Rain Bird Maxi-paw

Something could be binding it. You are better off just getting a replacement. Its usually about $16-$20 in HD,Lowes or Ace. You will need the special Rain-Bird wrench to remove it.

RainBird's website has info, but it looks like you might need an engineering degree:

Thanks. That was one of the reasons I asked here. Thought maybe someone would be able to translate. (grin). Thanks for trying.

Short answer: Take off the top & suck any debris with a shop vac. Remove any grass, etc from housing. Give it a try. If it still doesn't work, try moving the spring restraint point to make less spring force (ie unwind the spring, a notch)

Long Answer:

A house I used to own had Max-Paws for lawn sprinklers. At one point, units started to "fail" (exhibit pop-up behavior but wouldn't swing, advance or return). I found, at least in my yard, that grass growing into the housing, accumulated dirt & silt or corrosion of the weights were often the cause.

ign has changed.