2005 Polaris Sportsman 400/500 Service Manual, Page 101Get this manual
Crankcase Sealant: (PN 2871557)
Sealing Washer Sealing Washer (Copper or Aluminum) Coolant Drain Bolt
WATER PUMP MECHANICAL SEAL INSTALLATION
1Clean the seal cavity to remove all traces of old sealer2Place new mechanical seal in the seal drive collar, and install on the pump shaft3Screw the guide onto the end of the pump shaft4Install the washer and nut and tighten to draw seal into place until fully seated5Remove the guide adaptor using the additional nut as jam nut if necessary
Oil Seal Impeller