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Seals

Seals. Purpose. Keeps fluid where it is supposed to be High pressure Piston seals Accumulator seals Shaft sealing rings Valve body gasket Low pressure Pan gasket Output shaft seal Front pump seal Shift shaft seal. Types. O-ring Square-cut seal D-ring Lip seal Gaskets

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Seals

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  1. Seals

  2. Purpose • Keeps fluid where it is supposed to be • High pressure • Piston seals • Accumulator seals • Shaft sealing rings • Valve body gasket • Low pressure • Pan gasket • Output shaft seal • Front pump seal • Shift shaft seal

  3. Types • O-ring • Square-cut seal • D-ring • Lip seal • Gaskets • Metal-clad sealing rings • Butt • Lap • Interlocking • Teflon sealing rings • Full-round • Scarf cut • Butt

  4. O-Ring Proper O-ring Large O-Ring Small O-ring

  5. Square (Lathe) Cut Seal Increase Sealing area on the square cut seal

  6. D-Ring Less Contact Area = Less Friction Increased Stability

  7. Lip Seals Incorrectly Installed Lip Seal Correctly Installed Lip Seal Clutch Housing Piston Pressure

  8. Gaskets • Types • Cork • Cheapest • May soften over time and allow bolts to lose torque • Paper • Usually used on the valve body • Cork/Rubber • Rubber • Steel Cored Rubber • These are often reusable • If they are reusable, don’t replace unless damaged

  9. Metal Clad Sealing Rings • End joint types • Butt • Interlocking • Lap Butt Lap Inter-Locking

  10. Teflon Sealing Rings • Types • Full Round • Must be installed with a sizing tool • Scarf-cut • Butt Butt Scarf-Cut Full-Round

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