2 Remove old grease and foreign particles such as fibers and sand from the O-ring.
➀ Wipe foreign particles off with a soft, lint-free piece of cloth.
➁ Dry the rinsed O-ring without wiping water again. This is to prevent fiber attachment.
3 Pick up the O-ring with your fingers and feel it carefully, exerting only light pressure, all along it to check whether or not there are any dents or flaws caused by foreign particles or cracks due to deterioration (you can feel these with the tip of the finger).
When pressing with your fingers and sliding them over the O-ring, be careful not to stretch it by pulling too tight.
Examples of foreign particles and damage
Hair | Lint | Sand Dents caused by | Flaw | Crack |
| | foreign particles | | |
4 Remove all foreign particles from the O-ring groove using a toothbrush or cotton swab.
Make completely sure that no waste lint from the cotton swab is left behind.
