G'day John and Mod BB
The manuals on this forum cover the Model 430 and 590.

The more rare must be yours - the Model 430.
https://www.outdoorking-forum.com.au/forum/u...-bonnar-manuals-parts-list.html#Post6371

I have been intrigued by the Diplomats for decades.
Against all odds, Scott Bonnar attempted to redefine the reel mower.
Had the budget just been a bit bigger ...

Hope this helps.
-------------------------------
Jack

p.s. pulleys will be screwed on, some with LH threads