If the vertical gear is damaged you will need to change it otherwise it will ruin the other gear, you will need to retime afterwards, quite simple to change and the gears are quite cheap, oif you are in the US www.tandtrepair.com will help you out with the gears, when you are ready to retime it e-mail me drivewithken@blueyonder.co.uk and I will send instructions on an attachment.
Ken
drivewithken@blueyonder.co.uk
December 2007