Truck hydraulic system help

[seasidele]

Let me start by saying sorry for posting in tractor forum for a truck byt had no where else to turn and thought someone in here might help. I have a truck I built that has a hook lift hoist on that has 2 rams one runs the hoist and one runs the hook. I put on a clutch pump on the motor, and put together an electric directional valve block. I started with closed center spool valves which when i hit the switches the rams would work but when I let off the belt would slip because the pump was backed up and couldnt release the prssure. So i switched to open spool valves which it you run one ram at a time won't do anything because the pressure and flow is escaping through the other valve. If I run both at once they work but that isn;t going to work. How do I setup valves in a open system that has constant pressure but can run one valve at a time that I wont loose pressure or flow?
Any help is much appreciate or to be pointed in the right direction.

Thanks
Dylan

 

[2458n]

You need to run something like they use for a front loader. pressure in and two handles or joystick and pressure out. Each handle will have two lines going out to your chosen cylinder. You can feather it and run the hook and hoist at the same time.

 

[Tx Jim]

Sounds as if you have the open center valves teed into system while they need to be attached in series with pump oil running into 1st valve continuing to 2nd valve then oil returned to tank.

 

[CJONE]

tx is on the right track. Sounds like the valve is set up in parallel and you need to get a series bank. Most mobile equipment is set up in series. Unless using a pressure comp pump, your belt drive is more than likely a PD or gear pump. CJ