dumb question about HST

[LouNY]

Thanks for your reply SR.

Your last comment about creep gears and stump grinding caught my eye. I've been wondering about that very thing.

I have two geared tractors (both 8-speeds), and although I've never used a PTO powered stump grinder, I would guess that low range, low gear in my tractors isn't quite enough of a creep to run a "pull behind" stump grinder (without a lot of clutch work).

I do plan to purchase a stump grinder with next tractor purchase and the "pull behind" would save me a few $$$ over the "hydraulic swing" if it would work.

If I go with another geared tractor, I'm leaning towards TYM/Branson 5520R (16 speed!) or 5835 (12 speed).

Wondering if either of those tractors can move slowly enough in low gear to use the "pull behind" stump grinder?

Only if it has a "creeper" range in addition to the normal Hi Med Lo.

 

[jyoutz]

Thanks for the many informative replies.

Good to read that HST tractors do in fact use gears to drive PTO.

The lower PTO rating for HST not being due to how the PTO is driven, but instead is the result of the increased overhead of HST makes sense, but I hadn't thought of that.

Of course there are some high HP stationary PTO implements that are run with range . I guess that in that case, HP would be the same Unfortunatelybetween gear and HST.

Just buy a tractor with enough hp and don’t worry about a few reduced pto hp with a HST.

 

[phantom309]

Only if it has a "creeper" range in addition to the normal Hi Med Lo.

10-4. Since I've not read anything about a creeper gear on those two tractors, I guess it's time to cue the sad trombone: wah, wah, waaahhhhh.....

 

[phantom309]

Just buy a tractor with enough hp and don’t worry about a few reduced pto hp with a HST.

Yes, good advice, but...

I really, really, really want to buy a tractor with that good old mechanical injected Kukje/TYM engine. That engine tops out at 55 or 58hp. I wonder if I might end up down on power and/or have problems with HST running hot.

 

[jyoutz]

Yes, good advice, but...

I really, really, really want to buy a tractor with that good old mechanical injected Kukje/TYM engine. That engine tops out at 55 or 58hp. I wonder if I might end up down on power and/or have problems with HST running hot.

I don’t know why that would be an issue. My MX6000 has 63 gross hp and pto hp of 52 hp. Never had an issue with the HST running hot after running a 6’ cutter for hours.

 

[phantom309]

I don’t know why that would be an issue. My MX6000 has 63 gross hp and pto hp of 52 hp. Never had an issue with the HST running hot after running a 6’ cutter for hours.

My original plan was to use new tractor to replace an old Case/IH that I run a 7' finish mower with. Any config of Branson/TYM with "Kukje" engine would run that mower with ease...

But as I've been looking online, I've come across others that have run 12' and 15' batwing mowers behind these same "Kukje" tractors!!!

So that's got me thinking... If those other guys can run 12' and 15' mowers behind their tractors, then surely I can use a similar tractor to pull my Rhino Turbo 120, which is a dual spindle, ten footer.

I'm currently pulling that mower behind a JD 4020.

The old farm tractor pulls the Rhino mower easily, but the combo of the Rhino mower (3.5K lbs) and the 4020 (11K lbs) is too much for my trailer, so I can't use that combo on any property more than a mile or two from home.

But if I could pull the Rhino behind one of the "Kukje" powered tractors (half the weight of the 4020), I would be fine.

That would really be a great option.

But according to the specs, any Kukje powered tractor would be below the minimum hp rating (55hp at PTO) for the Rhino mower.

One weird thing is that the minimum hp for Woods 12' batwing is 35hp and their 15' batwing is 45hp. Given that, I wonder, why does my 10' Rhino require 55hp???

I remember that the the JD salesman I ordered the mower from said that the Rhino was a "commercial" mower (with heavier than normal gearboxes?), but still...

So I'm wondering if my best chance of running that large-ish mower behind an "under powered" tractor would be to stick with gears?

(or stick with the 4020?)

 

[K5lwq]

The 4020 is probably the best tractor JD ever made and could be the best overall. I would not be replacing that tractor.

 

[phantom309]

The 4020 is probably the best tractor JD ever made and could be the best overall. I would not be replacing that tractor.

Yeah, thanks. I do like the 4020, and will be keeping it. It'd just be nice to also be able to pull the Rhino mower behind the smaller tractor so I could trailer it more easily.

In line with this thread on HST vs gears, I do have to admit that I do prefer a traditional 'H' pattern gear shifter and a separate transfer case lever instead of the JD single lever maze of gears!

 

[phantom309]

Speaking of the 4020 (and other JD tractors of that era), I've always thought it was pretty cool that the classic Nelson "rain train" sprinkler was obviously styled based on those JD tractors:

Note the overhanging "brow" at the front end, followed by the looooong arched hood with the little bump at the operator's station to house the gauges. On the sides, the front part is solid (where the fuel tank sits), followed by the vertical grills (radiator vents) and then the engine bay. Just like those old JDs!

 

[ptsg]

Yeah, thanks. I do like the 4020, and will be keeping it. It'd just be nice to also be able to pull the Rhino mower behind the smaller tractor so I could trailer it more easily.

In line with this thread on HST vs gears, I do have to admit that I do prefer a traditional 'H' pattern gear shifter and a separate transfer case lever instead of the JD single lever maze of gears!

The 5520R you're looking at provides just that. H pattern synchronized gears on the main 1st to 4th gears, and H pattern for the range gears, A to D. Synchronized shuttle shift lever as well.

Honestly, these things are so easy to use and somehow gets such a bad reputation based on mostly myths spread all over the internet. You get much a more capable tractor too.

The only size of tractor could possibly consider being HST, would be those SCUTs, as most of them don't have independent PTO and the HST will make for it. That's about it.

I work my tractor on tight places, with loads and loads of direction changes. Just a quick clutch in as you move the shuttle lever and clutch out, it's done. Never once had feel "I wish I went with HST".