Rear brake heats up and lock up

[4strokebully]

Wat up guys I recently got my rear master and caliper chrome and rebuilt both of them after chroming and it happened to me twice that my rear caliper heated up and locked up once I take the brake line off it unlocks need help please!!! Cleaned fluid and took both apart twice

 

 

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[imbill]

The rubber brake line may be bad  lettin the fluid go to the caliper but not return   !!!!!!

[Tedder]

Yup, I think imbill nailed it. 

Not real common but I've seen high pressure hoses cause that exact problem in the automotive field.

[wfobasheeboy]

Also check Pedal Adjustment. If there no free play it will do the same thing. I have that happen before. just my .02.

[4strokebully]

Thanks guys it's a brand new steel braided line but I'm a check adjustment since I did take it apart

 

 

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[Piediddy]

Check the 2 axle nuts and make sure they tight. Mine was locking up and would do the same thing. I rebuilt the caliper and rode again till it locked up and bent the brake disc. Then I realized the nuts were loose.

[Starwriter]

As mentioned, check the adjustment. If the brake lever is hitting the clutch cover and not allowing the master cylinder to completely release, the brake will lock up as the brake fluid heats up and expands. It's also possible that there's chrome in the bore of the master, preventing the piston from completely releasing.