What causes brake pads to retract?
Fluid pressure inside the caliper pushes one or more pistons outward to apply the brake. When the brake pedal is released, hydraulic pressure drops and the calipers loosen their grip. When the brakes are released, the piston seals retract the pistons, allowing the rotor runout to kick the pads away from the rotors.
What tool may be needed to retract an electric parking brake caliper?
RETRACTOR Electronic Parking Brake Tool
The RETRACTOR Electronic Parking Brake Tool does exactly what is says, it allows you to retract the brake calipers, replace your pads, contract the calipers back again to full rotor contact, then finally STEP retract the calipers to set the pad to rotor clearance.
What is PAD knock back?
Pad knock-back occurs when pads lose contact with the rotors, and it can be accompanied by excessive caliper piston retraction. When knock-back occurs, the master cylinder has to push the caliper piston out farther than usual, which results not only in a spongy brake pedal but a longer than usual stroke.
What does the mx808 electronic parking brake do?
These use reverse engineering to crack the codes of Volvo, Mercedes, and BMW vehicles. Beyond just being used for the electronic parking brakes, the MX808 can perform a myriad of useful diagnostic functions on your car and is one of the most useful tools you can have at your disposal.
How do you reset the parking brake on a Volvo?
For Volvo drivers, when replacing rear brake pads, there’s an extra step they must go through before the job is complete, and that’s resetting the electronic parking brake using a special tool. This tool is typically referred to as VIDA, but there are ways around using this specific Volvo tool.
Can You retract an electronic parking brake manually?
Buying a dedicated electronic parking brake tool is a small investment that will ensure easy brake jobs for years to come. For the infrequent DIY’er, simply removing the EPB motor and retracting the piston manually is a perfectly viable alternative method.
Is there a way to retract the EPB on a Volvo?
For the infrequent DIY’er, simply removing the EPB motor and retracting the piston manually is a perfectly viable alternative method. If you interested in more Volvo content, whether that is DIYs, builds, or news, visit our Volvo hub at volvo.fcpeuro.com.