I assume you mean 60 deg C (140 deg F). This is not a temperature that would make me overly concerned but since I don't know the previous history I would ask you if there was any recent maintenance that might explain?
There are several main reasons for high temps: Poor lubrication, excessive lubrication (I find this to be unusually common but more typical of greased bearings), improper preload (these are duplex paired - which requires a preload design). Was this properly applied? Finally, high levels of misalignment can result in this condition.