Problems with Rainbird's Maxipaw

Discussion in 'Irrigation' started by dbsoccer, Jul 16, 2008.

  1. dbsoccer

    dbsoccer LawnSite Member
    Posts: 28

    I have a 30x60 rectangle with Maxipaws in all four corners on one zone and two others half way down the 60' side of my rectangle. These are on a second zone. The two zone head works fine. But three heads on my four corners don't cycle properly. They stick part way though. One of the four works fine and it does not matter where in the zone I move it - it works. I'm using the 07 nozzle on all four. I have 08s on the two center ones.

    My pressure may be marginal. I read about 38psi at the PVB. It is very close to the yard area and everything is in either 1" pvc or 1" poly.

    How is the best way to measure pressure at the head?
    Would it help to replace the bearings? I see Rainbird has a kit available.

    Somewhat related.... what is the vane for? I see a diffuser behind a couple of the nozzles but not all of them. What is this for? Could this be any part of the problem?

    Thanks.
     
  2. Waterit

    Waterit LawnSite Silver Member
    Posts: 2,888

    Rather than going through the trouble of pulling the heads and repairing them, just replace them.
     
  3. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    But there could be another problem such as a leak or kinked or pinched pipe.

    That pressure sucks.
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,971

    Make sure the arm springs are adjusted for low-pressure operation. That's why you can move the hooked end of the spring, to reduce the tension.
     
  5. dbsoccer

    dbsoccer LawnSite Member
    Posts: 28

    Hey thanks for all the great replys. Wet Boots.... you've peaked my interest. The one head that works cycles slower than the other three. I thought it may be missing a weight or had weak spring. Tell me more about the spring and how to adjust it. I could just buy new but that may not fix my problem. I'd like to measure the pressure at the head. I see elsewhere I can do that with a pitot tube hooked to a pressure gauge.
     
  6. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,971

    Forget the measurements - just adjust the arm springs. They don't come from the factory set for low pressure.
     
  7. dbsoccer

    dbsoccer LawnSite Member
    Posts: 28

    Could you explain better about the springs. I haven't messed with them at all.
     
  8. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,971

  9. dbsoccer

    dbsoccer LawnSite Member
    Posts: 28

    Wet Boots. Thank you. I was on the phone with RainBird today for about 30 minutes. I would have thought they would have offered what you just did. Very much appreciated. Have a beer on me.
     
  10. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,971

    don't mind if i do :drinkup:
     

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