Common questions

How do you release the rear brake caliper pressure?

How do you release the rear brake caliper pressure?

How To Release Brake Caliper Pressure (5 Steps)

  1. Step 1: Lift car and remove wheels.
  2. Step 2: Remove caliper and brake pads.
  3. Step 3: Prepare your tools.
  4. Step 4: Compress the brake caliper piston.
  5. Step 5: Reassemble.

How to retract the rear caliper piston with an integral parking brake?

How to retract the rear caliper piston with an integral parking brake. This style requires you to twist and push the piston in at the same time. They cannot be simply pushed back in. Category Autos & Vehicles Show moreShow less Loading… Advertisement AutoplayWhen autoplay is enabled, a suggested video will automatically play next.

How do brake pads recoil after you let go of the brake?

Then when the brake is released the seal then returns to its normal shape pulling the piston back to its original position. If the pads have worn enough, the seal will actually make contact with the angled edge and stop. The piston will then continue to move, slipping on the seal allowing the piston to adjust for wear.

How is the piston seal on a caliper made?

The caliper piston seal is of a “square cut” design. The outside edge of the groove (the edge of the groove nearest the inner brake pad) is cut at a slight angle. This angle allows the seal to flex slightly on brake application.

What is the hold off valve on a disc brake system?

In a brake system with disc front and drum rear, there is a valve in the system known as a metering valve or hold-off valve. This valve basically allows the rear drums to apply first in the system.

How does line pressure work in a brake system?

The key ingredient to any brake system is line pressure, which is a function of the master cylinder size and how much force is applied to the M/C via brake pedal or lever. It also determines the clamping force of the calipers.

How much psi should I put on my brake system?

M-W Enterprises recommends that at least 1200 psi system line pressure is available under severe braking conditions. And the master cylinder bore size (which determines how much fluid the piston can move) can be determined by using a special Brake System Pressure Calculator on this website.

What happens if you have too much pressure in your brake system?

But this also leads to excessive heat being generated in the brake rotors —which can cause warping and/or cupping, creating a whole different set of problems. What is the proper system fluid volume (a door car with 4-piston calipers on all corners will require more than a dragster with only rear brakes) and how much line pressure should you have?

In a brake system with disc front and drum rear, there is a valve in the system known as a metering valve or hold-off valve. This valve basically allows the rear drums to apply first in the system.

Author Image
Ruth Doyle