The grease on the disc brake of bicycle is common among us. Because the disc is exposed outside, it is very common to get grease on the disc. For example, when washing a car, the grease on the front fork or the impurities on the frame will be washed onto the disc without attention. Sometimes when riding outdoors, the grease on the front fork will be washed. They also don't pay attention to the possibility of splashing grease on the disc, and riding on rainy days can lead to other oil spills on the bike, etc.
The braking force of disc brake discs decreases dramatically as soon as they are stained with grease which is difficult to rinse off. Seriously, it will lead to the lack of braking ability and even make abnormal noises, which will make people annoyed. Not only the disc will be stained with grease, but sometimes the disc will also be stained with grease, such as replacing the disc. If you don't pay attention, you will make the tablets greasy.
The method of cleaning dishes with grease can be said to be relatively simple. It is not recommended to wash dishes directly on wheels. The whole dishes should be dismantled and then cleaned. The dishes can be washed with detergent. The detergent can be said to be a good detergent, whether oil or other solutes. Generally speaking, dishes are contaminated with detergent. The grease is basically lubricating oil, probably from fork oil, chain oil and so on.
If the disc is cleaned, there is still abnormal noise or braking force is the same, it is very likely that the disc is greasy, first check to see if the disc is depleted. It is suggested that professional disassembly tools be used to disassemble the disc, some need professional disassembly tools, some can be disassembled directly.
When disassembling, we should first ensure that our hands are clean and not stained with oil. Otherwise, it will cause the second contamination of the shield. The shield can be divided into two kinds of materials, one is resin shield, the other is metal shield. If resin is used to contaminate the shield to grease, it can be said that it needs to be replaced, because the line is right. Resins are difficult to clean grease from tablets.
If metal is used to contaminate the tablet to grease, the grease on the tablet can be cleaned up, if conditions can be replaced directly, the first cleaning can be done with degreaser at first. What should we do when there is no degreaser? When there is no degreaser, we can use detergent instead and soak it with detergent. After a few minutes, clean with toothbrushes and other tools.
After cleaning with detergent and then using sandpaper for deep cleaning, the main thing is to grind the layer contaminated to grease, slowly, depending on the actual grinding thickness, after deep cleaning, then use detergent or degreaser for cleaning, to remove the impurities from the grinding.
Then wait for the tablet to dry and wipe with alcohol. It should be noted that it needs to be completely dried and the water evaporates completely. Otherwise, the concentration of alcohol will be affected. After cleaning, it will be air-dried again. Then it will be mounted for a test ride. At the beginning, there may be noise, or braking force has not been completely restored. Normally, after a certain distance, the noise will disappear and the braking force will be restored.
Another thing to note is that after cleaning the disc, the disc should also be cleaned once. I hope that the above cleaning methods can help you when the disc is greasy. There is no need to replace the new disc.