- One of the key benefits of metal oil seals is their durability and resilience. Made from high-quality metal materials such as stainless steel or carbon steel, these seals are able to withstand high temperatures, pressure, and wear and tear. This makes them ideal for use in demanding industrial environments where they are exposed to harsh conditions.
On some engines you have to remove the clutch-housing cover to reach the rear nuts.
For more information on the characteristics of Oil Seals click on some of the links below:


NBR
There is a British Standard laid down for the control of synthetic rubbers. BS 3574 (1989) helps to determine shelf life – for instance, Nitrile (NBR) and Polyacrylic (ACM) are Group ‘B’ rubbers and have a 7-year life, whilst Silicone (VMQ) and Fluoroelastomers (Viton®) are Group ‘C’ rubbers and have a 10-year shelf life. PTFE and Leather do not come into this category but like the others should be kept in the original packing for as long as possible away from direct light, dust, and humidity. Ozone, which can also be produced by battery-driven forklift trucks has a very bad effect on synthetic rubbers. Finally, protect the sealing lip – DO NOT hang the seals on nails, wire etc.
Different Types Of Bearing Seals
The black color of these spark plugs is a result of carbon buildup, which is a common issue that can occur over time due to normal engine wear and tear. This carbon buildup can negatively impact the performance of the spark plug, leading to misfires, rough idling, and poor fuel efficiency. It is important to regularly inspect and replace black spark plugs to ensure optimal engine performance.
JTEKT provides special seals for use in a wide variety of machines and applications.
Table 5 lists the major special seals, their shapes, and their features.
* KOYO is a registered trademark of JTEKT.