remove the big nut in the middle of the drum, then with the handbrake off slide the drum over the rear brake shoes, can be bit of a c*nt so use a mallet.

with the drum on a bench/vice lever out the dust seal, then tap out the bearings with a screw driver but dont fuck up the mating surfaces

turn drum over and do that side.

to push new bearings in, use and old one and big bit of tube to drive in square, then tap out the old bearing, do the same on the other side

gease up the bearing races and insert it into the inner bearing and put the new dust seal in

adjust the rear brake shoes by using a screw driver to release the pawl and move the shoes together a bit

refit the drum to the hub

then fit the outer bearing race and big washer

then stick the new nut on and hang off the torque wrench to tighten, needs to be 290N/M iirc

put whell back on and pump the brakes a few times to re adjust them.

jobs a goodun