Some items from this specific schematic: Bolt (583 Oil Drain), Spring, Compression (3y1), Cover, Pump Gear, Cover, Oil Element.
The most reasonably priced component used on the Ttr225 Ttr225c 1999 (x) Usa California Oil Pump is the Screw, Pan.
This schematic depicts all components used in the Ttr225 Ttr225c 1999 (x) Usa California Oil Pump partslist.