This Pump Assy.,oil is the most expensive of the items that make up this Oil Filter/oil Pump assembly.
Parts such as the Oil Filter/oil Pump: Oil Filter Cartri, Boss, Oil Filter, Pump Assy.,oil, Bolt,flange,6x25 are included in the Xl600v Transalp 1988 (j) Germany Oil Filter/oil Pump parts fiche.
In this schematic the "Collar,o Ring" is used most often.