Cleaning up a Proportional Valve
Most of the crud is going to be found in the bottom section of the valve behind that 3/4" nut as its just about the lowest spot in the system and after 35+ years, it's just gonna collect there. After the nut is off, here is what you'll have:
You'll need a small needle-nose plier to GENTLY pull the plunger out. There should be a rubber grommet on the plunger. Sometimes, they stay stuck in the hole so you'll have to GENTLY pry it out and put it back on the plunger. Be careful as there is no new source for these that I'm aware of. Also inside the nut is a rubber grommet that I have no new source for. Gently pry it out and clean everything up (sorry for the lousy pic):
Next, take a 5/8" wrench and remove the switch:
Most of the crud is going to be found in the bottom section of the valve behind that 3/4" nut as its just about the lowest spot in the system and after 35+ years, it's just gonna collect there. After the nut is off, here is what you'll have:
You'll need a small needle-nose plier to GENTLY pull the plunger out. There should be a rubber grommet on the plunger. Sometimes, they stay stuck in the hole so you'll have to GENTLY pry it out and put it back on the plunger. Be careful as there is no new source for these that I'm aware of. Also inside the nut is a rubber grommet that I have no new source for. Gently pry it out and clean everything up (sorry for the lousy pic):
Next, take a 5/8" wrench and remove the switch:
