I replaced a load of old rainbirds with nelson 6000 rotors. shortly thereafter a load of silt got in the system from well work done at the business. many of rotors now stick up and many don't rotate. Can these be cleaned out and re-used or are they history. We're talking 40+ rotors. JB
Unscrew the cap on the case and take the rotor assembly out. Pull the bottom filter off and flush the inside of rotor out with a hose. There is a plunger in the bottom of the rotor (you can push it up with your finger). Make sure there is no sand holding the plunger up. This is a bypass for the motor. If it is held open with sand it will not rotate because water is bypassing the motor. Once flushed out, clean cap and seal, insert rotor back into case (be careful that no debris falls into case) screw cap and seal back on and you're ready to go.