Disc Brake Diag

A vehicle is in for a brake inspection and the red brake warning light is ON. Which of the following actions should the technician NOT take?

• Inspect the system for leaks

• Test drive the vehicle    

• Check brake pedal height

• Check the parking brake

Uneven disc brake pad wear is being discussed. Technician A says the caliper piston may be stuck. Technician B says the caliper may be stuck on the slides and unable to “float.” Which technician is correct?

• Tech A

• Tech B

• Both Tech A and Tech B

• Neither Tech A nor Tech B

What should be done after installing new disc brake pads?

• Pump the brake pedal several times

• Test drive the vehicle

• Replace the rotors

• Rotate the piston back into the caliper

Technician A says that a steel piston should be cleaned with sandpaper to remove rust. Technician B says that the brake assembly fluid or clean brake fluid should be used to lubricate the caliper pistons before installing in the caliper. Which technician is correct?

• Tech A

• Tech B

• Both Tech A and Tech B

• neither Tech A nor Tech B

Technician A says that a lack of lubrication on the back of the disc brake pads can cause brake noise. Technician B says that pads that are not correctly crimped to the caliper housing can cause brake noise. Which technician is correct?

• Tech A

• Tech B

• Both Tech A and Tech B

• Neither Tech A nor Tech B

A typical disc brake caliper overhaul (OH) kit usually includes what parts?

• Square-cut O-ring seal and dust boot

• Replacement caliper piston and dust boot

• Disc brake pad clips, dust boot, and caliper piston assembly

• Dust boot, return spring, and caliper seal

Which is NOT a recommended type of grease to use on brake parts?

• Anti-seize compound

• Silicone grease

• Silicone grease

• Wheel bearing (chassis) grease

After a disc brake pad replacement, the brake pedal went to the floor the first time the brake pedal was depressed. The most likely cause was ________.

• normal operation

• air in the lines

• improper disc brake pad installation

• lack of proper lubrication of the caliper slides

What is not included with a loaded caliper?

• A new piston (if needed)

• New brake hardware

• New pads

• A replacement rotor

Technician A says that disc brake pads should be replaced when worn to within 1/16 inch of the pad rivets. Technician B says the pads should be removed and inspected whenever there is a brake performance complaint. Which technician is correct?

• Tech A

• Tech B

• Both Tech A and Tech B

• Neither Tech A nor Tech B