Jabsco part # 6408-0000 Mechanical Seal

The Jabsco 6408-0000 is a Mechanical Seal for a Jabsco Pump. MECHANICAL SEAL REPLACEMENT
Shaft Seal Replacement: Remove end cover, gasket, and impeller as outlined above. Loosen cam screw and remove cam . Remove wearplate with screwdriver of hooked wire. Older models of this pump were fitted with a shaft seal that was compressed by a wave washer type compression spring. When replacing this older seal assembly with a new style seal that is compressed by an integral coil type spring, remove and discard the wave washer. Using a hooked wire, and taking care not to scratch shaft of seal seat bore, remove all components of seal assembly. Inspect shaft and seal seat bore to be sure sealing surfaces are free of nicks or scratches. Clean shaft surface behind splines to insure proper O-ring seal on shaft. Apply a light film of grease on shaft surface behind spline area. Thoroughly clean seal faces of all grease, oil or particles this will insure that seal faces will turn freely on startup. Place ceramic seat assembly in body with boot first. Use care not to damage ceramic surface. Be sure ceramic and boot are bottomed squarely on body bore. Slide carbon ring assembly, with carbon facing ceramic, over the shaft and firmly up against the ceramic seat. If carbon portion of seal does not have an integral coil type tensioning spring, slide wave washer over the shaft and against the rubber boot on metal case containing O-ring and carbon. Replace wearplate, aligning notch with dowel pin in body. Apply a thin coat of sealant to top of cam and threads on cam screw and install in impeller bore . Replace impeller, gasket and end cover. Tighten end cover screws. Tighten cam screw