sentences:  However, the electrification to the freight yard had been removed following the withdrawal of the EW locomotives in the late 1980s and the EOs general lack of reliability seemed to preclude their use.It is believed that the unreliability issue stems from the use of the EOs as passenger locomotives, as they are in effect lower-geared freight locomotives.During their time in passenger service, the locomotives were required to run at speeds of up to 90km/h, a speed which they would never have reached in service while at Otira.