Hang on a sec.
Geysers are normal.
Especially from the rear system,which is usually the frontmost reservoir,closest to the rad.. And it may not have anything to do with air. The rears are drums. Which have huge return springs on the shoes. When you push down on the pedal, you push fluid out to the rear. And when you lift, the fluid is returned by those springs. If you pump too fast,not all the fluid has time to return. If the rear shoe adjustment is loose, it can take many pumps before the shoes finally hit the drums. Then the pedal gets hard. So then you lift off the pedal, and all that fluid is returned rather violently by the return springs, and you get the huge hit-the-hood geyser. That would be a normal consequence of a loose rear shoe adjustment. To prevent this I always crank the rear adjusters until the shoes are jammed up pretty hard; then I slack them off about 3 tool strokes or maybe 10 clicks,just until the drums can be turned with some difficulty. After the system is bled, I redo the rear adjustment. If you crank the adjusters hard and leave them there, it may be difficult to bleed the fronts.
>Yes the geyser may indicate air, but then the pedal will never get hard.
>Once everything is adjusted right and bled, then the geyser thing will be minimized to just a roiling of the fluid.
>Bleeding the master using your fingertips as one-way valves is the fastest way to get the job done. I do it on the bench, with the M/C in a vise. I don't want brake fluid clean up under a customers hood.
>There should never be brakefluid on top of the lid seal,often called a diaphragm. If there is, then it is perforated somewhere. If you are not careful, or if the reservoir is too full or if the reservoir is severely angled n the fore and aft direction, then it is possible to have the fluid forced over the edge during the diaphragm install.Then when you secure the lid,the bailing wire will put the clamp on and the fluid will be weeping for a while. But it should eventually stop. You must make it stop, cuz if fluid is escaping, it probably means air is going in. And air contains moisture. And moisture is the one thing that kills a brake system. So it has to be eliminated.
