Yes it had the 4 way hydro sweep. Growing up my aunt had a KA with the single blue(cast iron?) wash arm. Later in 1971 my parents bought a KA superba with the 4 way hydro sweep. When I moved to my own apartment it had a newer version of this same machine but still had the hydro sweep. In the early 1990's the house I bought had a KA and it had the hydro sweep. Then In 1995 this current house I bought had an older version than my previous house. I guess what I noticed was that this last one had different racking than the previous and it just didn't hold as much, plus the previous one had a separate spray arm for the top rack so the performance was a bit better. This model was the basic model so perhaps it didn't have the same amount of sound insulation as the others. I knew these were tanks and this was what I was looking for in a new machine but I just couldn't find that build anymore..not even in the new KA of the mid to late 1990's. After doing research I ended up buying a Miele G885 which I kept until a 2006 kitchen remodel and then replaced that with a G2830.
What I really wish was that I had kept my parents KA DW from 1971. That Dw cleaned very well and was very fast doing a prewash, rinse, main wash and 3 after rinses in less than 22 minutes. Of course it also used 15 1/2 gallons of water to do this. I did keep the owners manual but I allowed the DW to be sold with my parents house when they died and the new owners promptly discarded the machine even though it was still working some 30 years after being installed. After finding this forum I realize I should have kept that machine.