2000-2003 Honda TRX350 Rancher factory service manual, Page 73Get this manual
LUBRICATION SYSTEM Check the spring and valve for wear or damageRELIEF VALVE Install the valve, spring and stopper plate into the oil pump, then insert new cotter pin from the pump body side (outside) and secure itSPRING
STOPPER PLATE
DISASSEMBLY
Remove the bolt and separate the pump base from the pump spacer