1. Step 1: Jack Up the Car, Support on Axle Stands and Remove the Wheel.
2. Step 2: Remove the Caliper.
3. Step 3: Pump Out the Piston Using Brake Pressure.
4. Step 4: Remove the Old Seals and Clean Up the Caliper.
5. Step 5: Fit the New Piston & Seals.
6. Step 6: Replace Any Extra Parts, Refit the Caliper & Bleed the Brakes.

How do you remove caliper pistons?

Place the rubber tipped blow gun in the main hole where the brake line attaches. Hold the air gun firmly in place to provide a tight seal. Slowly apply pressure; the piston should slide out under the air pressure. If the piston still will not budge, apply heat to the caliper half until it starts to move.

How do you test brake caliper pistons?

Start by safely supporting the vehicle on jack stands and attempting to turn the wheel/tire assembly by hand. If the wheel is hard to turn, you may have a caliper that’s sticking and pushing the pads against the rotor. You can also check the caliper piston by trying to push it back into its bore.

What causes caliper piston to retract?

Square cut seals around the caliper pistons deform when the pistons move, so when pressure is released the seals want to return back to their original shape. This helps retract the pistons slightly,allowing the pads to kick back away from the rotors.

What is the piston on a brake caliper?

What are Caliper Pistons? Brake calipers are an essential component of your overall brake system, and the piston is the key component of the brake caliper. Pistons are responsible for forcing the brake pads to make contact with the brake rotor to bring your vehicle to a stop.

How do you remove a brake pad from a caliper?

Outside brake pad removal. Compress the caliper piston using a C-clamp. A small piece of wood or the old brake pad can be used to apply even pressure to the caliper piston. This will allow the caliper with new brake pads to easily be installed onto the rotor. Figure 6. Compressing caliper piston. Install new brake pads into the brake caliper.

How do you replace the brake pads on a ram 2500HD?

Use the C-clamp to compress caliper piston (Ram 2500HD shown for reference). With the caliper free, the brake pads can be replaced. The inner brake pad simply pops into the caliper piston via a spring clip, and can be easily removed by pulling it away from the piston. The outside pad is held in place with clips that slide over the caliper body.

How do you remove a rear brake drum from a car?

Remove the drum. There is a small hole in the backing plate that allows for adjustment of brakes via a star wheel. Using a screwdriver or brake adjusting tool, spin the star wheel enough to loosen tension of the brake shoes on the drum and remove the drum.