2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 110Get this manual
LUBRICATION SYSTEM Install the pump spacerInstall the drive pin and inner rotor C, aligning the pin grooves with the drive pinDRIVE PIN INNER ROTOR C
SPACER Install outer rotor CInstall the relief valve, spring and spring seat