To tell you the truth, Volvo rear disc brakes don't operate that much differently than the front wheel disc brakes. They are pretty much the same. We can, however, talk about disc brakes themselves, and then discuss whatever differences there might be.
A Look at Your Volvo Disc Brakes
What stops your vehicle? Answer: your disc brakes There are several basic parts (or components) involved in disc brakes. The main features are a rotor, a caliper, and brake pads. Let's take a closer look at each one of these.
Your Brake Rotors
Connected by ribs, this feature of the braking system consists of two iron discs. As you apply your brakes, both iron discs are pressed upon by your brake pads. And even though they all perform the same function, for different rotors, there are various ribbon designs. There is a lot of friction between the brake pads and the rotor. These ribs help to dissipate a lot of that heat. They direct cool air to the rotor and allow the hot air to vent from it as well. For rotors to work properly, it is essential that they be able to do their job – dissipate plenty of heat.
The Brake Caliper
The second feature we will talk about on your Volvo disc brakes is the caliper. It contains both brake pads and is found over the top of the rotor. When it comes to calipers, there are two kinds:
- Fixed calipers – These calipers don't move. Located on either side of the rotor, you will find two pistons. Brake fluid is put to use when you apply your brakes. Braking pushes a pair of pistons into your brake pads. Brake pads push on the rotor’s sides. This stops the wheel and halts the car. What is a rotor? Connected to the tires hub you will find an iron disc. This is the rotor. With the brake pads, it works hand-in-hand to stop your vehicle. Fiction is created by the rotor and brake pads pressing against each other when you step on your brake pedal. A tremendous amount of heat is generated when you stop your vehicle because of this friction.
- Floating calipers – These contain only one piston and can compress themselves. As you apply your brakes, the piston is forced into the brake pad using brake fluid. The pad then pushes against the rotor. As a result, the calipers other side presses against the rotor with the other brake pad. All of this serves to stop the wheel and halt the vehicle.
What Are Brake Pads?
Located on each side of the rotor you will find brake pads. Their job is to press against the rotor. This stops the wheel and then the vehicle. You would not be able to stop your vehicle without the necessary friction created by your brake pads.
What's The Difference between Front and Rear?
The difference between Volvo disc brakes, front and rear, is that an emergency/parking brake is included in the rear disc brakes. On the outside chance that your brakes fail completely, parking brakes must be totally independent of the regular hydraulic brakes on your vehicle. Parking brakes can be connected in a couple of different ways, but that is for another day.