Rear brake bleed

I replaced my banjo bolt but now I can't get a firm feeling on my brake pedal. I know air is causing the issue but not sure if I am bleeding correctly. Another ???, there is a rubber seal inside the brake fluid reservoir and I am not sure what I am supposed to do with it.

Anyone has deal with this situation before?

Thanks

The rubber seal under the cap, just pick it out. Its there to take up the fluid level when it moves to the caliper and back again. Don't over fill , fill to half full and before putting the seal back wash in soapy water , dry thoughly , this will ensure a good seal against weepage.
Google how to bleed rear brakes explained better than I can .

Read the manual on how to bleed or guide by anti hero

1299rookie said:

I replaced my banjo bolt but now I can't get a firm feeling on my brake pedal. I know air is causing the issue but not sure if I am bleeding correctly. Another ???, there is a rubber seal inside the brake fluid reservoir and I am not sure what I am supposed to do with it.

Anyone has deal with this situation before?

Thanks

Click to expand...

There is a good thread on here somewhere but you have to remove the caliper and turn it upside down. Use a clear tube so you can see bubbles. Do it the old fashioned way. I could never get those vac systems to work.

Sometimes better with two people. One to push the lever or pedal and one to say squeeze and release as they undo and do up the bleed nipple.

Those suction bleeders.....there is a trick, you need to use some thread tape around the thread on the bleed nipple , it stops air sucking past and pulls the fluid down real quick.

brake caliper bleeding

It can be an absolute sod sometimes as a trapped bubble may not move despite all the advice.
But take your time.
Remove the rear caliper being careful not to operate the lever until a distance piece (anything the same thickness of the brake disc) is inserted between the pads.
Raise the caliper (tie it to a piece of string and hang it up until it is higher than any other part of the system). Some say mount it on the top edge of the disc but it didn't work for me.
You now have two hand free to slacken the bleed nipple and pump the lever until all signs of air have stopped passing through.
On the last push of the lever hold it down and tighten the nipple.
Better still, before you start buy a replacement "speed bleed" nipple that has a one way valve and do the job easier with one hand and just tighten up whenever you like, they're magic, no bottles or bags just a tube to collect the unwanted flushing fluid. On the front always bleed the l/h caliper first and remember to bleed from the lever end nipple also as air gets trapped there too, as this is the highest point and a little air can remain trapped there.
I fitted a thumb rear brake retaining the foot lever as well and its a bugger to bleed but great when the jobs done well worth the work and effort, good luck

I had similar issues with my old Tuono

I hung mine up like this, strapped down the brake lever overnight, similar to putting a zip tie on the front brake lever.

It got better, but what really cleared the air was to slightly crack the bleed nipple and then pump the brake lever very rapidly keeping the reservoir fill. The fast flow of fluid, due to the pumping, must have dislodged the bubble.