Drum Brakes

Two technicians are discussing drum brake shoes. Technician A says the forward and rearward facing shoes are the same and can be installed in either position on any drum brake system. Technician B says the darker color lining should always be placed toward the front of the vehicle. Which tech is correct?

Neither

Two technicians are discussing brake lining edge codes. Technician A says that the code can be identify the manufacture. Technician B says all friction material from the same manufacture will have the same edge codes. Which tech is correct?

Tech A

Technician A says that starwheel adjusters use different threads (left and right handed) for the left and right sides of the vehicle. Technician B says that a pawl controls the teeth of the star wheel adjuster. Which tech is correct?

Both

Technician A says drum brakes can fail to slow the vehicle if driven through deep water. Technician B says when drum brakes get hot, the brake pedal will drop because the drum expands away from the shoes. Which tech is correct?

Both

Technician A says self-adjusters used on most drum brake work when the brakes are applied, then release while traveling in reverse. Technician B says some adjusters can over adjust if the brake drums are hot. Which tech is correct?

Both

Drum brake shoes ________ .

All of the above (Can have riveted linings, can have bonded linings, can have one shoe that is longer than the other on the same wheel brake.)

Which lining does most of the brake on a dual-servo brake?

Rear (rearward facing)

Which lining does most of the braking on a leading-trailing brake?

Leading (forward facing)

Two technicians are discussing drum brake self adjusters. Technician A says that a frozen star wheel adjuster can cause the brakes to lock up due to the adjusting lever being unable to move the adjuster causing the linkage to bind. Technician B says some brakes self-adjust when the brakes are applied rather than when released. Which tech is correct?

Tech B

A typical drum backing plate has how many shoe support pads (also called ledges).

6