A cracking solution
AFTER problems emerged about a year ago with cracking on the Hitachi-built Class 800 fleet – which was later discovered on the company’s other Class 80x types and, to a lesser extent, on Classes 385 and 395 – a plan has been devised to fix the issue that led to mass cancellations of services and widespread disruption when first discovered. An in-depth report by the Office of Rail and Road (see page 6) found a prevalence of cracks close to the yaw damper bracket and anti-roll bar fixing points in the area where the load of the vehicle is transferred to the bogie. This fatigue cracking followed from the area experiencing greater loads than allowed for in the original design, with other factors possibly contributing to the stress. It is not yet…