The Bigbee Line Posted January 6, 2015 Share Posted January 6, 2015 I'm looking to buy a class 153 underframe. There's some confusion because of different part numbers for what I thought was the same item. Any idea why? Link to post Share on other sites More sharing options...
jsp3970 Posted January 6, 2015 Share Posted January 6, 2015 I have noticed this myself, seems that parts got different numbers when they switched to production in China. It does take a bit of checking through the service sheets to see which parts have different numbers. Link to post Share on other sites More sharing options...
Rob Hayes Posted January 7, 2015 Share Posted January 7, 2015 I believe it simply is down to different production runs, always best to check the service sheets and any numbers stamped on the parts. Good luck Link to post Share on other sites More sharing options...
sandwich station Posted January 7, 2015 Share Posted January 7, 2015 I'm looking to buy a class 153 underframe. There's some confusion because of different part numbers for what I thought was the same item. Any idea why? I don't know about it so much now but when I lived in the UK and bought loads of spares repairing old bangers I'd bought (15+ years ago), if the part you were after had more than one part number and or more than one service sheet, then for some reason it had been superseded ie: small modification or different part altogether. Link to post Share on other sites More sharing options...
RMweb Gold Andy W Posted January 7, 2015 RMweb Gold Share Posted January 7, 2015 I suspect this is likely to become even more of a problem as production is now spread over different suppliers. Some parts that were common across more than one model (not just multiple liveries on the same model) may end up with multiple part numbers if tooling for them exists in several factories at the same time. This is even more likely if the need to cut new tools has also given the opportunity to make minor changes at no additional cost. Link to post Share on other sites More sharing options...
The Bigbee Line Posted September 12, 2015 Author Share Posted September 12, 2015 I now have an answer to my question. I bit the bullet and purchased 3 different 153 underframes. The only difference is that the ends are painted to match various bodies..... The marks from where the mould was milled out (Those on the non visible part of the moulding) are identical. There is no part number impressed into the moulding either. Part X9973 is I think for a Central Trains model Another one (lost the label) is almost unpainted and shown under an Arriva body Another has white and yellow on both ends For the underbody detail on the mouldings they are good value for money. Although the arrangements are not the same I'm going to use a pair of frames to update a Hornby (Lima) 156. Probably a bit of cut and shut to move components around Link to post Share on other sites More sharing options...
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