brake fluid bleeding problems

[Jules-C]

If you have removed the brake caliper it's quite common to end up with a bubble where the brake pipe comes out the top on the master cylinder and depending on the size of the bubble it can be almost impossible to get rid of by normal bleeding since it keeps returning the this high point in the system.  Sometime slackening the banjo bolt on the top the the master cylinder can let the bubble out but you risk letting more air in. 

If you unbolt the caliper from the bracket and the brake pipe guide from the swinging arm and tie it so brake pipe runs uphill from the master cylinder to the caliper and then bleed it you should get rid of the bubble.