I wouldn't worry too much about the dial now. The main thing is to make the receiver as reliable as possible and that recap certainly helped in this regard.
Is the hum too loud? there's always going to be some hum present in old tube gear. This is in sharp contrast to 1970s solid-state gear that featured high capacity, low voltage electrolytics. Back then, large capacitance was expensive, and the units used the minimum required for good performance.
Like Rockmonton suggested, it's also a good idea to check for a possible ground loop. Is the hum still present with all sources disconnected? If so, there's a grounding issue inside the receiver or the filter capacitance needs to be increased.