This Pump-assy-oil is the most expensive of the items that make up this Oil Pump assembly.
Parts such as the Oil Pump: Gear,oil Pump, Shaft,oil Pump, Pump-assy-oil, Bolt are included in the En400a2 Vulcan 1986 Canada / Liquid Cooled Oil Pump parts fiche.
The component with the lowest price in the OIL PUMP schematic is the Circlip-type-c,11mm.