I have stuck with SS. (My last post in this thread was 2014, wow.)
In part because I can't afford the investment in a processor, which would be a hakki pilke or Jappi.
I split wood well into January 2021. Not doing more was not related to SuperSplit, but to using pallets in the winter which is troublesome with snow build up on bottoms, freezing to the ground, and getting around with forklift.
SuperSplit: I'm using original model bearing on the push plate. Casey did give me sealed bearings I used for a couple years which also worked great. I lube with WD-40 before, during and after splitting.
In addition, the splitter is used in one spot with a conveyor and PackFix. The SS also has a 4-wheel mod, so the table end is slightly higher than the flywheel end on flat ground. Also where I split, the slightly elevated table end is maintained. Pretty sure this positioning is suggested in the owners manual.
The other thing about SS, seems to be, the more it is used the less issues with retracting. Initially this has to do with wearing the paint off. Continued use probably wears in the brass skid plate part of the push plate, and the side plated/beam.
The most common problem I initially had was top beam tracking, which caused side pressure rubbing the beam. Very minor taps, side adjustments, on the top bearing support arm solves this. Usually needed if the push plate is side torqued from the butt end of a round not being square cut and jamming the extended push plate. The tracking use to bug the crap out of me the first year or two. Tracking is not an issue these past years. The inside of side plates are worn/grooved slightly which is probably a helpful thing as well. Seven or eight years, just broke in.
I've replaced push plate bearings, bump stops once, top beam bearing, belts, and engagement bearings once. Don't replace engagement bearings if not needed. I did so as maintenance after several years, and it was a pain. Also replaced the rod guide for the engagement handle. Replaced the Subaru engine with a Honda. The Subaru float stuck and was leaking fuel. Shop turn around time was a week and a half. They had a Honda GX 200 on the shelf. I was splitting a couple hours later. Two seasons later I tipped the splitter over and got oil up in the topped of the Honda. Pulled the plug ten times at least and got it running, then swapped out for the Subaru, to clean up the Honda.
With winter/spring things are just wet so debris accumulates on the beam. Just need to clear it more often and keep splitting. I use a piece of lath from the spring end once in awhile as it piles up in the tunnel more when wet.
I run the belts looser than previously. I would get belt dust on the housing. I date the belts with a paint stick, and also oil change dated. The flywheels get grease bi weekly when splitting a lot.
I had a back log having not sold firewood in 2020, and sales dropped off last year. Total splitting last year was maybe ten cord.
I just went through the splitter annual clean up/maintenance last week but have not split yet. Beam is rusty, but everything seems good. Light treatment this week on scalp at dermatologist. No sun for me for several days.
If your having trouble check Harold Anderson's post #61.
Looks like a great idea to get a light grease in there.