By the mid 1950's, many passenger trains were still screw coupled. The new diesels in service were equipped with auto couplers only. A group of vans were fitted with steam loco swivel couplers which allowed the vans to act as transition vehicles between the engine and screw coupled carriages.
Railway records do not date the modifications. To indicate the dual coupling arrangement, the vans remained coded as _Z__ but were were lettered with a 'P' in the corner to denote 'Plural' couplings. The vans were ballasted with 3 tons of rail, no doubt to improve the riding quality. The ballast was lengths of rail along the floor with a false floor covering the rails.
From 1956 the vans were recoded to ZP. Despite the 'P' in the corners, the vans were only authorised for a maximum speed of 60mph ( WTT Addenda 28/6/1971 ).
With limited traffic in the 1970's, the vans had the ballast removed, speed derated and were recoded to _ZD_.
The ZP numbers were:
19, 31, 33, 56, 85, 153, 181, 182, 184 187, 190, 194, 197, 198, 206, 211, 212, 215 222, 224, 227, 237, 239, 240, 253, 260, 468 - 471, 494, 498 - 500, 585, 599 - 601, 603 604, 611, 619
Vehicle history list
Photos for 'ZP '
FileID Description................................................DF065 ZP - headstock detail: dual cpld/buffers notched, 1950s, [sPHD]DF064 ZP 215 - cupola end/dual cpld, no lettering in corners, 1950s, [sPHD]CQ843 ZP 215 - headstock/buffers/dual loco coupling, 1950s, [sPHD]CQ842 ZP 215 - loco coupler/notched buffers, no P in corners, 1950s, [sPHD]AS070 ZP 239 - OVERHEAD ONLY, North Melbourne C&W Shops, c1975, [oPJV]BC183 ZP 239 - Overhead traffic, North Melbourne C&W, 17/10/1976, [oRXO]AU875 ZP 239 - part view, North Melbourne, 2/1977, [oPJV]BK756 ZP 469, Castlemaine, 29/6/1975, [oPJV]BK757 ZP 469 - transfer of WW 75, with ZP 494, Castlemaine, 29/6/1975, [oPJV]BK760 ZP 469 - veXp, Castlemaine, 29/6/1975, [oPJV]BK759 ZP 469 - veXq, Castlemaine, 29/6/1975, [oPJV]AU879 ZP 469*- part view, Bendigo, 18/2/1977, [oPJV]BL073 ZP 470, Newport Goods Yard, 19/9/1975, [oPJV]AG148 ZP 471 - lettering, [oDVS]AG127 ZP 471 - lettering/couplers, 1960s, [oDVS]AS071 ZP 494, Castlemaine, 29/6/1975, [oPJV]BE936 ZP 494, Castlemaine, 29/6/1975, [oPJV]BK196 ZP 494 - sXp, Castlemaine, 29/6/1975, [oPJV]BC199 ZP 619, Woodend, 13/11/1976, [oRXO]
No diagrams found for ZP
File c055m compiled by Peter J. Vincent, updated 13/4/2007