When oil boils, what is found inside those bubbles?
when the weather got really hot... the bagger would ... hang up or drag.
How high did you fill the fluid? Any kind of casting line inside the rez saying level stops here?
I noticed the rear brake pedel would be harder to push.
So on an overfill, heat expands, the diaphragm was wrinkled on the cap pressing down, the air gap between the top of the cap, the bladder of air is like nil, all crushed and the air out of the cap went on and screwed down. Then comes the heat, the bladder sort of expands, pushed the oil without the lever. But being, cool inside is 14.7 no pressure build due to thermodynamic changes.
I did rebuild the rear calipar.
So we are talking an every 2 year fluid dump after how many times vs. year of the bike? I'll get back to that.
... the front brake would hang up. After the bike sits in the shade and cools down there normal again.
So are we saying overfilled? Why the rebuild? Has the front been changed at the same time?
Say the level is correct. Say there is so much expansion of the rubber? The groove contamination is another? I'm done with the diaphragm variable. This is more generic is this one type ring. It's called a Quad-Ring. So imagine a plain old oring, but this one has 4 sides. Cut the ring and you can see the square. Cut an oring and you see the circle. In the caliper, they cut a groove in the caliper and place the q-ring in that groove. The quad just ever so sticks out, and the piston slides into the caliper, sealing around the piston.
Oil is heavier than water, so the condensation in the oil is going to drop down to the lowest point, and that is right under the groove where the quad sits. Years gone by, that crystallizing builds, lifts the quad out of the groove, tightens the piston and locks it. So memory means, the quad in a static condition. In other words, the static is ( l l ) the quad is straight up and down. When you hit the brakes, the quad moves ( // ) forward and the oil pushes the piston towards the pad and onto the disc. The brakes are released, the ( l l ) quad returns to memory, pulls the piston back with it = No drag.
When you cleaned the caliper, are we talking removing material like a machined tolerance between piston and bore hole? Or did you drop the sandpaper, wire wheel, and just used a paper towel and removed the crystal out of the groove, and bore? And I mean all of it with a dentist pick kind of teeth cleaning like. Only a shot of brake spray, let it dry and the sun's ray's shows where you missed.
M/C wise, you'd break the banjo bolt at the caliper; who spun, or who is still locked? See where it frees up at the banjo, it's not the caliper but the master on freewheel?
