KUBOTA REAR REMOTES
- Thread starter MATTS875
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not to sound stupid!! But I AM!! What do you mean by a rear remote? And how is that different from a "Power Beyond Valve"?? I was told I need a power beyond valve to run my demolition hammer when connected to the back-hoe. I have a 2001 L35 TLB. I have had my hammer for 2 years and cannot get the dealer to order the power beyond valve parts. He says he has no idea on what to order!!!
From what I can figure it is just the outside housing (output side) of my controle block (for the hoe), that diverts the oil diffrently than what is there now.
Unfortunatly I don't need the hammer anymore (hired the work out, couldn't wait)
but I'd still like to either figure it out or sell it
From what I can figure it is just the outside housing (output side) of my controle block (for the hoe), that diverts the oil diffrently than what is there now.
Unfortunatly I don't need the hammer anymore (hired the work out, couldn't wait)
but I'd still like to either figure it out or sell it
kennyd
Advertiser
Your remotes are "open center", not closed center.
kennyd
Advertiser
Not stupid at all...but it sounds like your dealer may be. "Power Beyond" is just a way of plumbing remotes, it's not a "valve". The PB is basically a constant flow of hydraulic oil whenever the tractor is running and is used to power things that have their own valves like backhoes and logspliters.
I am not sure of the requirements for a hammer, or what machine you have...but if you give some specific details and links to what you have (maybe start a new thread?) I am sure we can help.
PHILIP8N
Veteran Member
Okay, educate me. I have a double acting hydraulic cylinder, top link, blade angle, etc. I move the have handle to extend or retract cylinder. Cylinder stays in that position until I move valve handle again. That is why I say closed center, because cylinder holds position. So where does the terminolgy open center come from? Thanks. Philip.
tutorbell
Bronze Member
In open center valves, hydraulic fluid flows through the in and out ports when the valve is in neutral. In closed center valves, flow between the in and out ports is blocked when the valve is in neutral. In all cylinder valves, open or closed center, the cylinder ports are blocked when the valve is in the neutral position. In motor valves, the fluid is free to circulate between the work ports when the valve is in neutral, allowing the hydraulic motor to coast.
Chilly807
Elite Member
The term "closed center" refers to a valve that is "closed" when the handle is in the neutral position. Usually any system that uses these has a variable displacement hydraulic pump, such as a swash plate type pump. Otherwise, any flow the pump creates goes over the relief valve when it's not being utilized. A waste of power and generation of heat.
Your valve is "probably" open center, which allows the flow to go through the valve when it's not being used. When it's in the neutral position, normally the work ports going to the cylinder are blocked, holding the cylinder in place. A motor type valve spool is different in most cases, it may allow the motor to freewheel when the valve is in neutral.
Typically tractor hydraulics are a series system, which means as fluid leaves one valve it goes to the next in the chain, etc. Any parallel circuit will have to have it's own pump for each valve, otherwise the fluid takes the path of least resistance. The only part of the circuit that can be parallel is the "tank return" which is usually not pressurized or expected to perform any work.
You've noticed I used the words "normally", "may", and "some". That's because there are always exceptions to the "rules", correct or otherwise. There are some oddball cases out there, usually hooked up by someone that had their heart in the right place, but wasn't competent to design a system.
Your mileage may vary, I'm no expert either..
Sean
Your valve is "probably" open center, which allows the flow to go through the valve when it's not being used. When it's in the neutral position, normally the work ports going to the cylinder are blocked, holding the cylinder in place. A motor type valve spool is different in most cases, it may allow the motor to freewheel when the valve is in neutral.
Typically tractor hydraulics are a series system, which means as fluid leaves one valve it goes to the next in the chain, etc. Any parallel circuit will have to have it's own pump for each valve, otherwise the fluid takes the path of least resistance. The only part of the circuit that can be parallel is the "tank return" which is usually not pressurized or expected to perform any work.
You've noticed I used the words "normally", "may", and "some". That's because there are always exceptions to the "rules", correct or otherwise. There are some oddball cases out there, usually hooked up by someone that had their heart in the right place, but wasn't competent to design a system.
Your mileage may vary, I'm no expert either..
Sean
