JobSheet 25 - Job Sheet 25 25 Name Date Servicing Oil...

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Job Sheet 25 Name _______________________________________ Date ________________________ Servicing Oil Delivery Seals Upon completion of this job sheet, you should be able to inspect oil delivery seal rings, ring grooves, and sealing surface areas. ASE Correlation This job sheet is related to the Automatic Transmission and Transaxles Test’s Content Area: Off-Vehicle Transmission and Transaxle Repair, Gear Train, Shafts, Bushings, and Case. Tasks: Inspect oil delivery seal rings, ring grooves, and sealing surface areas. Tools and Materials Petroleum jelly Crocus cloth Seal driver tools Feeler gauge set Procedure Guidelines Three types of seals are used in automatic transmissions: O-ring and square-cut (lathe-cut), lip, and sealing rings. These seals are designed to stop fluid from leaking out of the transmission and to stop fluid from moving into another circuit of the hydraulic circuit. O-ring and square-cut seals are used to seal non-rotating parts. When installing a new O-ring or square-cut seal, coat the entire surface of the seal with assembly lube or petroleum jelly. Make sure you don’t stretch or distort the seal while you are working it into its holding groove. After a square-cut seal is installed, double check it to make sure it is not twisted. The flat surface of the seal should be parallel with the bore. If it is not, fluid will easily leak passed the seal. Lip seals that are used to seal a shaft typically have a metal flange around their outside diameter. The shaft rides on the lip seal at the inside diameter of the seal assembly. The rigid outer diameter provides a mounting point for the lip seal and is pressed into a bore. Once pressed into the bore, the outer diameter of the seal prevents fluid from leaking into the bore, while the inner lip seal prevents leakage
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JobSheet 25 - Job Sheet 25 25 Name Date Servicing Oil...

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