Thanks, Grumpy.
You are correct in identifying the Axle Beam on my model as listed in Illustration 5 in "Evolution 14-32.pdf". Mine is the 13 HP Honda motor, therefore my model is a 13-32.
The illustration for the slotted plate, however, is not precise, but is from an Evo 2 Manual, since the aforementioned Manual doesn't show it very clearly (It is Part 32, GT6357 in the actual Manual. I just copied it from an Evo 2 model to illustrate the similar arrangement of the curved slots.)

For comparison, I have another Greenfield, an Evo 111, which has two threaded "pins" as you suggest, that are integral to that Axle Beam. On that Evo 111 Model, the Backing Plate is integral to the Chassis, and has a further "Backing Strip" behind that, through which the two pins pass. On mine they have nuts on the pin ends. For illustrative examples, see the following extracts from the pdf Manual for the Evolution 3 12-5HP 32-30. p.1 #15 is a "Backing Strip"; p.5 #20 shows an Axle Beam with two "pins"

Your suggestion that these pins serve only to limit the range of movement of the Axle Beam is a good one. I'm intending to attach nuts to the end of the Pins very loosely, and rely on Locktite to stop them falling off, although perhaps nuts aren't required at all. In any case the central pivot bolt stops the Axle falling off!

Many thanks smile

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