Need advice on my kioti

[radios1]

Depends on the tractor, I climb some pretty big hills with my little Massey with a 500lb weight box and a 5ft oversized bucket with tires loaded with rim guard in high range no problem. I had two NH TC45DA tractors that had a hard time climbing the same hills in high range. Not all hydro's are equal.

there you go, it depends on the brand, and the brands commitment to quality Engineering.. slippage is wasted energy..

 

[K man]

Sorry guys, did not mean to start arguments between members. I was only asking for suggestions and maybe the title of my post was not properly named. As suggested by one member to try rename it to a more friendly question. He also suggested that I contact the Moderator to change it to a more appropriate post. I love my Kioti and not bashing the brand or anything.
Again sorry
Gilles

 

[Egon]

If the HST is operating properly and the operator is using it correctly RPM’s remain constant and ground speed varies.

 

[K man]

If the HST is operating properly and the operator is using it correctly RPM’s remain constant and ground speed varies.

Yes I agree with you Egon. I have noticed that working with the machine on flat grounds. Sometimes when trying to work with the loader if I am not in the right range the machine will bog down and as soon as I change the range it perks right up again. So definetally RPM and Range selection work together.

 

[K man]

I致e used a CK25 which is the most underpowered machine I致e ever used and it still beats what the op is describing. Either his hills are more like mountain atv trails or there痴 something wrong. Maybe something simple like a parking brake. I致e never found a hill on the road I couldn稚 climb in high range. As far as what痴 a typical roadway grade there痴 some pretty steep hills around my place.

I will give you an idea of how high the hills are. One hill is 1 mile long and I am going from flat ground to 1300 feet to the top. 2nd hill is 1/4 of a mile going from flat to about 500 feet and there are a few not so high in between. Now if you can find a hill around your area that is close to the same height and distance then you tell me how your machine performs as I am curious.

 

[Civich]

Do you have the throttle set at maximum rpm?
As far as the lever will move, aka wide open throttle.

For maximum performance, HST drives need pressure, flow and cooling. Achieved by running the engine at maximum rated rpm.

I can see having it bog in H but not in M
H is only for low load travel.

This reply from wagne223 is the one to pay attention to. In High range on the road the HST drive needs the maximum rpm the engine is capable of - forget about linked pedal - it can't keep up with the demand in High range. Just keep that throttle lever pegged out - that is what works for me on my NX4510. If your hills are so steep you bog down even at max rpm then your machine is telling you it needs a lower range.

 

[Amvcane]

I will give you an idea of how high the hills are. One hill is 1 mile long and I am going from flat ground to 1300 feet to the top. 2nd hill is 1/4 of a mile going from flat to about 500 feet and there are a few not so high in between. Now if you can find a hill around your area that is close to the same height and distance then you tell me how your machine performs as I am curious.

My CK35hst would never make it up those hills in high range. Doubt any Hst tractor would. I do think that my tractor would make it up in medium range with maybe 1/3 Hst treadle input. Letting off the Hst when the tractor starts to slow down will not increase speed, only torque.
Assuming that the hill is a constant slope and starting from a dead stop in the middle of the hill in medium range. Slowly apply the Hst, the tractor will start to move. Slowly apply more Hst and the tractor will increase speed until it bogs down. Let off a bit till it no longer bogs down. This is the maximum speed you will achieve on that hill in medium. Applying more Hst will only bog the tractor down more.
Is the hydro fluid up to operating temp when this is happening? Also, I see you live up North. Have you chosen a hydro fluid based on the ambient temps that you will be operating in? For example, John Deere sells hyguard and low viscosity hyguard. I live in NEPA and because of the temps I will be operating in, I need to use the low vis hyguard or something similar. To high a viscosity fluid in your Hst would not help matters.

 

[radios1]

If the HST is operating properly and the operator is using it correctly RPM’s remain constant and ground speed varies.

that implies the transmission slips. compare that effect to a geared tractor, the transmission don't slip, and just bogs down the engine instead if you're in too high a gear.. automatic transmissions have been designed for decades without slipping but a tiny bit..

 

[LouNY]

that implies the transmission slips. compare that effect to a geared tractor, the transmission don't slip, and just bogs down the engine instead if you're in too high a gear.. automatic transmissions have been designed for decades without slipping but a tiny bit..

I'm not a fan of hydro's but I don't agree with this statement;
all of the hydro's that I have seen or worked on or used are pretty much the same,
it is a variable displacement pump feeding a hydraulic motor, the further the actuating pedal is depressed the more hydraulic fluid volume the pump pushes to the motor it takes horsepower to push that fluid, backing off the hydro pedal is the same as down shifting a transmission, the further the pedal is pushed the higher the effective gear.

 

[wagne223]

I'm not a fan of hydro's but I don't agree with this statement;
all of the hydro's that I have seen or worked on or used are pretty much the same,
it is a variable displacement pump feeding a hydraulic motor, the further the actuating pedal is depressed the more hydraulic fluid volume the pump pushes to the motor it takes horsepower to push that fluid, backing off the hydro pedal is the same as down shifting a transmission, the further the pedal is pushed the higher the effective gear.

The premise of your statement is correct, however, to avoid confusion on another topic, I would like to point out that "variable displacement " pumps are only used on closed center hydraulic systems.

Most tractors under 50 hp use open center systems with a constant displacement pump.

Again, just to avoid confusion on a topic that come up frequently.

To reinforce what you said.....

More hydro pedal equals more speed less torque
Less hydro pedal equals less speed more torque.