Exam 51: Drum Brakes

After resurfacing a brake drum, Technician A cleans it using hot soapy water and a lint-free cloth until it is thoroughly dry. Technician B cleans the drum using a lint-free cloth dipped in a special brake cleaning solution. Who is correct

What is lining heat fade?

What tool is used to adjust the brake shoes before the drum is installed?

Technician A says on a duo-servo brake the front shoe is called the primary shoe and the rear is the secondary shoe. Technician B says on a non-servo brake, the front shoe is called the leading shoe and the rear is the trailing shoe.

The effort of the parking brake pedal assembly or handgrip is multiplied and passed onto the rear cables by the ____________________ lever.

The brake shoe lining provides ____________________ against the drum to stop the car.

Duo-servo drum brakes are also known as __________.

Technician A says the anchor pin acts as a brake shoe stop. Technician B says the return springs on a duo-servo brake are hooked over the anchor pin. Who is correct?

Stepping on the brake pedal while a brake drum is off can cause the pistons in the wheel cylinder to overextend or pop apart.

The parking brake cables should be adjusted before performing regular wheel brake service.

Identify the two drum brake system designs.

Technician A says the leading shoe in a non-servo brake does most of the work when the brakes are applied while in reverse. Technician B says the trailing shoe does most of the work when the brake are applied while moving forward. Who is correct?

Technician A says brake linings are riveted to the brake shoes. Technician B says brake linings are bonded to the brake shoes. Who is correct?

Technician A says the discard dimension of a brake drum is the drum's allowable machining dimension. Technician B says a drum may be machined and used if within 10 percent of the discard dimension. Who is correct?

The inability of drums to dissipate as much heat as disc brakes is one of the main reasons discs have replaced drums at the front of all late model cars and light trucks

Identify six common brake problems.

What does the term duo-servo mean?

On a duo-servo brake, the primary shoe is connected to the secondary shoe by the ____________________.

What is the difference between return springs and holddown springs?

Brake linings should be replaced when linings are ______.