Driving a HST

[ovrszd]

I find that once I get the engine up over 2000 it smooths out and isn't too loud. Running at PTO speed (2400-2500 I think) with the cutter gets LOUD however, but that's true on any tractor.

The only time I run in idle is when I'm just moving around behind the barn from implement to implement over very short distances. Everything works at idle, just very slowly, and a lot of doing that can't be good for the tractor.

I found the HST very intuitive to use, much more so than a gear tractor. If you play around with it a little, you'll get the hang of it quick.

My little JD2210 is a 3 cyl diesel. It's very rough at an idle. Rev it to 1500rpms and it smooths out. That's usually where I run it. And it performs miscellaneous tasks much better being HST.

 

[akroeze]

So I'm new to my CK30 but I seem to get the MOST power to my FEL when it is running at PTO speeds. If I run at 1800 I just can't get the same kind of go out of it as at PTO. Not sure if this is more perception or reality...

 

[jix]

Hello AKROEZE. Welcome to TBN. I used to live in Napanee. Lovely city, lovely waterfall, lovely people. I miss the place. My dad used to own the bakery on Dundas St.

Jix:drink:

 

[MinnesotaEric]

Linked throttle, which is available on all the eHST machines from Deere, Kubota, Massey, Kioti and I'm sure more as more tractor OEMs update their CUT line-up, allows the pedals to control engine speed just like driving an automatic car. It is child's play and makes the tractor super easy to operate.

At the 2:00 mark you will see a demonstration of a linked throttle with an eHST on Massey's MF1700 series

 

[Katahdin]

Yanmar LX HSTs have a foot throttle that is toggled on with a switch. Its called syncro throttle. When that switch is off you set the rpm with the hand throttle.

It can also be used in conjunction with high rpm pto work. For instance when tilling or bush hogging, set the rpms for PTO work with the hand throttle. Need to stop the PTO and move the tractor? Drop down the rpms to idle with the hand throttle, turn off the PTO, and drive off using just the foot throttle.

When you've reached your destination, stop, engine rpms return to idle. Flick on the PTO, then increase rpms with the hand throttle for PTO work.

 

[TJP89]

So I'm new to my CK30 but I seem to get the MOST power to my FEL when it is running at PTO speeds. If I run at 1800 I just can't get the same kind of go out of it as at PTO. Not sure if this is more perception or reality...

Past a certain point the loader maxes out, I think that is well below PTO speed. What you may notice is the added power the tractor has to push into something.

 

[tman1020]

Well when I test the loader relief pressure on my loader there is a difference in pressure at different rps. Pressure is set at full throttle on my machine. So I would think max lift would be at max rpm but maybe it doesn't work that way.

 

[CJONE]

So I'm new to my CK30 but I seem to get the MOST power to my FEL when it is running at PTO speeds. If I run at 1800 I just can't get the same kind of go out of it as at PTO. Not sure if this is more perception or reality...

A simple hydraulic relief [spring ,ball, seat] works this way. At 3 gpm, say idle on a small tractor, it will relief at full flow at 2500psi. Now increase to full throttle say 10gpm it has to squeeze 3x the flow through the same ports and it has to push the spring and ball open farther and that takes more pressure. Say 2650psi. So I hope that makes more sense why it lifts more at more RPM's. CJ

 

[oldtimer 66]

I have an older JD 4320 Cab model with hydrostatic drive. It also has load match and no syncro throttle. The load match is an option at that time on my tractor a 2006 model. You cannot stall out the tractor with that option switched on. It will back off the ground speed so that the engine maintains a minimum torque output. I can set my throttle to what ever rpm I need and work from there knowing that I cannot stall out the tractor. My dealer said that this option and how it works is the same as and or very similar that the large loaders use that have hydrostatic drive. Just an FYI to this thread. Later.

 

[ovrszd]

My Brother's L3240 had something similar. Kubota calls it Anti-Stall.

No offense intended here. GOD I HATED THAT!!!! Absolutely took ground speed control away from the operator. Engage Anti-Stall and Auto Throttle and a monkey can make the machine move with no worries about stalling or whatever. But then, all the operator was along for was the ride and has very little control as to what is going on. Again, no offense intended, that's why I didn't "Reply with Quote".