No leak seal system for irrigation wheel-drive gearbox

An irrigation drive line gearbox comprising:

• a. a irrigation drive line gearbox housing forming an output cap with an output shaft aperture therein and an input cap with an input shaft aperture therein;
• b. a power input shaft rotatingly mounted within said gearbox and extending through said input shaft aperture;
• c. a power output shaft rotatingly mounted within said gearbox and extending through said output shaft aperture;
• d. an output bearing mounted within said housing adjacent said output cap and rotatingly supporting said output shaft;
• e. an input bearing mounted within said housing adjacent said input cap and rotatingly supporting said input shaft;
• f. a silicon carbide output face seal disposed within said housing, wherein said output face seal is disposed along the output shaft and is compressed between the output bearing and the output cap;
• g. a silicon carbide input face seal disposed within said housing, wherein said input face seal is disposed along the input shaft and is compressed between the input bearing and the input cap;
• h. wherein each of said face seals comprises a first element and a second element, said first element defined by a cap end and a face end, said second element defined by a boot end and a face end, wherein the cap end of the first element seats within said cap and the boot end of the second element seats against said bearing and the face elements are urged against one another to form a sealing interface.