PCO
There were four PCO vans, numbered 1 - 4. They were Joint Stock vehicles owned and maintained by the VR and SAR and later administrations of AN, VicRail and V/line.
The Overland required 'Head End' power for heating and lighting. These vans were fitted with diesel generators.
PCJ
During 1995, V/line took over control of PCO 1 and 3. These vans became PCJ 491 and 492 respectively.
The vans were used for HEP equipped trains when hauled by non HEP equipped locomotives.