Rear Brake Binding

[Kevin M Pulham]

One rear brake binding when spun on french built 03 Yaris. I have removed the drum, inspected the shoes and drum, checked the hand brake adjustment. The drum slides on and off easily. It only binds when the wheel nuts are tightened.

[Madasafish]

Sounds like a distorting drum. Check the mating faces are clean and free of dirt. or rust. and that the bolt threads for the wheel nuts are clean and free of dirt. If there is dirt on the mating surfaces , the drum will warp on tightening..Also check you tighten each nut to the same torque - uneven tightening can warp the drum as well..

Check the brake shoes move cleanly on the various mating surfaces and there is a trace of copper grease on those surfaces to prevent binding..(no grease on shoe surfaces or drum surface of course). If one shoe is sticking, then the brakes may bind..

[Kevin M Pulham]

All mating surfaces have been cleaned, shoes removed, brake back plate cleaned, all wheel stud threads cleaned, tightened opposite corners equally smear of copper grease on points where shoes slide. I took the brake drum off the good side and fitted it still had the same problem. Fitted the suspect the suspected faulty brake drum to the good side with no problem.

I found almost exactly the same problem at this site below

http://www.mkivsupra.net/vbb/showthread.php?301942-Toyota-Yaris-rear-brakes

Found the trailing brake shoe slave piston was seized once the brake pedal was pressed the piston applied the brake but did not retract. Checked the other side carefully and found one piston completely seized. Fitted new slave cylinders now working perfectly.

[paris5049]

had same problem,changed brake master cylinder