Just to clear matters up, there has never been a Model 45 Service Manual, only an Owners Manual which had an exploded parts diagram in it. It's always been a bone of contention as to why no Service Manual on such a complex domestic machine was never produced and that's I guess why we get so many questions here at the ODK regarding this and all the other Scott Bonnar models made over the years.
G'day folks,
I was pretty sure that no Service Manual ever existed for the SB45's, as you confirm. The Rover-era 45 Owners Manual [found as a free Web download] covers the basic adjustment and lubrication aspects of servicing, but doesn't include any parts list or exploded diagrams. Which I'd say is what Swiftdevil is after.
There is a PDF file in the SB Manuals section of the ODK site
here titled 'Scott Bonnar.pdf Description: Scott Bonnar Spare Parts List for 14" 17" & 20"' which I think may be the IPL for the 45's, but as I've said, I can't open it to check if this is the case.
Edit: Here's a downloadable IPL for the Rover 45, which should be of some help:
https://www.outdoorking-forum.com.au/pages/rover/roller_mowers/Rover%2045%20Cylinder%20Mower.pdf 
