Drum Brakes 2

Technician A says the tinnerman nuts are used to hold the brake drum on and should be reinstalled when the drum is replaced. Technician B says a drum should be removed inside a sealed vacuum enclosure or washed with water or solvent to prevent possible asbestos dust from being released into the air. Which tech is correct?

Tech B

The back plate should be replaced if the shoe contact area (pads or ledges) are worn more than _______.

1/16” (1.5mm)

Technician A says silicone brake grease can be used to lubricate the shoe contact ledges. Technician B says synthetic brake grease, lithium brake grease, or anti-seize compound can be used as a brake lubricant. Which tech is correct?

Both

Most brake experts and vehicles manufactures recommend replacing brake lining when the lining thickness is ___________ .

0.060” (1.5mm)

Technician A says the star wheel adjusters use different threads (left and right-handed) for the left and right sides of the vehicle. Technician B says the threads and end caps of the adjusters should be lubricated with brake grease before being installed. Which tech is correct?

Both

Technician A says many vehicle manufactures recommend wheel cylinders not be honed because of the special surface finish inside the bore. Technician B says some experts recommend the wheel cylinders be replaced every time the brake linings are replaced. Which tech is correct?

Both

Most manufactures recommend that brake parts should be cleaned with ________.

Denatured alcohol

Old brake shoes are often returned to the manufacture when new friction material is installed. These old shoes are usually called the _______ .

Core

After assembling a drum brake it is discovered that the brake drum will not fit over the new brake shoes. Technician A says the parking brake cable may not have been fully released. Technician B says to check to see if both shoes are contacting the anchor pin. Which tech is correct?

Both

Technician A says to use masking tape to temporarily over lining material to help prevent getting grease on the lining. Technician B says grease on the brake lining can cause the brakes to grab. Which tech is correct?

Both