I believe that you are either not using the Locktite product correctly, or not using the correct Locktite product. I would suggest Vibra-Tite Blue Threadlocker for the set screws. Make sure that there is no oil, grease, or any other contaminates in the threaded holes. I like to clean them with a shot of brake cleaner, and then run my tap through them to make sure that the threads are clean, and then a second blast of brake cleaner. I have been using my snowblower for over 15 years now, and all I do is to properly grease and clean everything. I will say that it isn't show room pretty, but it is as good today as the day that I bought it. I have gone through a number of shoes and cutting edges, but no major mechanical problems, other than those cause by outside forces, such as picking up a rock in the snow that will stop the blower in its tracks, and stall the engine. A couple of years ago, I disassembled the blower to replace bearings, and clean / paint the inside of the blower. I also change the grease in the gear box every year. Those small allen screws need some heat to break the Locktite loose to remove them. As with most machinery, they need love ❤ and attention and they will reward you with a long life of service.
