Front is standard cart beaings, don't remember the number tho. Should be marked on the bearings.
Rear drive side is 9 1/4 inch loose ball bearings, into the freehub body ala shimano. Left side rear another cart bearing, another standard size.
Loosen the locknut on the right hand side, then unscrew the cone, axle comes out of left side, has a little shoulder on it for the LH cart bearing. The only 'gotcha is the right hand cone and lock nut A little stepped affair that is unique to this hub(as is the axle).