medic0648
Gold Member
You need a +20gpm valve that is closed center to work on that tractor. If you may need additional hydraulic functions in the future and have to get another valve I'd recommend upgrading if you can while you're at it.
Farmerford,
New guy here. Retired electronics tech and agree, hydraulics is a lot like an electronic circuit. I read with GREAT interest your explanation regarding "open/closed" center valves (spools) (bear with me here I'm still learning the ropes)
I have a JD401-C loader and 3 point hitch. The bucket and lift valves are of the "closed" type. (I have the manual) I am trying to adapt an "auxiliary" valve to control a grappling hook on my bucket. No joy so far. I tried 'inserting' my GB (grappling bucket) valve in 'series' with the bucket valve and while the bucket would work ok the GB did not. I believe the GB valve is of the 'open' center type. (when I pump compressed air into the feed ports and switch the lever to either an up or down position, air freely blows through those ports. Then when in neutral air goes in and then out through the hi side and the low side ports)
At this point I'm not sure of what question to ask next other than I would like to weld a plate just above my bucket valve and mount my grappling hook 'gadget' to my bucket in order to pick up tree limbs etc..) HELP, please.
You need a +20gpm valve that is closed center to work on that tractor. If you may need additional hydraulic functions in the future and have to get another valve I'd recommend upgrading if you can while you're at it.
OK, so now I'm getting a little more 'up to speed' regarding these valve types. I guess with some compressed air going into the "in" port what should I be looking for with the results I get? And with this information can I then determine "what" sort of valve I do, in fact, have in my hand?
Bottom line is this: In testing a valve with compressed air "what" are the results for each valve type, (open or closed)?
I really do appreciate all the info here from you guys, makes life a LOT easier.
hydroholic
Sandbar w/fl