Unable to fit belt LG WD-8013F Front Loader?

Hi, My manual doesn't cover repairs...I can't get a new belt on my 8013F front loader. As the other had snapped off, I don't know how it sat to begin with. I'm trying to put it over the big silver disc that covers the drum with the drum nut in the middle, down to the motor bit at the bottom. Is that right? It's about an inch or so too small and I just cant get it to fit.
Any help appreciated. Thanks, sim.