The whole back has to come off the dryer ..
First machine should be unplugged from the mains.
Take the top cover off.
Disconnect spades from wiring connector block on the back
Take off, bottom fan drive belt white cover...one screw..
remove the fan drive belt.
Take circlip off the centre rear drum bearing .
Disconnect wiring block that feeds the heater element....this is just to the left of the motor.
Undo all the bolts that hold the rear panel on, down the left and right sides.
Back panel should then, come off........and the belt is then accessible.
Note how it's fitted ,...if it's broke note the tension pulley it goes around.
Put the new belt on ..
whilst you are there ...remove drum ...IT'S NO EFFORT !!
and clean the areas at each end, where the drum turns...they will be packed with fluff.
Mark jones, February 2007