You
might be lucky and find an AB member who is an expert about such things.
Alternatively, you could invest a tenner in membership of the Vintage Horticultural & Garden Machinery Club and
definitely find others who can help you. (Their home page even includes a photograph of a MonroTiller, owned by a member, so you'd certainly be in the right place):
http://uk.geocities.com/[email protected]/
Alternatively, there's a guy called Andy (who describes himself as a 'MonroTiller enthusiast') who has renovated several machines and who is offering advice to fellow enthusiasts. His phone number and e-mail address are here:
http://www.brookfield-tractors.co.uk/cgi-bin/b oard_single.cgi?key=452
Chris