Clipped audio at -4db?

[D90]

Hey, that's a good idea to power by hand. I tried it, and yes, the hum disappeared.

Attached is a motor driven and hand powered montage of the same section of vinyl. Koz, could it still be the pivot well causing a hum, or does my experiment mean it must be the motor?

Even if I fix the hum, I'll still left with surface noise in the second part of the clip, is anyone able to help me EQ that?
I tried noise removal but it affects the main audio to much.