Types of oil seals include:
- Before installing the new spark plugs, it is important to check and adjust the gap to ensure proper ignition. Use a gap gauge to measure the gap between the center and ground electrodes of the spark plug. Refer to your vehicle's owner's manual for the correct gap specifications.
Type 2 - weather-resistance demanding sealing equipment and various high vacuum sealing processes. With the development
Figure 9: Items relating to oil seal characteristics
Want to learn more? Read “Oil Seals 101, Part 2”.
Fluorine rubber (FKM, Viton™)
Sealing of lip type seal is normally a result of an interference fit between the flexible sealing element, usually augmented by spring pressure and a shaft. Fluid retention is based on the precise amount of lip contact pressure. In most lip seals, increased fluid pressure in the sealed area causes lip contact pressure on the shaft to increase.
Shaft Hardness

Description
Heavy Duty Wheel Seals and Agricultural Equipment Seals can be divided into AP type, CRS type and ST type. Mainly be used in heavy pollution of agricultural machinery, construction machinery, mining equipment and trucks, buses and other environments. Compared to TC type, with special internal lubrication design, making it closed to the rotary shaft seal and bearing assembly which prevent external dirt effectively; a specially designed multi-lip inside the seal, makes it to achieve the function. Multiple external sealing lip design effectively prevents outside dirt and grease leakage immersion; the internal high-quality grease (butter) prevents muddy and water immersion.
