Axlebox bearing failure on Mk IIF coach fitted with APT-P wheelset (TM-PBS-23)

A MK IIF coach fitted with an APT-P trailer axle wheelset has been in service for life assessment trials of the hydrokinetic (HK) brake. On 19 Oct 81 the vehicle was taken out of service due to an axlebox bearing failure on the HK brake wheelset. An investigation carried...