Try it Oily's way?
John has described the correct way the belt should run.
MAKE SURE THE MACHINE IS NOT CONNECTED TO THE MAINS SUPPLY!
The easy way to get the belt on, is to hold the belt around the pulley as decribed with one hand, then with the other hand, reach over and, starting the belt on the drum, rotate the drum clockwise (thats clockwise from the back of the machine). BE VERY CAREFULL NOT TO TRAP ANY SKIN OR DIGITS IN THE BELT/PULLEY down the bottom!!!!
It will be found that the drum rotates easily as the belt falls into place (it may be neccessary to do some final adjustment of the belt position on the shaft at the last knockings). Before replacing the plastic cover and the lid (top) run the machine to make sure the belt positions itself in the right place.
The tension spring tensions under the motor from left to right when in the correct position.
Good Luck, and mind your fingers! You will need them to count the cash you have saved!
Oily Royally, October 2010