Winterizing a hydraulic system

Discussion in 'Irrigation' started by Michdeere, Aug 1, 2012.

  1. Michdeere

    Michdeere LawnSite Member
    Posts: 90

    I know it's early, but I have a winterization question. I took on a site this Spring with an older Toro hydraulic system. It's a lake fed system. There is a 1/4" line tapped in just downstream from the pump that feeds the electric/hydraulic manifold. Eventually, all of the water will be forced out of this 1/4" line. Will I still be able to cycle through all 12 zones without water feeding the valves? Thanks for your input.
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,038

    You don't know what's what until you see the zone valves
     
  3. Michdeere

    Michdeere LawnSite Member
    Posts: 90

    I know that of the 11 total valves, 2 are electric. The rest are hydraulic. What am I missing? Thanks!
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,038

    you are missing knowledge of the zone valves - some cannot be fully winterized, not for a billion dollars
     
  5. irritation

    irritation LawnSite Gold Member
    Posts: 3,278

    I still have 6 or 7 hydraulic systems. 2 are on lake pumps but they have a separate clean water supply for the hydraulics. Leaving the hydraulic supply on during blow out works ok but you need to disconnect the supply tubing after you blow the pipes out and go through it again, all zones will come on and you will have no pressure but it's enough to clear the tubing of water.

    Systems that supply both with the same water source are a ***** and you pretty much need to open each valve manually, if you can find them.

    How do have electric valves on a hydraulic system?
     
  6. irritation

    irritation LawnSite Gold Member
    Posts: 3,278

    Sorry, missed that part.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,038

    Thing is, Toro made a cylindrical glued-together version of the hydraulic valve, and it has no bleed screw. If said valve was to be the NO (normally open) version, instead of the pin-type version, then there would be no way to get winterizing air into the control line to the valve.
     
  8. irritation

    irritation LawnSite Gold Member
    Posts: 3,278

    They are a pain and should be upgraded. The original landscape design has totally changed by now.
     
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,038

    Anyway, as long as you got some constant air pressure to the controller, at a pressure greater than that of the blowout air, the valves and controller will work. If you slack off on the pressure feeding the controller, all the hydraulic zone valves will immediately open.
     
  10. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,076

    Ditto, I'm suprised that they are still in "service".
     

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