bleeding single piston MC

I had to unscrew my brake light switch to put in a new one. It was frozen so I had to remove the "bolt" that it was screwed into( the one that goes through the housing for the brake line fitting). I put it all back together and the new switch works fine. However, I am certain there is now air trapped in there as my pedal feels spongy. What is the best way to get the air out. Should I make sure everything is tight, put pressure on the pedal and loosen the light switch or loosen the line fitting (on bottom)? Maybe loosen the fitting where it goes into the MC? Anyone done this?


Josh

 

Sure, done this more times than I'd like, LOL!
Anytime there's air in the system, you have to bleed the brakes in a certain manner: starting with the furthest wheel which is the right rear wheel, then left rear wheel, then front right wheel, and finally the front left wheel. That way you're SURE all air is out of the system.

It can be done with one person (which is all I've ever known, lol), but better to have a helper there to spot bubbles in the brake fluid. HTH !

 

NAPA sells a "one way bleeder screw" -- that is my term, not theirs.

Install the bleeder screw in place of the normal bleeder valve screw in each wheel cylinder.

When you loosen the bleeder valve and step on the brakes you will expel air, but it won't suck air back into the system when you release the brake pedal.

Works well! However, you will expel more brake fluid than you might think, so be sure to check the fluid level in the M/C each time you pump the brakes.

This one is truly a one man setup and works easy.

 

Just replaced my MC, and moved the brake light switch from the old to new as well.

Bought some speed bleeders for $28 (expensive), and bleed some brakes for the first time in my life. My brother was helping me. I don't know how in the world I would have ever got it done without the speed bleeders, or this forum.

If only there were an early CJ5 magazine that I can take on the road with me,,,that would be sweet!

 

I bled the brakes by having wifey push the pedal while I cracked the line fitting -some air came out. The pedal still felt strange so I did each wheel. I took it for a test drive and it was pulling to the right a little, but I drove a little more and it went away. I think it is OK now, the switch works much better too.

Josh