lol i had a friend who tried fixing his own forklift brakes (old hyster)
the cones stumped him for 5 hours before he called me

i got the wheels off in 10 minutes
he promptly cursed me out lol

i tap (not beat) my screwdriver into the seam of the cone after theyre a lil loose
that spreads em enough to get them off easily plus they usually clamp onto the screwdriver and you can pull them right off

i keep a threadchaser or die handy to fix any "misses" lol