What is the Clydesdale ? Was that the manual side loader? I found some pictures of those by doing a Google Image search for "Wittke Side Loader" . The Crocodile was the automated SL, but the manual SL's I saw were not referenced by their trade name, just "side loader" .
Most excellent of you to upload the service manual, thus solving the mystery of the Clydesdale. I see that it was nothing like the current models, rather more in the vein of the "Haul-All" inverted Heil Colectomatic.
In fact, it looks so close to the Haul-All that I wonder if it is another case of the same design made under license by two different manufacturers. Do you know what years these were built by Wittke ?