Disc brakes
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Transcript of Disc brakes
![Page 1: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/1.jpg)
Automotive Disc Brakes
![Page 2: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/2.jpg)
Disc Brakes
Disc brakes are fairly simple to work with, once you know the parts and their functions. Typically, there are 4 main parts of a system:Mounting BracketRotorCaliperPads
![Page 3: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/3.jpg)
Mounting Brackets
Mounting Brackets are used to hold the Caliper in place.
Other than keeping the surface clean and free of rust and road grime, there is very little to be done with this part
![Page 4: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/4.jpg)
Rotors
Rotors are metal discs supported by the suspension. The Calipers clamp on to them to slow their rotation, and then slow or stop the car
![Page 5: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/5.jpg)
Vented Rotor
These are the VENTS
![Page 6: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/6.jpg)
Vented Rotors
Vented Rotors have Fins in the spaces between their machined surfaces. These spaces allow air to pass through, which helps carry heat away.
![Page 7: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/7.jpg)
Nonvented Rotor
Non Vented Rotors are used on smaller vehicles, and have no cooling fins
![Page 8: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/8.jpg)
Non Vented Rotor
![Page 9: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/9.jpg)
Rotor Repair
We will get back to these Rotors later concerning what you can do as a repair on them.
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Calipers
Calipers are the housings that contain the Pistons and the Brake Pads. The Calipers are connected to the Hydraulic System, and hold the brake pads to the Rotor
![Page 11: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/11.jpg)
Caliper Types
There are 2 types of Calipers
Fixed
Floating
![Page 12: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/12.jpg)
Fixed Caliper
Fixed Calipers are disc brakes that use a caliper that is FIXED in position and does not slide. They have pistons on both sides of the disc. There may be 2 or 4 pistons per caliper
![Page 13: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/13.jpg)
Fixed Caliper
Motorcycles and some import trucks and cars use this type
![Page 14: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/14.jpg)
Sliding Caliper
Much more commonSingle PistonEasier to work withOn “inboard” side of caliper
![Page 15: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/15.jpg)
Clean, Floating Caliper
![Page 16: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/16.jpg)
Floating Calipers
![Page 17: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/17.jpg)
Operation
Piston applies pressure to Inboard pad. As the pad contacts the rotor, the caliper slides along the pins, pulling the outboard pad into contact.
Caliper
Rotor
Piston
Brake Pads
Brake Line
![Page 18: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/18.jpg)
Sliding caliper in operation
![Page 19: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/19.jpg)
Parts of a Caliper
![Page 20: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/20.jpg)
Seal
The rebuild kit will have a new O ring, and a Dust Seal
![Page 21: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/21.jpg)
Piston
The Piston surface should be smooth and clean. This one is pitted, and needs replaced.
![Page 22: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/22.jpg)
Adjustments?
•Disc Brakes will automatically self-adjust.
•As the Pads wear, the caliper piston will not retract as far
•This leaves a larger amount of brake fluid in the caliper, causing the master cylinder level to lower
![Page 23: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/23.jpg)
Caliper Slides
Notice where the brake pads and calipers slide on the pin and the mount
![Page 24: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/24.jpg)
Caliper slides
Since parts need to slide, these areas should be clean of dirt and rust,
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Cleaning Caliper
With the caliper off, I would use a wire brush to clean the rust off, then use a brake cleaning solvent to wash the sliding area.
![Page 26: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/26.jpg)
Wear Indicators
Brake pads wear, and most people never check them. So, something was put on the pads to make a noise, since most people will have a noise checked out.
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Diagnosis
Several different types of Complaints
Noise
Pulsation
Pedal travel
More later…
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Brake Noise
Wear Indicator
![Page 29: Disc brakes](https://reader031.fdocuments.in/reader031/viewer/2022022203/587120441a28abe4448b4de9/html5/thumbnails/29.jpg)
Brake Pulsation
Usually a warped Rotor
Rotor needs trued on a brake lathe