What do u mean by a crankshaft pulley tool??
Do u mean a chainwrench?
They should sell a chainwrench at an autoparts store or at a hardware store...
I HIGHLY suggest u get the right tool, b/c u don't wanna break anything while trying to take off your pulley... Or it will be a real pan in the ass!!
It doesn't matter what your weight is while stepping on brakes, they're hydraulic...
The Newton-Meter unit comes from the multiplication of force*distance...
there is no "moment arm" when u step on brakes, only force that is stopping pulley from turning is the shear force of the piston of your brakes and the rotor... Not good...
chainwrench is about 40 bucks, I had to buy one, along with 2 ratchets and 2 breaker bars. So, consider urself lucky if u get it done without breaking anything...