Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
General Skidsteer & Technical Topics
Attachments
Hydraulically-driven PTO shaft
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support SkidSteer Forum:
Message
<blockquote data-quote="thetool" data-source="post: 22581" data-attributes="member: 1534"><p>There is a formula for calculating hydraulic hp from flow and pressure. Problem is, the pressure is changing all the time, depending on the load, so it's nothing more than an acedemic exercise. If you do the numbers based on rated flow and relief pressure, you may find that the hydraulic hp is more than the rated hp of the machine.</p><p>You are never going to have more hp than what your engine is putting out. And on the most efficient hydraulic systems, about 20% less, somebody check me on that.</p><p>This is very important to keep in mind if you're going to mount an attachment that is designed to be pulled by a tractor, and turned by a 540 rpm pto, to the front of a skid-steer, and operated by a hydraulic motor that emulates a pto.</p><p>With a skid-steer, capable of putting a lot of down-pressure on the attachment, this changes a lot of things relative to how to set stuff up on skid-steer or tractor attachments.</p><p>Especially with high-flow machines, the rated flow and relief pressure can mislead a guy into thinking he has all this hydraulic hp available, and he does not.</p></blockquote><p></p>
[QUOTE="thetool, post: 22581, member: 1534"] There is a formula for calculating hydraulic hp from flow and pressure. Problem is, the pressure is changing all the time, depending on the load, so it's nothing more than an acedemic exercise. If you do the numbers based on rated flow and relief pressure, you may find that the hydraulic hp is more than the rated hp of the machine. You are never going to have more hp than what your engine is putting out. And on the most efficient hydraulic systems, about 20% less, somebody check me on that. This is very important to keep in mind if you're going to mount an attachment that is designed to be pulled by a tractor, and turned by a 540 rpm pto, to the front of a skid-steer, and operated by a hydraulic motor that emulates a pto. With a skid-steer, capable of putting a lot of down-pressure on the attachment, this changes a lot of things relative to how to set stuff up on skid-steer or tractor attachments. Especially with high-flow machines, the rated flow and relief pressure can mislead a guy into thinking he has all this hydraulic hp available, and he does not. [/QUOTE]
Verification
Post reply
Forums
General Skidsteer & Technical Topics
Attachments
Hydraulically-driven PTO shaft
Top