hydraulics

[bendrewjr]

Please tell me the difference between open & remote hydraulics I'm new to this game.( Kubota L 235 DT) Thank you , any and all coments .

 

[MadReferee]

I have never heard the term "open hydraulics". What you probably mean is "open center" hydraulics which means that the hydraulic pump is always pumping so the circuit must always be complete from the tank to the pump to the valves and back to the tank. Otherwise the pump will self destruct in less than one second as it tries to pump against a closed circuit. Your tracter is open center.

Remote hydraulic outlets, which is what I think you mean by "remote hydraulics" are hydraulic connections, usually on the rear of the tractor, that can be used to control implements that have hydraulic cylinders. There will be some method of actuating the rear connections, usually a lever located on the fender.

You can get plenty of info on this stuff by doing a search for "remotes" or "open center".

 

[qstott]

Speaking of hydraulics, what would you guys say is the most common size coupler for a compact tractor? My JD 1050 has 1/4". I was thinking 1/2" is more common. Is 3/8" used very often? And, do fitting brands have to mate? That is, does a Parker female coupler have to mated with a Parker male coupler?

 

[rambler]

I think the first question is 'open center' or 'closed center' hydraulics? Open is the cheaper, more common on small tractors type. The pump always flows oil through the lines, valves will shut off that flow & the oil is forced into the cylinders - so it is normally 'open center'.

A closed center type the pump always has full pressure, but varies the amount of oil flowing through the lines. When a lever is moved, it opens the hyd line to the cylinder.

Your pump & valves must match in type - many valves are convertable between the 2.


On farm equipment 1/2" is most common hose & connector size. I see a lot of 3/8" connectors on compacts. I see a little bit of 1/4" lines, but have never seen 1/4" connectors?????

For myself, everything goes to Pioneer universal style 1/2" connectors. But I have 7 tractors, and several dozen implements.....

You _must_ match styles of connectors, but can mix brands. Very important to see the stamped on numbers & match the style tho, there are a lot of styles out there. I would stiuck with the generic universal style.

--->Paul

 

[dieselmotorhead]

Yes parker needs to go to parker- pioneer to pioneer - etc. The 4600 rear remotes uses nominal 1/2 parker couplers Series 60 - maybe 3/8" hard to tell but the straight thread O ring size is 1/2 but the hard lines are 3/8. The power beyond is pioneer 1/2". I guess whoever was low bidder the day it was designed. I just upgraded the 1/4' couplers on the FEL ( third SCV ) on the hard lines to the same size as the rear remotes ( 1/2 or 3/8 ???). The number of ways to hook up hydraulic lines is boggling. Each MFG has ther own style for all the different product lines ( low pressure medium pressure high pressure, zero leakage etc) so no disconnects will go together unless in the same product and the ame MFG. The solid connections are even worse, Pipe thread, straight thread o ring, flat face o ring, flare and nut, not to mention metric flavors of all this. That is why I found a Parker store and am doing everything in parker. The dealer was not able to help with Hydraulics, the parts people just knew how to look up parts- I had to learn on my own

 

[3RRL]

dieselmotorhead,
</font><font color="blue" class="small">( I just upgraded the 1/4' couplers on the FEL ( third SCV ) on the hard lines to the same size as the rear remotes ( 1/2 or 3/8 ???).)</font>

Just curious, what did that do for you? Does it speed up the FEL or what?....other benefits?
Thanks,

 

[dieselmotorhead]

This was just for the third function. I have six hyraulic couplers for the loader on the tractor. Two ( a pair)come from the third SCV couplers next to the power beyond up to the FEL couplers via soft line. There are another pair for the TNT from the fourth and fifth valve in the back. All those couplers are parker H-63-T8 as supplied from JD One pair run down the loader arm to another set of disconnects on the end of a JD hardline at the end of the FEL arm. On the ends of the hardline are 1/4" snowplow connectors(pioneer) as supplied from JD. These run the curtis FEL mounted plow and the four in one bucket just fine. I will be getting a tree shear in june. The MFG reccomends 1/2" lines, 3/8" minimum. It has large volume cylinders ( 5") and the small 1/4" fitting would really cut into a good cycle time. Rather than change over couplers for that inplement only I changed them all over. The hard lines are 3/8", the valve looks small ( 3/8"?), the soft lines are 3/8", the couplers look to be nominal 1/2" (the parker H-63-T8). This is as fast as I can go without intalling a bigger valve and run bigger lines into the power beyond and down to the loader. Not worth it until I see a cycle time problem.