I got myself in a position where I needed a power bleeder ASAP. Nissan dealership wanted $125, but didn't have any openings. All the other shops used a vacuum system and $80. I wanted the Motive power bleeder, but shipping it would not get here in time.
I found a couple good articles online about building your own, so I spent $50 in parts and built my own in less than 1 hour. (parts not including step up drill)
The main components:
Bleach sprayer, designed for harsh chemicals
Ford Master Cylinder Cap and Gasket purchased from AutoZone. It looked nearly identical to mine, I wonder if previous owner replaced it?
Tire pressure gauge with pressure release button. I removed that leaving me a standard Brass Fitting that I could match up with at Home Depot
I started with the reservoir cap. 5/8" hole matched with a 1/2" ID rubber grommet. The brass barb looks overkill. It matches the large the tubing I chose which slides perfectly over the sprayer wand.
The fitment was so snug I bet I could have gone without this coupler fitting being used as a nut. Better safe than sorry.
Modern reservoir caps have slots that allow air to slowly move in and out of the reservoir to allow for pressure equalization. I used 5 minute epoxy to fill those slots. Since I would have to place the gasket into the cap while the epoxy was setting, I went ahead and added a thin ring of epoxy all the way around the cap for the gasket to ensure a good seal.
I didn't take a picture of the fast setting epoxy, but here's a picture of the gasket. I installed the cap onto the vehicle's master cylinder reservoir before the epoxy set.
I had hoped to use another rubber grommet in the tank itself, but the side walls proved to be too thick.
Thankfully I had bought some other rubber washers as a backup plan.
Add a little Teflon tape
The subsequent bleeding was the easiest I have ever done. Cool thing is, with the generic cap, who knows how many other vehicles this could work with. And making new adapters for other vehicles will be a cinch.
I recommend buying the Motive power bleeder. I spent almost as much money and who knows how long the sprayer wand internals will hold up against brake fluid. But, it worked for me and I'm really happy about that.