Hydraulics Question

   / Hydraulics Question #1  

Gurney10

New member
Joined
Feb 19, 2009
Messages
19
Location
Pikeville, TN
Tractor
Mihindra 4500 4WD, 2003
Can someone explain (in laymans terms) the basic difference between an open center and a closed center hydraulic system?
 
   / Hydraulics Question #2  
I'm no hydraulics expert but I am a layman so I'll give it a go.

In an "open centre" hydraulic system the centre or neutral position for the valve/s allows the oil from the always delivering pump to flow straight through the valve and back to the reservoir at little or no pressure.

In a "closed centre" system the centre position will block the flow from the pump, the pump senses this and turns off the flow. When a valve is activated, the pump also senses this and restores the flow, allowing the valve to send the oil to the cylinder or motor.

Can't comment too much on a closed centre system as every tractor I've had was and is open centre.
 

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