Les' tips are first rate.
To be avoid losing the plug behind our washing machine I put it in a mains extension cable - this allows me to get the dryer out three feet clear of the worktop.
Empty the water out of the reservoir first!
I use a couple of rectangles of carpet about four foot by one foot to get the machine in and out without wrecking the lino or my back. I tip the machine back and forth to get the mats to go under the feet.
I found it easier to put the machine on a couple of old cushions on its face. I also vacuum all the fluff out of the machine, and carefully apply a bit of grease to both surfaces of the bearing (this is just below the split spring washer - which comes off with the turn of a medium screwdriver). I replaced the bearing once as it had worn into an elliptical hole, but I've not had to do it since greasing it each time I change the belt.
With the machine face down it is easy to lift out the drum and remove fluff from the circular slot that the drum fits in.
I also get the tiniest bit of grease (don't tell my wife!) on the edges of the drum where it fits into the slot - but you need to be really careful not to get any on the part of the drum where the main belt goes.
I put the drum back, then fit the belt as Les describes, then fit the rear of the machine on the bearing, pressing the sheet metal down to get the two washers and the split washer on the shaft slot. Note that the rear of the machine is not screwed down at this point. Once I have the split washer in place I then can heave the back of the machine into position and get the screws around the edge of the back in so tensioning the belt.
I also tend to remove the fan/element cover to clean the dust out of there and this time I tried to get a little grease on the plastic fan bearing. I had to undo a couple of small cross head screws to get at it - I think I managed to poke a tiny bit between the plastic components - which I'm hoping will kill the squeak we have had from time to time. Again I was very careful to get none on the white plastic pulley wheel surfaces that carry the little green (ours has been replaced with a black one at some point) belt.
This little belt has to be in a figure of eight in the same direction as shown on the white cover.
Remember to reconnect the heater cable.
I don't know why but it seems to make quite a din when I first run it, but once it has settled in, it seems fine.
If it works buy a new belt, so that you are ready for the next time.