Exam 51: Drum Brakes

On most cars, the push nuts that hold the drum onto the studs of a floating drum do not need to be reinstalled after service.

On most vehicles, the automatic adjuster system ______.

The brake's ____________________ pin acts as a brake shoe stop and prohibits the brake shoe from its tendency to follow the movement of the rotating drum.

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 an out-of-round drum can cause a pulsating brake pedal. Technician B says an out-of-round drum can cause the brakes to grab. 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 replaces self-adjusters with worn teeth. Technician B swaps the left and right side star wheel adjuster positions. This way the adjuster pawl gets an unworn surface to ratchet against. Who is correct?

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?

A buildup of brake dust and dirt between the lining and the drum is the most common cause of a ______.

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

Some anchor pins are adjustable.

A brake inspection reveals a leaking wheel cylinder that has soaked the brake shoes with brake fluid. The shoes are virtually new, and the drums are in excellent condition. Technician A says to clean the brake assembly with an aqueous brake cleaner, then thoroughly clean the shoes with a brake cleaning solvent. Technician B says thoroughly clean the brake assembly, then install new brake shoes. Who is correct?

Wheel cylinders should be rebuilt or replaced if _____.

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 lever that moves the star wheel on the self-adjuster is often called a(n) ____________________.

In the unapplied position, drum brake shoes are held against the anchor pin by the ______.

Drum brakes are still used on the front wheels of many late model cars and light trucks.

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

A clicking noise heard when the brakes are applied could be caused by ______.

What three checks should be made before conducting a road test for a brake problem?