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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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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 • Metal-clad sealing rings • Butt • Lap • Interlocking • Teflon sealing rings • Full-round • Scarf cut • Butt
O-Ring Proper O-ring Large O-Ring Small O-ring
Square (Lathe) Cut Seal Increase Sealing area on the square cut seal
D-Ring Less Contact Area = Less Friction Increased Stability
Lip Seals Incorrectly Installed Lip Seal Correctly Installed Lip Seal Clutch Housing Piston Pressure
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
Metal Clad Sealing Rings • End joint types • Butt • Interlocking • Lap Butt Lap Inter-Locking
Teflon Sealing Rings • Types • Full Round • Must be installed with a sizing tool • Scarf-cut • Butt Butt Scarf-Cut Full-Round