I finally got to the cause of my seized brake drum. After replacing the shoes, wheel cylinder and drum, it turned out to be the short flexi that joins up the break pipe at the rear of the bus. The issue was that the wheel cylinder was not retracting after I took my foot off the brake pedal. This caused the shoes to stick on and heat up the drum! Below is a picture of the result!
One wheel that got very very hot!
Brake shoes without any material on them! and a damaged wheel cylinder.
Above is a pic of the new flexi in place. The old pipe did not look damaged at all but it must of collapsed in side. After replacing it the wheel cylinder function properly and brakes are now working again!
Thank you so much for those information. I once went to the center for Brake Pads to repair my car and also to replace the brake pads since they were worn out. I really loved their service.
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