Introduzione
Replacing the pads is one of the simplest ways to keep your front brakes working effectively.
Learn how here. Please keep in mind that brake fluid is corrosive to paint so try to keep it from getting on your car's paint. Be sure to rinse it off if any does land on your paint.
When replacing your rear pads, be sure to check your rotors for excess wear. If necessary, have the rotor re-surface or replace the rotor along with the pads.
Cosa ti serve
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The pad removal process in this guide is performed with the caliper off of the vehicle. The installation process is documented with it on the vehicle. Both procedures can be done with the caliper on the vehicle. The calipers were off of this car for cleaning, since the soft rubber hoses were being replaced too.
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You'll need to remove your wheels to perform this work.
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Start by removing the cotters from the pins that hold the pad retaining springs in place. Not all calipers will use cotters in the pins; some may use compression fit pins. See the front brake pad replacement guide to see how these are removed.
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Now that the pads are removed you will need to move the pistons in the caliper back so that the new, thicker pads will fit in.
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First, you should remove a bit of brake fluid from the system. As the old pads wore down, there was room for more fluid in the system and the level was likely topped off. With the new thicker pads in place there will be more fluid in the system that there is room for, potentially.
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Begin with this process by removing the cap on the brake fluid reservoir.
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With some fluid removed and the top left off of the brake fluid reservoir, use a large pry tool to gently pry the pistons back in to the body of the caliper.
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Always use the flat surface of the pry, never the tip, and try to push the piston back in as straight and evenly as possible.
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Alternately, you can purchase the proper brake caliper piston compression tool from Mercedes...but this pry bar technique works if you are careful.
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Repeat this on all four pistons. Watch the brake fluid level as your proceed to ensure it does not overflow the reservoir. Remove more if necessary.
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Insert the springs in the same way they were removed.
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Then insert the pins. It can be tricky to get the pin through the holes in the second pad especially if the pad is in the caliper a bit too far. It can help to use an allen key or something similarly long and slender to align the pads.
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Then, simply chase the allen key out with the pin.
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When you've finished, go for a test drive. Be sure to follow the bedding-in procedures from the manufacturer of your pads to ensure maximum performance. In many cases, this means moderate driving for the first 500 miles or so, with no aggressive stops. However, check with the manufacturer.
When you've finished, go for a test drive. Be sure to follow the bedding-in procedures from the manufacturer of your pads to ensure maximum performance. In many cases, this means moderate driving for the first 500 miles or so, with no aggressive stops. However, check with the manufacturer.
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