Front calipers are mounted on _______________ _______________ or adapters that may be an inte- gral part of the steering knuckles.
Caliper Supports
When any brake installation reaches its limit of heat dissipation, _______________ _______________ sets in.
Brake Fade
- _______________ rotors are made of different materials, usually cast iron and steel, to reduce weight.
Composite
. _______________ linings usually wear faster than do semi-metallic linings, but they have the benefit of breaking in faster.
Organic
With disc brakes most of the _______________ area is cooling while only a small area
directly contacts the friction materials at any given time.
Swept Area
Disc brakes do not suffer from _______________ fade because the rotor does not expand away from the pads.
Mechanical
Low-drag calipers require a quick take-up _______________ cylinder.
Master
The _______________ _______________ _______________ converts hydraulic
pressure from the master cylinder to mechanical force.
Disk Brake Caliper
Many rear disc brakes have a small brake drum built into the center of the _______________.
Rotor
Sliding or floating calipers have a piston only on the_______________ side.
Inboard
The advantages and disadvantages of disc brake systems are being discussed. Technician A says that disc brakes are more likely to develop brake fade and water fade. Technician B says that reduc- tion of mechanical fade and gas fade is an advan- tage of disc brakes. Who is correct?
Both A and B
The operation of disc brake systems is being dis- cussed. Technician A says that composite rotors were developed to save weight. Technician B says that a fixed rotor assembly is part of the hub. Who is correct?
Both
Disc brake calipers are being discussed. Technician A says that a single caliper may have one, two, or more pistons. Technician B says that the piston seal is known as a square-cut seal. Who is correct?
Both
Technician A says that solid rotors can usually be machined several times before their minimum thickness limits are reached. Technician B says that composite rotors have cast-iron hubs with steel friction surfaces. Who is correct?
Neither
When discussing disc brake work, Technician A says that organic linings are a composite material made from bonding nonmetallic fibers. Technician B says that semi-metallic linings require higher brake pedal effort but are more fade resistant compared to organic linings. Who is correct?
Both
Two technicians are discussing a disc brake caliper: Technician A says that calipers use springs to retract the seals after a brake application. Technician B says that sliding calipers typically use one piston on each side of the rotor. Who is correct?
Both
Technician A says that a return spring is used to retract a caliper piston. Technician B says that the piston seal retracts the caliper piston when hydraulic pressure is released. Who is correct?
A Only
Technician A says that inner and outer pad fric- tion materials may have different coefficients of friction. Technician B says to follow the manufac- turer’s recommendation for inboard and outboard pad linings when replacing brake pads. Who is correct?
Both
Technician A says that when the driver hears the audible brake pad wear indicator, he or she should immediately park the car and not use it until the brakes are replaced. Technician B says that the wear pad indicators alert the driver to worn pads that should be replaced soon. Who is correct?
B only
Technician A says that synthetic brake linings are nonorganic, nonmetallic, and non-asbestos mate- rials. Technician B says that synthetic brake lin- ings are made of aramid or fiberglass. Who is correct?
Both
- List the basic parts of a disc brake.
Rotor (hub and breaking surface) brake pads, Calipers
- Explain the advantages and disadvantages of an aluminum caliper.
Lightwaight for high performance, but very poor thermal insulator and increases the danger of boiling the brake fluid
- Why do manufacturers use two-piece rotors on some vehicles?
Reduces weight using different materialys, usually cast iron and steel. Friction surfaces are cast iron but supporting parts are steel to reduce weight
- In addition to keeping road splash off the brake assembly, why are splash shields used on disc
brakes?
Important for directing air over the rotor to aid in cooling
