Hello,
The PGP is by far the best rotor you can buy, and they are much more easier to replace and install then you think. To take out the nozzle you can unscrew the radius adjustment screw (not all the way) and turn the water on. The nozzle will pop-out and you can see what size it is. A rack of 12 nozzles comes free with every PGP sprinkler. To install these, unscrew the old head, and realace the new one, by screwing it in. You can adjust the heads from there. The nozzle have a number on them, so make sure that the nozzle you use is the same one. There is another way to take out the nozzle. Unscrew the head, and take out the inner riser push down, and pull the nozzle out with twezers. Wait to put the nozzle in the new head, until the system is turned on and flushed with the new ones in, that way your nozzle wont clog.
Hope that helps
Ray
Rays Above and Beyond Automatic Lawn Sprinkler
www.hunterindustries.com is Hunters website, and they have plently of info to help
Raymond Padula Jr.
Thanks
Ray
Rays Above and Beyond Automatic Lawn Sprinklers