dcyrilc
Elite Member
By CC, I presume you mean closed center. Is this true and do you know the difference between closed center and open center hydraulic systems?
If not where did you get the CC requirement from?
Once these questions are answered we can go on to these.
What do you want to do with this valve?
How are you going to plumb it in?
Roy
Yes, my JD 2240 has Closed Center hydraulics. Open Center is Constant Flow & Closed Center is Constant Pressure usually with a variable displacement pump.
Initially, 3 valves will be for T&T with tilt control on both sides. 2 additional valves will be for future rear remotes.
The pressure line will be plumbed from the (currenly plugged) factory port on the priority valve where factory rear remotes are plumbed from. The return can be plumbed back to the filter or to the resivior or both. Factory remotes are plumbed to the filter with an optional kit allowing a split return to both the filter and resivior.
I plan to use stack valves to create the configuration I want, however this post came about when I began looking at valves and was lost in the abbreviated names of the valves. IE:SVS1GA1AA (DA CYL SERIES SPOOL SPRING CENTERED) $114.00 & SVW1BA1 (DA CYL SPOOL SPRING CENTERED) $67.00. I've yet to figure out the difference between these two valves. I guess it comes down to that I don't know what a series spool is. Both of these are listed under 1 SPOOL SV CLOSED CENTER NO RELIEF in the area for stack valves on Surplus Centers website.
I started this thread because I realized that I didn't know terminology well enough to properly understand what the valves were that I was looking at by the descriptions. I've figured out some of the abbriviations, such as SA - Single Acting, DA - Double Acting.
After realizing the short commings in my understanding of terminology, I decided to start this thread both for my own knowledge and also so that others can learn as well.
I realize that nearly all newer tractors are Open Center, so the plumbing requirements for my tractor will be different from most of what is dealt with here on TBN. I don't plan to get into exact plumbing plans here as this thread is for education of terminology rather the actually plumbing my machine.