I have a nice Kiev 4 (the one with the meter, late model), which has an annoying problem, though - the focusing sticks a bit on the extreme position - i.e. on extreme close and extreme far distances. When focusing closer than 1,15 meters or further than 10 meters, the geared "teeth" begin to feel - i.e. instead of smooth movement without any resistance, the wheel (or the lens, it's the same whichever way I focus) starts to "grind", and I can feel each individual "tooth" as I turn the wheel, and turning it becomes progressively more difficult the last few degrees...
I've opened my other Kiev (model 4A), and know how to do that (i.e. remove front plate).
However, I haven't opened this one. Is the procedure of removing the front plate the same (7 screws, one hidden beneath leatherette on the side of the lens)? What should I check for this "sticky focus" problem? Lens mount or just the focusing wheel gear meshing?
The problem appears with all lenses: I know that other lenses besides its Jupiter 8 or Helios 103 will focus with more resistance (as is indeed the case with my Jupiter 12). So, it's not the problem of non-"normal" (50mm) lens. The problem manifests itself even with no lens mounted...
Any suggestions? It's a nice camera, meter is working and accurate, and in fact it looks almost brand new - and also produces nice photos

It's just that this problem irritates me a bit, and being "screwdriver-happy", my fingers itch to open this beast
Attached is a photo of my Kiev 4...
Denis