HST or gear-drive?

[TORQUIN]

I thought about this 21 years ago when I got my Kubota, and I went with the best of both worlds, the GST transmission. 12 forward speeds and 8 reverse, shuttle shift, gear driven with an automatic clutch. You can push the clutch pedal if you want, but you don't have to. I do not have to deal with ranges, or the power loss, like the HST. The GST does have two ranges, but that is taken care of automatically also, and I just choose my gear. That said, I do see a place for an HST, constant forward and backward motion, like moving dirt from one pile to another, right next to it, but generally, when I move dirt I am moving it from one end of the property to the other, so I use the low gears to pick up the dirt then high gears to get it to where I have to go. With the Kubota HST, you have to stop, change range, then start up again.
All in all, I made the right choice for my tractor tranny. Been very happy with it for all these years.

Chris

 

[Quilceda]

My WM75 is gear, the TC40DA and WM25 are HST. The WM75 only comes in gear. If HST were an option, I would have gotten it. When mowing pastures in mid-range at 2000 RPMs, PTO speed, my options for gears and speed are 1st gear - 1.6 MPH, 2nd gear - 2.4 MPH, and 3rd gear - 3.5 MPH. My back won't tolerate 3.5 MPH. With HST I could set the speed to the fastest possible that my back can tolerate and I can still walk the next day. Losing PTO HP due to having an HST wouldn't be a problem. The WM75 has 60HP PTO, so even gears cause a 20% reduction.

My WM75 would be a lot nicer to use if it didn't have a hair-trigger clutch. Makes close-order work hard so I use an HST tractor for most everything. Otherwise it's a dandy tractor.

 

[RB5]

Farming like row crops? Wrong tractor. Moving hay, stabbing from both ends, stacking in barn, mowing around any objects, stump grinding, tilling or any precise work where you move in more than one direction or very slow and controlled, I prefer HST and my left leg really likes it.

Power reverser. No clutch at slow speeds. Works great for loader work and moving hay bales.

 

[Mudfarmer]

I have both. I can do everything I do with either, but I have my preferences. For example, I like maneuvering with the HST. But I prefer mowing with the gears.

 

[Sawyer Rob]

My neighbor sold me his tractor, told me he was going to go buy a 40hp john deere to replace it. He said the dealer told him he'd like the whiner tranny and with 40hp it would be perfect for his haying operation. I told him, that wouldn't be my first choice, and I didn't think he would like the whiner tranny or the tractor, he went on about the cruise control yadda yadda yadda.

He bought it and just hated the whiner, he was used to using a lower rpm when raking hay and loading big bales, he complained to the dealer, and they told him he'd get used to it! After several weeks he insisted they come get it and bring him a gear drive! AND to show that they were such a wonderful dealer they found him a gear drive and said they wouldn't charge him the EXTRA THOUSAND DOLLARS the "gear drive" cost! lol lol (damcrooks!)

He has more things he doesn't like about the tractor but at least he doesn't have to put up with the whiner anymore. lol

SR

 

[Saucymynx]

I think that so many of us use HST now that the geared tractors don't get a fair shake.

A geared tractor isn't like a truck where we are always shifting gears when changing speeds. When a geared tractor is doing any ground work like mowing, plowing, cultivating, it basically stays in the same gear. You start out in whatever gear fits the job, and from that point the tractor just goes back and forth in that sae gear without any additional clutching. The three point raises and lowers at the end of rows, and speeding up or slowing down are done with the throttle on the dash. There is rarely a need to shift to a different gear.

It's only when using the basic geared farm tractor as a chore & loader tractor that the clutch gets used a lot. That is where HST is king, but modern clutches used right are still good for many thousands of hours even in that use. And a replacement clutch is lots cheaper than HST rebuilds.

A nifty compromise for cost and effiency is a geared tractor with auto clutching and a lever for a hydraulic reverser. That allows the loader tractor to have the advantage of gears and still go back and forth in any gear without using the foot clutch. Kubota calls that system their "glide shift", but most manufacturers offer it as as "power shift with a reverser".

rScotty

I second this. I don’t have and have never had an HST tractor but I do have a barn full of gear tractors. My main heavy tractor is 100 hp, 12,000 pounds. It is gear drive with clutchless shifting between gears, a hi/low selector (think torque amplifier) that is also clutchless, and a clutchless reverser. Seems like the best of both worlds, and I don’t lose 20 hp with an HST swash plate. When it comes right down to it, you’re paying for horsepower and it does not make a lot of sense to give it away through an inefficient power transfer mechanism. I get it for doing tons of loader work, and I do a fair share cleaning out our barns, but the trade-off isn’t worth it to Me.

 

[Saucymynx]

My WM75 would be a lot nicer to use if it didn't have a hair-trigger clutch. Makes close-order work hard so I use an HST tractor for most everything. Otherwise it's a dandy tractor.

Does your tractor have an adjustment knob to sloth the engagement? A lot of tractors that size range have a dial that will increase or decrease engagement time. It makes a difference. Those clutches are all electronically actuated