Bench bleeding a Clutch Master cylinder

[Trotbags]

Finally getting around to replacing the clutch master cylinder on my 90 SW20 N/A. It has been recommended to bench bleed the master cylinder before fitting it. I've googled and have a basic understanding of what's required - with the cylinder out of the car, I'd fill the reservoir up, attached a fitting to the outlet on the master cylinder, attached a clear plastic tube that feeds back into the top of the reservoir and cycle the cylinder until air stops coming out. I'm a bit stuck on what fitting to attach to the outlet on the master cylinder - is it just a normal bleed nipple or is there something better I should use? If the usual parts places were open I'd just head down and grab something that fits. Any advice appreciated. Thanks.

[GDII]

Bleed nipple is possibly too small. The objective of the bench bleeding is to stop air from going back into the outlet as you release the piston as you pump it. If you can fit a plastic tube into the fitting and it seals well you'll be OK but you need to make sure it can't pull air from around the thread.

I used some short brake lines I got from around a master cylinder off a Previa van for bench bleeding the brake master cylinder then pushed some clear tube over the ends and put them into the reservoir like how you've described. As long as air can't get back in between the end of the clear tube submerged in the fluid and the threaded outlet you should be OK. When you go to move the master cylinder from the bench into the car try seal the outlet with your finger or something else to stop fluid leaking and introducing air back into it. It's much easier to do with 2 people if you can.

[mknz]

I did by submerging the end of the master cylinder in a lil pot of brake fluid (you can get a 1L for 15$ so it's cheap enough). It's messier so grab something to catch the drips to save your paint if you do it this way. If you have the piston all the way out, then put on the reservoir cap it'll help the fluid leaking out too. I personally just bled the whole system to the back since it was all old gunk.

[Trotbags]

Thanks for the advice.