(27 Feb 2015, 11:06 pm)DaveyBowyer wrote Well judging by the 57 plate E400 examples at Ashington, normally before 7 years. Look at the state of Washington's B9 Geminis 6001 - 6007 (Jul 2011 first service and always been on the X1) then look at the state of Blyth's and Belmont's Cummins Engined VDL Gemini deckers (first service Jan 2012 mostly for the 308 then only used on X10 / X11 after March / April 2013). That says it all basically.Ah okay
Without this turning into a "how stuff works" bit, would you be able to briefly explain what they do, and why it's bad if they break? Tried to look at Wikipedia but that just confused me
cheers