Hard spots on a brake drum can be caused by uneven heating during braking, often due to excessive brake use or a malfunctioning braking system. This can lead to localized hardening of the drum material, resulting in inconsistent surface texture. Additionally, contamination from oil or grease can contribute to hard spots, as can manufacturing defects or wear over time. Regular inspections and maintenance can help prevent these issues.
brake caliber
There could be several reasons such as, you forgot to release the e-brake and drove the vehicle with the e-brake on, or a grease seal went bad and grease is getting onto the hot brake drum or brake rotor, or brake fluid from a leaky wheel cylinder or caliper is getting onto the hot brake drum or brake rotor.
un equal adjustment of brakes will cause one brake to apply earlier and harder than other brake
Depends on the vehicle; could be drum/shoe arrangement with cable actuation; could be rear disc brake pads with cable or could be rear disc brake with inner shoe and drum inside the rotor.
Yes, it's very dangerous. The brake drum is made from cast iron which is very brittle. If that crack opens up and spreads, it could cause the brake shoe to bind and put your car into a skid. Rick http://free-auto-repair-advice.blogspot.com/
Brake drums can be resurfaced by turning the brake drum in a brake drum lathe. When the brake drum has deep grooves in it, it cannot be repaired.
Worn brake drum pads and possibly your wheel bearing.
A drum brake is a brake that uses friction caused by a set of shoes or pads that press against a rotating drum-shaped part called a brake drum. The term drum brake usually means a brake in which shoes press on the inner surface of the drum.
Check if the emergency brake cable isn't slightly on. This could could prevent the brake linings from clearing the lip on the outside edge of the brake drum. This is a common problem.
most likely if you have drum brakes. the shoe has came off the metal mount, and lodged itself in the drum. get new brake shoes. but have fun getting the drum off!!!!!!
A blown out rear axle seal will cause grease to leak out into the brake drums
The drum and the brake shoes.