Well the way I remember is when the motor is running it tightens the threads. The pump is the male side and fan is female. If you had a wrench on the pump side from the top it would need to be turned toward the drivers side. Wrench on the fan from the top would go to the passenger side turning the fan so it would blow the wrong way.
How was that for a long way to say it?lol
I use an air hammer with a center punch to pull them and they come right off. Or you can buy or make a wrench set for it. They are thin and the one for the pump fits around all 4 pulley bolts. Hope that helps.
My baby is a one of a kind.
1977 I bought a new 76 F150 club cab.
Sitting on a 84 F350 6.9 4X4 chassis
With all the drive train and goodies from a 95 4X4 4door PSD.
Nothing stock left on her and not a nut, bolt, hose, or wire on there that I didn't put where it is.
The Wifes Ride:
2002 Excursion Limited 7.3 PSD
Themo King/Mikuni coolant heaters on both to keep things toasty without idling.