sixteen components are listed in the schematic for this Atc185s 1983 (d) Usa Oil Pump .
Some items from this specific schematic: Cover Oil Pump, Plate,oil Pump, Roter Oil Pump In, Bolt, Hex., 5x20.
This OIL PUMP assembly utilises two O-ring,9.4x2.4(s) - the highest specified component.