Hi Arty,
The 1948 mower has no model name and was just known as the Atco 20” motor mower. The date and cut width were the identifiers.
In terms of the questions:
1 & 2 - There are no assembly diagrams but these models have parts books that do show all of the components.
3 - Decals are available from a couple of suppliers. There is a fellow in SA that makes them but they are also available from the Old Lawnmower Club.
4 - Catchers/grassboxes are not the easiest to find for these particular mowers. Unfortunately, I do not have a template for either one. However, I know that they were made of aluminium and were well built (there was a steel version of the earlier box but I am not sure of the production dates). Both were different in design and had very different methods of attachment to the mower. The 1948 model had mushroom head pins (like the head of a coach bolt) on the side of the box that fit into slots on the mower frame. The 1952 model box had hanger brackets that hooked over the main spreader bars of the mower frame. The brackets also had an angled section that rested over the main side frames of the mower to keep it in position.
Kind regards
Sir Chook
