Proper spindle nut tightening is a very important thing, and I can’t stress this enough. This nut must not be too tight or too loose. That said, it's not rocket science and you don’t need any special tools.
Take a wrench and snug the spindle nut down until you feel resistance when you turn the rotor (21 ft-lbs). Then back the nut off a half turn until you feel it loosen up. Now move to the next photo # 48.