Newb with questions about my new 1450

[drglinski]

You have a very nice 1450. Not too sure about the color of the tiller however.... but that's easily changed.

[Maxwelhse]

Originally Posted by jimbob200521

Hydraulics are very efficient at transferring power and lifting loads.

Indeed... I believe it's something on the order of 95% efficient.

Originally Posted by jimbob200521

I wouldn't use it to jack up the front of ur car, but lifting the front of a Cub is very doable, I've seen guys do it.

I would... It's either going to lift it or not. If it doesn't, then let off the stick! Jack stands are the most important function of working under something no matter how it got lifted to start with,

Originally Posted by jimbob200521

As for power to wheels, how's this; you'll run out of traction long before you run out of power.

Exactly and absolutely correct! Traction has always been my biggest limit with a cub.

[ACecil]

Welcome to OCC! You have a nice 1450.

[braxx]

Ok so I found specs on the Sundstrand 15 hydro unit. It will put out up to around 15hp and 28ft-lb of torque. This is dependant on input rpm. I read that it can run at 4000rpm sustained.

[J-Mech]

I don't really know what you are looking for..... the transfer of HP through any transmission results in a loss of HP. Hydrostats are approx 86% efficient (IIRC). You really aren't going to notice any loss of HP because you will lose traction before you lose power. Yes, the hydro can handle 4000RPM sustained, the motor on your cub should be running 3600RPM. Here is a thread from our technical section with a simple explanation on how hydro's work: Hydrostats: How they work. Here is an article on the efficiency of the hydrostat and the mathematical equation used to calculate it. HYDROSTATIC DRIVES. Hope this helps! Welcome to OCC!

[braxx]

Originally Posted by J-Mech

I don't really know what you are looking for..... the transfer of HP through any transmission results in a loss of HP. Hydrostats are approx 86% efficient (IIRC). You really aren't going to notice any loss of HP because you will lose traction before you lose power. Yes, the hydro can handle 4000RPM sustained, the motor on your cub should be running 3600RPM. Here is a thread from our technical section with a simple explanation on how hydro's work: Hydrostats: How they work. Here is an article on the efficiency of the hydrostat and the mathematical equation used to calculate it. HYDROSTATIC DRIVES. Hope this helps! Welcome to OCC!

Thank you for the links.
What I am getting at is, there really is no reason to repower with 24HP over 18hp as the Hydro unit will only transfer around 16hp to the transaxle. I guess if for some reason you needed the full HP available at the tires AND some reserve HP for belt driven items you would use the higher HP engine. Although I can't really think of needing max traction HP and PTO belt power at the same time. Usually you need the traction HP for dirt plowing and snow plowing but you don't need any additional PTO belt power for either one.
I'm fairly well versed in hydraulics and hydraulic applications that is why I know that regardless of 20hp input or 30hp input the hydro unit will only put out an amount of power directly related to the maximum - pressure/flow/rpm of the pump.
What I found is that the hydrostatic unit is rated at 2500psi continuous. The hydrostat unit also has output torque of 135in-lb for every 1000psi. So 2500/1000=2.5, 135x2.5=338in-lb or 28ft-lb of continuous output to the transaxle.

Next I will figure out the hydraulic lift capabilities.

[J-Mech]

I don't know where you got your figures from.....but that sounds about right. 28ftlbs output at the hydro, after gear reduction, is approx 740ftlbs of torque at the rear wheel. So, yeah, that sounds about right.

So, if you knew the answer....... why did you ask?

[cubcadet]

nice 1450

[braxx]

Originally Posted by J-Mech

I don't know where you got your figures from.....but that sounds about right. 28ftlbs output at the hydro, after gear reduction, is approx 740ftlbs of torque at the rear wheel. So, yeah, that sounds about right.

So, if you knew the answer....... why did you ask?

I didn't know the answer. That's why I asked and when I didn't get a good answer I decided to figure it out myself.
Just like it looks like I'm gonna have to figure out the actual lift capacity of the hydraulic lift.
I would of thought that that info would of been published.