motor problem after renewing bearings?

hi, ok i have just renewed my hotpoint washers drum bearings, put it all back togther drum turns lovely no leaks, but now the motor wont agitate but spins fine exept on the very fast spin (1400) the motor arc`s and trips the house rcd! it was fine before i stripped it down to do the bearings, what have i done!! (i left the motor attached to the plastic drum when i did the bearings could i have disturbed something in the motor?)