Not that hard a job if your handy with the spanners no special tool needed. take the hub off and you will see the cap that covers the bearing theres a big nut you need to undo i think it's a 23mm not 100% sure and then you will see the bearing take it out and pack the hole with grease and smear some round the bearing then put it all back together and see if that works if not it's probley where it' to low. DONT GET ANY GREASE ON THE BRAKE SHOES