Graco Heat /AC raw water pump.
We’ve used the heat and AC unit over the past two days but this morning shortly upon turning it on I heard a vibration. I went below and determined it was coming from the raw water pump. I shut the valve off and attempted to take the butterfly nut holding the strainer in place off so I could clean the strainer. That has been a challenge I ultimately decided to not force until I could get some opinions. No telling how long it’s been since it has been removed but I can barely budge it. I’ve sprayed it with W 40, I’ve used vicegrips I’ve tapped on it numerous times with a hammer. No Joy. I do see it appears to be shifting down but I would have expected it to come straight off once the nut is loose? Maybe I’m wrong. Should I keep tapping and trying to dislodge this? Pictures below may help.
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