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Table 8: Housing design checklist
• SIM method to prevent the spring from falling off (integral molding of spring and rubber)
DIN
ERIKS
DIN

changing spark plugs.
As can be seen from the seal cross-section shown in Fig. 14.2, shaft seals are complex shapes that require advanced mold design and molding techniques (see Section 7.3 for discussion of fluoroelastomer molding). For some time, most shaft seals were made in the United States by compression molding. Injection molding of shaft seals is prevalent in Europe, and is being used increasingly in the United States. An advantage of compression molding is that preforms (usually rings cut from extruded tubing) are used that closely approximate the amount of stock required for the final parts, so compound waste is minimized. For injection molding, the amount of cured stock in the central sprue and runner (actually a thin sheet leading to the seal lip) is often large compared to the stock required for the final part, so the waste of high-cost fluoroelastomer may be high. Such waste is reduced in modern injection molding designs.

porcelain spark plug. The ceramic material used in porcelain spark plugs provides excellent insulation, preventing the electrical current from leaking out and ensuring a consistent spark every time.
You may need to turn the crankshaft so that it protrudes less. Turn the front pulley bolt with a spanner or socket.
Select your oil seal type according to Table 2.


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