Fluid pumping out master cylinder

I've only bled brakes a few times in my life.  In the past I have left the cap off the MC for re-filling as I go along.  This time, as I push the brake, the fluid comes out the top and spills over the side.  This shouldn't happen, should it?

I kneel beside the jeep and push with my hand.

Shouldn't that be the one most far away ?

When you push down on the brake pedal it had better squirt brake fluid up. If it don't then the pressure will build up in the brake system and lock the brakes up.

Edited by Carlsjeep - 18 Aug. 2011 at 1:17am

grease on bleeder screw? dont sound like a good idea to me.

Is the MC new? Is it a single reservoir or dual? Did you bench-bleed it? After filling, replace and snug cap. Have a brake person depress pedal for you. Start at point furthest from MC. Usually right-rear. Pump pedal 3-5 strokes until firm then hold. Open bleeder and look for clear, bubble-less fluid. Close bleeder when pedal on floor. Do not allow pedal to rise before closing valve. Repeat at that location as necessary. Only then do you move to the next closest. Usually left rear. Refill MC as required. Then right front followed by left. This process has worked for me for decades.

If you don't pump the pressure up with multiple pushes you may not have enough pressure to expel aerated fluid as quickly as you want to. You can always refill the MC. By the way, I use a clear hose attached to the bleed valve and feeding into a closed mason jar (Bubba would approve). No mess.

Yes, you have to pump the brakes up to get pressure in the lines before you bleed them. If you don't it will take much longer to get them bled. 

Edited by Carlsjeep - 24 Aug. 2011 at 4:46am

there are three basic ways to bleed brakes 1. the way scoutpilot discribed with two people- pump pedal- hold pedal- relase fluid- pedal to floor-tighten bleeder - repaet as necessary .2. Use a vacum pump designed for bleeding brakes and suck all the air out 3. Use a pressure bleeder designed for bleeding brakes. Scoutpilots method requires a partner and is probably the easiest for the home mechanic types some of the variations ie. a bottle with a hose submerged in brake fluid bleeders with oneway checkvales work but are either messy or a real PIA to set up.The vacum pump is messy and time consuming and requires a 35.00 vacum pump with a brake bleeding adapter. The regular brake  pressure bleeder works great but I bought mine 20 years ago and I think back then it was 100.00

I'v always used the mason jar and hose,sometimes I'v had to do it alone and it still worked.Normally I use twice as much fluid in the end though(after rebuilding the whole brake system I figure a good flushing cant hurt anyway ). The good thing with these jeeps is they are almost self bleeding,I'v found as long as you get most of the air out and you have the lines bent much like the oem ones,often the air will work its self out.