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a7tc spark plug. With a simple screw-on design, most motorbike owners can replace their spark plugs in just a few minutes, without the need for specialized tools or professional help.
What are oil seals?
Figure 14.3. Oil aging of fluoroelastomers.5 Chart shows percent retained elongation. Conditions: Aged at 150°C in Service Fluid 105 (oil changed every 168 h).


Most effective sealing is obtained with optimum shaft surface finishes. The sealing efficiency is affected by the direction of the finish tool marks and the spiral lead. Best sealing results are obtained with polished or ground shafts with concentric (no spiral lead) finish marks. If you must use shafts with spiral finish leads, they should lead toward the fluid when the shaft rotates.
Lift out the rags without dropping dirt into the engine, bores or passages.
A spring, the composition of which depends on the type
Types of oil seals include:
There are various sizes of industrial and ordinary oil seals, ranging from 0 to 33cm (13in). These varieties are also designed for different temperatures. As long as your seal matches the original equipment it’s intended for, you can be sure your machine will perform at its best.
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