Use an IC2 wrench or the omniwrench.
Omniwrench.
It doesn't require energy, yet works as the electric wrench on silky smooth mode.
Using a normal wrench might cost you your machine. If you're using the electric wrench, press M + right click to change mode to lossless before you use it. It'll give ya a little message that it's in lossless mode.
In case M doesn't work, go to ESC -> options -> controll and change your "Mode select key" to something else than M, I'm using N.