Re: Hydraulics 101

Posted by used red mn on April 24, 2020 at 11:34:28 from (75.73.112.20):

In Reply to: Re: Hydraulics 101 posted by JMOR on April 24, 2020 at 07:15:55:

Mark, since you are posting this as ...Hydraulics
101...let us explore this in a little more depth. Now
some people don’t like a poster that adds this
disclaimer, but I don’t know anything about the
specific valve set up in that Ford. My answer will be
based off general knowledge that applies to open
center hydraulic systems. So, if JMOR is referring to
the fact that he knows the valve set up on your tractor
then the following applies. If you use it as described
by TxJim, when moving your control lever to the
position which would allow the cylinder to retract or I
assume lower the mower head you will be forcing full
hydraulic pressure against the unused remote outlet
of the pair connected to the control valve you are
using. This will pressurize the piping or hose to the
unused coupler and cause the hydraulic system
pressure relief valve to open. And in that position the remote your cylinder is plugged in will allow oil to flow back to the reservoir as if it were allowing oil to return from the unpressurized side of a double action cylinder. And doing this will work but it will put undue stress on
the hydraulic pump and drive, pressure piping, relief valve and
will heat the hydraulic fluid. The only way to operate a
single acting cylinder on a two way remote valve is to
add a hose plugged into the opposite remote outlet
that flows oil back to the reservoir as Deltared has
proposed. Now if your valve setup has a
...float...feature then this would allow you to use the
single action cylinder as well. A float position control
valve generally has fourth additional position beyond
the ...down... position JMOR describes that opens the
line of the remote outlet to the return reservoir
allowing the cylinder to float or move freely as the
implement encounters changes in terrain etc. Having
a float position would allow you to return oil back to
the reservoir or lower the machine without the
pressurization I spoke of earlier. The other way is to
have a switchable valve, some Farmalls had this
feature. Another option that in my knowledge
generally does not apply to factory equipped valves is
there is an internal plug to remove to switch the valve
from double to single action. This is generally found
on add on valves. Hope this helps.

Replies:

Add a Reply! You must be Logged In to Post Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video Embed: Advanced Posting Options Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks. No political comments, hate speech or bigotry of any kind will be tolerated. Violations will be removed and posting privileges may be permanently revoked without notice.   Advanced Posting Tools   Select Gallery Photo  Attach Serial No List  Return to Post  Upload Photos/Videos Choose Files from your local computer Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]