Thanks Charlie...and everyone else. I'm going to purge the fluid first, replace the reservoir and tube, then start the refill process. Hopefully the tank and hose will come in today so I can flush this weekend. 🤞
I just did this a few days ago on my 2011 LX (also did oil + filter, ATF, AT magnefine filter, after my wife returned from a 400 mile drive). In case it helps ...
I do this, with Genuine Honda PSF about every 30k miles. Takes up to 3x 12oz bottles.
I did not replace the reservoir (never have on any car) - you should never ever use gasoline as a solvent for a number of very good environmental and safety reasons, but just in case some gets in your PSF reservoir, it will certainly clean it and leave it like new. Just saying. Also keeps your money in your wallet and plastic out of the land fill.
I had the car jacked on jack stands (mostly due to the other work, but helps with the steering left-right cycling)
Used my 7-liter mityvac suction thing to suck out the reservoir
Then with my son cycling the steering back and forth (key in to disable steering lock, but of course engine never runs until all finished), more fluid would enter the reservoir to be sucked out.
When no more fluid was coming out while steering, disconnected hoses (put a paper towel down below to catch anything, but no leak at all), removed reservoir.
Gasoline in reservoir to dissolve and clean like new. Washed out with soap and water. Rinsed with water. Set in sun to dry completely while doing all the other work.
Reinstall, fill, steering back and forth until no more can be poured in.
Start engine, steering back and forth, top up. Done.
I surely could have got a little more of the old fluid out by disconnecting something below, but for me, doing it at this 30k interval, it is easy, cheap, and keeps the fluid very clean.
As I do with the Magnefine on the ATF, I put one on the PSF many years ago (same exact filter). Magnefine confirmed it would be fine and that a 50k mile change interval would be fine. I changed it at about 50k after installing, opened the old one up and found it to be almost perfectly clean (and nothing at all on the magnet), so I have since extended the Magnefine PSF change interval to 500k miles.
The whole PS system on my '99 EX was still original and probably the best thing on that car when I sold it at ~240k miles.