never mind! I've found the answer. Dismantle the whole machine.
Why do they make such complicated set ups for such simple machines??
If you get it done by the agent it costs more than a motor car to fix.
thanks for any consideration given.
BP
Bill Price, January 2009
edit
I can answer this question...
How do I change the two upper belts on my MTD 11.5 hp B&S?