BRAKE SERVICE
This measurement indicates how much friction material remains on a brake pad or shoe.
What is friction-material thickness?
brake pedal that feels unusually soft or spongy may indicate this condition.
What is air in the hydraulic system?
This component pushes the brake shoes outward against the inside of a drum on a typical hydraulic drum brake.
What is the wheel cylinder?
This component clamps the brake pads against the rotor when hydraulic pressure is applied.
What is the caliper?
This system prevents the wheels from locking during hard braking and helps maintain steering control.
What is ABS?
Before performing brake service, the technician should first verify the customer's complaint and perform this.
What is a visual inspection?
vehicle pulls to one side when the brakes are applied. This is one possible cause.
What is a sticking brake caliper/wheel cylinder or uneven brake application?
This component maintains the proper clearance between the brake shoes and the drum as the shoes wear.
What is the adjuster/self-adjuster?
The rotating disc that the brake pads clamp against is called this
What is the brake rotor?
An ABS warning lamp remains illuminated after the vehicle is started. The technician should retrieve this type of information before replacing ABS components.
What are diagnostic trouble codes and related scan-tool data?
A brake rotor that has excessive variation in thickness can contribute to this pulsation felt through the brake pedal.
What is brake pedal pulsation?
A customer reports a vibration through the steering wheel when braking from highway speeds. The technician should inspect these components first.
What are the front brake rotors and related components?
A drum brake shoe has significantly more friction material at one end than the other. The technician should pay attention to this because drum brake shoes can have different designs and positions.
What are primary and secondary shoes?
A brake caliper's slide or guide pins allow the caliper to do this.
what is move so that the pads can apply evenly to both sides of the rotor?
An ABS wheel-speed sensor signal drops out intermittently while the vehicle is moving. The technician should inspect the sensor and this associated component for damage, contamination, or excessive air gap.
What is the tone ring/reluctor/encoder?
When servicing a brake system, brake components should be inspected for contamination from this substance because it can seriously reduce friction.
What is brake fluid?
A vehicle's brake pedal gradually sinks toward the floor while steady pressure is maintained, with no obvious external fluid leak. The technician should suspect this hydraulic problem.
What is an internal master-cylinder bypass?
A technician measures a brake drum and discovers that its inside diameter exceeds the manufacturer's maximum specification. What should be done?
What is replace the drum?
The inner brake pad is worn much more than the outer pad. One possible cause is this.
What is a sticking caliper piston or restricted caliper slide/guide?
The brake pedal feels normal during ordinary braking, but the ABS activates unexpectedly at very low speeds as the vehicle approaches a stop. What should the technician investigate?
What is an inaccurate wheel-speed signal, such as a damaged/contaminated tone ring, wheel-speed sensor problem, excessive sensor air gap, or related wiring issue?
A technician replaces brake pads but does not determine why the original pads wore unevenly. The vehicle returns with the same problem. What important part of the repair process was missed?
What is determining the root cause of the original problem?
A customer complains of a burning smell from one wheel after driving. The technician finds one brake rotor extremely hot compared with the others. What should be investigated?
What is a brake that is not releasing properly, such as a sticking caliper, seized slide, restricted hose, or parking-brake problem?
A rear drum brake assembly has been serviced, but the technician discovers brake fluid inside the drum. What should be suspected, and why is this important?
What is a leaking wheel cylinder, because brake fluid contamination can severely reduce braking performance and contaminate the friction material?
A technician measures rotor thickness at several locations and finds significant differences between measurements. This condition is called this.
What is disc/rotor thickness variation?
A scan tool shows that three wheel-speed sensors agree closely while one sensor suddenly reports a much lower vehicle speed during braking. The technician should not immediately replace the ABS module. What should be checked first?
What is the affected wheel-speed sensor, wiring, connector, sensor mounting/air gap, and tone ring/encoder?