Internal rust can cause the caliper pistons to become sticky, jam, or even lock up. Brake fluid leaking from the caliper can contaminate the brake pads reducing performance or can even lead to a loss of hydraulic pressure that may cause the brakes to completely fail. This complete package reduces the risk of leaks, uneven brake pad wear, and many other potential problems.Ĭaliper hardware and piston seals do not last forever, and once a leak starts to develop, the caliper needs to be replaced or rebuilt. A loaded caliper will have a new brake pad pre-installed in a professionally re-manufactured caliper with matching hardware all included. Not necessarily every time you park.but more than I bet you use it now.The main benefit of loaded caliper assemblies is to restore the brakes to new condition. The best thing you can do for your brakes with this type of rear caliper is to get into the habit of using the emergency brake. Most of us have the park it and walk away mentality. Using the emergency brake can be very difficult to remember. Scenario #2 – The sprag can seize inside the piston and possibly stop working. If this happens, the brake pedal will feel very soft. Scenario #1 – You will start to lose service in the brakes because the caliper piston is traveling more to reach the brake rotors. What would happen if you don’t adjust the calipers to begin with or you don’t use the emergency brakes? Usually one of two scenarios will exist: With the pads closer to the rotor, additional fluid volume isn’t required to move the pads further and then possibly run out of volume and never properly squeeze the rotor. This moves the piston outward taking up that distance between the rotor and the pads. This ratchets the caliper piston outward just like using the emergency brake would do. To adjust initially, the piston is adjusted outward by turning the nut on the lever or by cranking the lever. It also equally as important to have the calipers adjusted correctly to begin with. So yes, it is important to use your emergency brake. When the distance is 0.030”, the sprag turns inside the piston adjusting it outward and keeping the rear brakes properly adjusted. When the parking brake is applied, the sprag will recognize when there is 0.030” or more clearance between the friction material and the surface contact area on the brake pad. The calipers use a “one-way clutch” or “sprag” inside the caliper piston. When the pads wear and material is removed, the pads then become further away from the rotor surface. You might ask “If you don’t need it and therefore don’t use it, why is that a drawback or a problem?” In fact, some people don’t even have the emergency brake hooked up. I can say this from previous guilt on this subject. Many people in the classic car/hot rod don’t use the emergency brake. It is a very good caliper that will work for many different applications. One of the most common calipers used in the aftermarket today in many companies disc brake conversion kits are the exact same General Motors based calipers we use in ours.
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