They discontinued them probably 10 years ago. If I remember correctly they were only in production for 5 years or less. The company I currently work for installed thousands during this time.
The plunger I refer to in the selenoid is encapsulated. However the plunger is extremely susceptible to debris. Take the selonoid and shake it, if you hear a rattle sound coming from it, you're probably ok. If not, the plunger is more than likely sticking.
When it comes to servicing flo-pro valves, I always replace the diaphragm and selonoid. It's the only way to insure 100% reliability for the season.
If using Mr. Fixit's diagram, more than likely you are only concerned with parts 2, 3, 6, 7, 11, 12, and 13. The majority of the other parts are for flow control and anti siphon models.
This post has been edited 1 times, last edit by "Central Irrigation" (Oct 2nd 2010, 10:23am)