What is HST?

   / What is HST? #21  
</font><font color="blue" class="small">( Be careful, there is a transmission that is called a CVT that, in design is nothing like a hydro or a gear drive, actually, I think, may be the best of both worlds, and is taking off quite well in the ag market
Chuck M. )</font>

This may be old news, but did you hear that Ford is putting a CVT into the F-150? I gotta drive one just to say I did. /forums/images/graemlins/cool.gif
 
   / What is HST? #22  
Henro,

Finish your thought re: hills. What are you suggesting is the advantage, (or disadvantage) of HST on hills, (I doubt that will produce. much dissension here .......NOT!!). Seriously, the last dealer that I spoke to said that he nearly flipped on a hill due to hitting the "brake" on the hydro, ( he hit the "gas" and almost flipped when he jumped it forward.

I have rolling hills that are just begging to test my ROPS so this is a real concern for me before I buy my tractor.

I agree that from what I have heard that for all the work involving lots of reversals, e.g. loader, snow, auger work that any tranny that simplifies this is desirable. I also have a wife and 2 daughters and only the wife and I drive manual trannies, (The girls will learn in time). So a girlie tractor may be just the ticket for a girlie man like me, (they love their Dad).

Finally, when do you worry about power loss??? In the smaller tracs 20-30 HP only, i.e. is it an real issue in all HP ranges or just a theoretical one?? My JD dealer sez he is only going to stock the twentys in HST, this probably says a lot about his customer base as we go from Ag to farmettes.

bj
 
   / What is HST? #23  
Without a doubt, get the Hydrostat. You will never regret getting Hydro. But you may regret not getting it. It's worth the extra coin. Especially if you have any little kiddies that might be driving the tractor ever. No gear grinding! /forums/images/graemlins/laugh.gif
 
   / What is HST? #24  
</font><font color="blueclass=small">( Henro,


Finally, when do you worry about power loss??? In the smaller tracs 20-30 HP only, i.e. is it an real issue in all HP ranges or just a theoretical one?? My JD dealer sez he is only going to stock the twentys in HST, this probably says a lot about his customer base as we go from Ag to farmettes.

bj

)</font>

You have to understand, most of the talk about power loss is from compact tractor zealots. /forums/images/graemlins/grin.gif You lose a little power when going from manual to automatic in a car also. But you don't think twice about it until someone starts pointing it out to you.

Trust me if you buy a well balanced tractor with a Diesel motor you will not have a problem with power loss from the hydro. Just make sure you match the HP of the tractor with the attachements you will want to run in the future. Read some of Bob Skurka's postings on matching up HP and you won't go wrong with Hydrostat.
 
   / What is HST? #25  
Kurt - Different tractors have different ways of engaging the PTO. But many including mine have a dual or 2 stage clutch. Pressing the clutch pedal down half way disengages the drive clutch while leaving the PTO clutch engaged. Pressing the clutch down all the way disengages both. That allows stopping or slowing the tractor or changing gears without affecting the PTO.
 
   / What is HST? #26  
</font><font color="blue" class="small">( But many including mine have a dual or 2 stage clutch. Pressing the clutch pedal down half way disengages the drive clutch while leaving the PTO clutch engaged. Pressing the clutch down all the way disengages both )</font>

I have a question on this exact phrase concerning two stage clutches.
Is it possible to inch the tractor forward when using a PHD to keep the auger bit plumb, while continuing to dig? Does this require keeping the clutch pushed part way in with one foot while the other foot on the break and then releasing both slightly while twisted in the seat watching the bit?
Can this be done reasonably well?

Thanks. As I stated, part of my choice for HST was not realizing if this could be done safely and comfortably.
 
   / What is HST? #28  
</font><font color="blue" class="small">( Seriously, the last dealer that I spoke to said that he nearly flipped on a hill due to hitting the "brake" on the hydro, ( he hit the "gas" and almost flipped when he jumped it forward. )</font>

If you get on LOTS of equipment (like a Dealer does) stuff like this will happen. But when it is your machine, you learn wherre ethings are, it doesn't change, and lss likely to have issues.

But with a Hydro, it becomes even easier. Hydro owners rarely even use hte brakes, since lifting a foot from the hydro pedal brings the unit to a stop.

And I sure hope that dealer doesn't think its a "gas" pedal!
 
   / What is HST? #29  
<font color="blue"> Finish your thought re: hills. What are you suggesting is the advantage, (or disadvantage) of HST on hills, (I doubt that will produce. much dissension here .......NOT!!). Seriously, the last dealer that I spoke to said that he nearly flipped on a hill due to hitting the "brake" on the hydro, ( he hit the "gas" and almost flipped when he jumped it forward. </font>

Nephromancer,

For me the greatest advantage of the HST on hills is that it allows me to go at whatever speed I want to, all the way down to zero, easily and without ever having to depend only on the brakes alone to hold the tractor in position. The drive train always remains connected to the engine/HST. At least as long as I don’t push the clutch in or accidentally knock the speed range lever into neutral!

Since speed changes are gradual and smooth, not requiring any inherent ability to perform flawlessly, this gives me one less opportunity to screw up when I’m in an uncomfortable situation. At least as long as I (unlike the dealer you mentioned /forums/images/graemlins/grin.gif ) have the ability to distinguish between the HST pedal and the brake pedal, or even more important, the clutch pedal. Normally during tractor operation I don’t need the brakes though, since the HST pedal returns to center when I take my foot off it, and the tractor stops and holds position while waiting for my next command.

On my back hill, especially when I was cleaning it up a bit, clearing brush and smaller trees, I had to do a lot of moving around and between trees, sometimes with only inches to spare on each side, and sometimes while the tractor was positioned at an odd angle. Being able to slow do a creep, and move VERY slowly, without worrying about shifting, made my life much simpler than it might have been otherwise.

Whenever I get in an uncomfortable situation I really appreciate the ease with which the HST allows me to stop, think and reverse direction smoothly, again all the time never having to disconnect the engine/HST from the wheels, always having the engine/HST holding me in position, with the brakes also there as a backup if I need them.

I have many times thought to myself: “Man I’m glad my tractor is an HST,” when on slopes over the last couple years. Always when in an uncomfortable position or course. The slopes I am talking about max out at about 22 degrees and are not as steep as many here deal with.

This is the way it works for me. I do believe that the HST adds an element of safety when it comes to MY tractor and ME. Each of us are different though... /forums/images/graemlins/smile.gif
 
   / What is HST? #30  
nephromancer <font color="red">regarding HST versus GEAR on hills. </font> This is a tricky one because we each have our own version of what a hill is. In my case my property is where a small creek joins a small river. So I actually don't have real hills, I have 2 ridge lines with steep slopes that go down to a flat valley. Elevation drop from the front of the property to the middle of the property is 55', the rear half of the property drops only 5' feet to the creek. The top of the property is gently rolling but has a couple steep bumps. 2 of my neighbors have described my property as the lot from HE** for the purposes of mowing.

Now that you know where I come from in my slope issues, I would not want to use a GEAR machine to do anyting on my slopes other than decend or climb them. On the other hand, with a HST machine I can use the loader on those slopes with a reasonable level of confidence. Bear in mind, I would never consider turning ACROSS my slopes with any conventional tractor, operations are strictly UP and DOWN.

IF I had gently rolling hills, then I might sing a different tune about gears. But would you feel confident backing up while looking over your shoulder while raising the bucket loaded with rock and trying to turn to avoid the tree that is behind you making sure, all along that the bucket is not going to smack a tree that is adjacent to it, on a gear tractor . . . on FLAT ground? If the answer is no, then consider the added issue of instability while working on even a very mild hill.


<font color="red"> when do you worry about power loss? </font> What you need to do is just find the right size tractor for the jobs you want to do. I think it is safe to say that most folks would never notice the power loss. However, you do need enough power to accomplish your tasks. So if I was you, I would lay out the tasks you want to accomplish and rank them by your projected time spent on each of them. For example, if mowing is going to take 2 hours a week and you mow for 36 weeks a year then mowing = 72 hours. If snowblowing is going to take 1 hour, and you do that 10 times, that = 10 hours. Tilling the garden is typically done 1 or 2 times a year, a modest garden might take a total of 2 hours a year. General landscaping chores, FEL work, post hole digging, etc all are harder to quantify and could range from 30 minutes a week to 20 hours a week. Bear in mind most home type users put less than 100 hours a year on their tractors and 50 hours a year is often typical. Now IF you are buying a machine to tear apart your lot and put it back together again and then farm it after that, much of what I just said probably doesn't apply. But if your the rural/suburban 3 to 15 acre lot owner who want to pretend to be a land baron and master of his domain, then much will probably apply. So rank your tasks. Consider your soil, climate, terrain. Guestimate how important any one thing really is and rank it higher.

IN MY CASE:
--I mow and till so I am a PTO hp junkie.
--But I have tight spaces and trees to deal with so I want small tractors.
--Small tractor, largest engine for the frame size.
--I have clay soil, I don't want a heavy beast leaving ruts.
--I have lots of trees to mow around, tight turning is an issue.
--My garage door is 7' high, I want a ROPS that is NOT 7' tall.
--FEL work is secondary, I want good, doesn't have to be best in class.
--I need a dealer who can back me up because I know enough to take stuff apart, but not always put it back together (know your limits).
--I want a well stocked parts source because I will try just about anything.

Now bear in mind I am NOT an expert. I grew up in the city/close suburbs. There are lots of guys here with lots more technical experience than I. I often speak in general terms, I often am right in the practical sense of things but often can be picked apart by the guys with technical & mechanical knowledge that is well beyond mine.
 

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