This site uses cookies to maintain login information on FarmallCub.Com. Click the X in the banner upper right corner to close this notice. For more information on our privacy policy, visit this link:
Privacy Policy

NEW REGISTERED MEMBERS: Be sure to check your SPAM/JUNK folders for the activation email.

Hydraulics

All non-Cub/Cadet/IH/Farmall/Case tractor and machinery discussions.
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
User avatar
birddog
10+ Years
10+ Years
Posts: 505
Joined: Fri May 05, 2006 12:00 am
Zip Code: 54515
Circle of Safety: Y
Location: WI, Catawba

Hydraulics

Postby birddog » Wed Oct 17, 2012 12:59 pm

Is there any thing I would have to do to hook a single acting cylinder to a 2 way control valve in order for it to work properly?
Mark "birddog" Birdeau
Circle of Safety

SPONSOR AD

Sponsor



Sponsor
 

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 20344
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Hydraulics

Postby Eugene » Wed Oct 17, 2012 5:19 pm

The answer depends on the capabilities of your control valve. The valve must be able to charge the hydraulic cylinder, hold, drain the hydraulic cylinder. And the big problem, a relief system to "unload" the pump so as not to dead head it when in the hold position.

This circuit is not often used with hydraulic rotary pumps because it will not unload the pump while holding the ram.
Industrial Fluid Power, Womack. 1996
I have an excuse. CRS.

Landreo
10+ Years
10+ Years
Posts: 1172
Joined: Tue Oct 19, 2004 7:10 am
Zip Code: 29130
Tractors Owned: fcub(5)
tricycle cub
154 (4)
Earthmaster (2)
JD 40T, JD 420 crawler-loader, JD MT
JD Unstyled A, Styled A, Unstyled AR
JD H
Centaur Tractor
AC Model C, G
Cub Cadets (9)
Gibson D
Red-E
Circle of Safety: Y
Location: SC, Ridgeway

Re: Hydraulics

Postby Landreo » Thu Oct 18, 2012 8:58 am

For a standard open center valve:

The return or "T" port goes to the tank as always, the inlet or power line is the same as always. The outlet port for the direction you want on the handle goes to the cylinder. The difference is the other unused outlet port on the valve goes to the tank similar to the return line. Separate this line from the real return line so they connect at the tank or at least far downstream. If you connect the two lines by a short line at the spool valve, the unused outlet may back feed into the return line.

When activated, the outlet goes to the cylinder and raises the cylinder, the unused outlet port would normally act to return the opposite side of the cylinder and go to the return line. You already connected to the return at the tank so the result is the same. Pull the handle to lower the cylinder, the outlet port for that cylinder then goes to the return outlet as always. The unused outlet is now activated to raise a nonexistent cylinder so it needs to go somewhere, that is why it is connected to the tank otherwise it would deadhead.

User avatar
birddog
10+ Years
10+ Years
Posts: 505
Joined: Fri May 05, 2006 12:00 am
Zip Code: 54515
Circle of Safety: Y
Location: WI, Catawba

Re: Hydraulics

Postby birddog » Thu Oct 18, 2012 5:40 pm

Thanks Eugene and Landreo.

Landreo, after reading Eugene's post earlier today I got to thinking about it and thought I would have to tee into the return. I had wondered though about the back feed problem, but didn't think about the fact that it may be less likely if connected further down stream. I would think when teeing in it would be best to run the working port straight threw and come from the side with the return port. Right? Also if I could find one, I would guess that a y would probably be better then a tee.
Mark "birddog" Birdeau
Circle of Safety


Return to “Other Tractors and Machinery”

Who is online

Users browsing this forum: No registered users and 6 guests