pedal. Lots of power, and the more you wanted the more you pushed on the gas. That is what is normal for most of us. So I'm getting use to increasing the RPMs right up to 22-2500 and running it like that. Just not use to running a tractor at that engine speed all the time. I have a set of ear muffs hanging right on the throttle handle and have been and will be wearing them each and every time I use it. Under operating the tractor it specifically says, "Do not apply load on tractor at low engine speeds. Always apply heavy loads at full throttle RPM of engine." WTF? FULL THROTTLE? I have been reading how the transmission works and how more RPMs puts less stress on mechanicals of the transmission parts. But I think I or we learned on the old stuff and that if you didn't need the engine RPMs so high you didn't put them up there. Less wear on the engine. It will take some getting use to. I have seen the power now though. High RPMs and when pushing put it in low gear. Wow.
Yea its really strange to me the new logging skidders i am around (Tigercat is the one that comes to mind) there now all electronically computer controlled throttle. They will be sittimg there ideling. They just simply go to say open or close the grapple and the engine revs up to full throttle just to close the arms or open them. Im not talking about lifting logs just open or close empty grapple. Then back to idle when not demanding any throttle. The older ones were wide open all the time and burned more fuel so they put the back to idle feature on it, when i guess its in an "operation" mode?
Linde/Baker forklifts are like this too...I'm not sure if this is done electronically though...the older ones weren't, I think it was done hydraulically somehow, but the newer ones very well may be electronic controlled now...I dunno, I haven't been around any newer ones recently...
The problem is that a HST can easily over-power your engine at lower RPMs like trying to climb a hill with your car in high gear. Also, the lower fluid flow in the trans at low RPMs reduces cooling and so you get extra heat to contend with. Running the engine at 2200+ rip 'ems won't hurt it a bit compared to constant high loads at low RPMs. And while it may be full-speed, it's not really full throttle. Throttle on these engines is automatically set based on load rather than a direct link to the pedal or lever. You set an RPM set point and the engine will either electronically or mechanically adjust throttle to maintain that RPM setting. There's nothing wrong with a lower RPM setting when you are just putzing around the barnyard so to speak but for actual work, don't be afraid to spin'r up a bit.
Quick read is right, it's a very broad overview. One thing about a Power-Reverser type trans is that I would prefer a hydro to them if they are a dry clutch type as they often are in a compact tractor. Dry clutches are a matter of when and not if they will wear out. With loader work, that day arrives a lot sooner too. And not very many compact tractor owners are enthusiastic about splitting their machine to replace the clutch or spending thousands to have it done professionally. Comparing an entry-level lawn tractor HST to something in a compact tractor was fairly mis-leading as well. They hardly mentioned that there are differences (BIG differences) and made hydrostatic sound pretty weak across the board. And I can't ever remember seeing a sliding gear type trans in an entry level lawn-tractor. They use multiple sliding keys cut into the countershaft (usually) attached to a shift collar which is actuated by a pivoting shift fork.
My tractor has auto throttle advance. With it on, when press on the hydro pedal it speeds the engine up. At a light hydro pedal the engine may turn 13000rpm. At full hydro pedal the engine is full throttle. The new Kubota L60's also have a power up button (I think that is what it is called). When the button is pressed it speeds the engine up 2200-2500rpm. So if you have auto throttle on then you need to use the loader you can hit the button the joystick and speed the engine up. Also with the hydro and throttle being linked when you left of the hydro then engine rpms drop helping stop the tractor.
It was time to do a little drainage work on the old camp road behind the horse pasture today. Over the last few years I have slowly been building up this road as I find cheap or free fill. I will need to install culverts or rock drains in four or five places under the road. But for now I dug four shallow ditches across to get things drained off. The 75B has some decent power but the ground is still frozen so it was slow going by scraping with the teeth to get it broken up. This should allow most of the water to run now. I guess I should have taken some pictures of the finished ditches.
Man I wish we had winter this year. We had basically 2 weeks of cold. And a few other cold nights but basically had spring or fall weather all winter so far this year.
Got some work done with the tractor today. First pic was taken yesterday on walk through the woods. I was standing on a pile of trees and brush the loggers had dropped in the creek to make it easier to pass over. Then they never removed it. Anywho. It was good training for me with the 75B backhoe. Cleaned it out decent enough and the stream is flowing better now. Fork load. Far from done, but it's moving better now. You can see how much debris was in here with the pile on the right. I removed an entire Ash tree that was about 12" at the base and prolly 40-50' tall. I then had some fun with the grapple starting to clean up their landing. That is going to be a big job. But I'll tackle it a little at a time.
Construction/commercial grade hoes have replaceable teeth too...at least all the ones I have met. Creek lookin gooder Gas!
You and thewoodlands are having lots of fun with these new machines! I am a bit jealous as our ground is way too soft to take a tractor over rigjt now. I am patiently waiting for the next freeze before getting some logs delivered.