Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
Scupper

hydro-static?

2 posts in this topic

Could someone explain how Hydro-Static works. blush.gif

My brother has an old Cub Cadet lawn tractor with hydro static controls. He wants to make a log splitter and was wondering if he could use any of these controls to complete his project.

Thanks for any information or advise.

Share this post


Link to post
Share on other sites

This could be a long discussion....

Essentially, a hydrostatic drive is a variable displacement hydraulic pump connected to a hydraulic motor. Sometimes the motors are also variable displacement. So, within the range of the pump and motor displacements, you have variable speeds without really changing gears.

The hydrostatic pump starts in neutral - ie, not pumping any fluid. The displacement control causes the pump swashplate angle to increase at the operator command and pump more fluid. More fluid pumped to the motor, the faster you go. Sometimes you have a variable displacement motor so you can also have like a high and low range (bang-bang two speed motor) or a fully variable motor for an even greater range of speeds. For example as the pump displacement is increased to maximum speed is gained, then when the pump is maxed out, the motor displacement is changed from maximum towards minimum giving yet more increase in speed.

EDIT: Had to run and cut short.

Now, in hindsight, a hydrostatic theory of operation really does you not a lot of good. Without much knowledge of what's going on in a Cub Cadet, my first reaction would be that it's probably not suited for log splitter. The main reason that comes to mind is that hydrostatic systems are typically closed loop circuits in which the majority of the fluid circulates from the pump though the motor and back to the pump with a small percentage intentionally bled out of the circuit for cooling and filtering. If you were to drive a hydraulic cylinder, there is not really circulation of the fluid which I think would eventually (and quite possibly in short order) cause some problems for the pump.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • Mitch K
      4-6" of snow this weekend on top of our new ice hopefully the cold snap early next week will keep making ice through it and we don't end up with the slushy mess of last year.
    • mr.mjc
      There is a lot of my fishing friends and captains talking about this new app called fishangler. The app is giving away$$$$ for 2016 cool fish pics. Has anyone heard of it and what do you think?
    • Stick in Mud
      I was thinking the same thing.  Given the forecast, it should get locked up sooner rather than later.    Of course, it *was* nice to get out fishing last week in the boat.  First time I can honestly say I've fished the lake in a boat in December.  And if the quality of the fishing last week has anything to say for it, it's going to be another amazing year on the lake. There'll be plenty of fish caught, that's for sure.  
    • ZachD
      Thanks for the updates
    • Kelly Oman
      Little elk in zimmerman was locked up this morning as well as orono