First, remove the calipers. If it is a single-sided single piston, you need to prepare a large flat-head screwdriver and pull out the latch that fixes the brake pads. At present, the brake pads are basically fixed by bolts or shrapnel.
First, remove the calipers. If it is a single-sided single piston, you need to prepare a large flat-head screwdriver and pull out the latch that fixes the brake pads. At present, the brake pads are basically fixed by bolts or shrapnel.
After disassembling the brake pads, don't worry about throwing it away, to check whether the wear of the brake pads is uniform. Assuming that there is uneven wear of the brake pads (one side is thin and the other side is thick), you should check whether the piston is stuck, because the uneven movement of the piston will cause abnormal wear of the brake pads, which means your caliper It's time for maintenance..
After the brake pads are removed, clean the components of the calipers and remove things that should not be seen on the calipers, such as brake dust. Most riders feel that the moisture in the air is because the dust absorbs moisture and passes through the piston. The oil seal then enters the entire closed brake system, but it is not always the case. After the dust is combined with moisture and sand particles, it will become a colloidal substance, attach to the surface of the piston to make it slide more smoothly.
Since you want to clean the piston, of course, the more the surface of the piston is exposed, the better. Slowly press the brake a few times to completely withdraw the piston from the caliper, but the premise is to hold a piece of thing against the piston to prevent the piston from completely popping out. The caliper will cause a mess, leaving enough space to use a toothbrush to clean the piston. Use organic cleaning agents as much as possible, and avoid using corrosive cleaning agents to avoid damaging the O-ring of the piston, which will increase excessive friction of the piston.
Clean with a toothbrush and organic cleaner. The top of the caliper is a difficult place to clean. It may require a little skill. If you see any signs of brake oil leakage, buy a set of caliper repair kits and pay careful attention to the surface of the piston. If you see rust or dents, prepare to smooth or replace them. Once the calipers are clean, blow them dry with an air gun. When you want to put the piston back into the caliper, the solvent doesn't flow into the brake fluid.
