moffat washing machine?

my moffat washer recently stopped agitating when it was on the wash cycle, but still spins when it rings out clothes. taking advice of several others i checked to make sure belt was ok. belt was fine and transmission looks fine also, but upon turning belt i noticed agitator isnt locked into place it just spins freely or stays stationary. but i cant seem to get the top section off of agitator so i can see if there is a mechanism under agitator that might be brocken because when i do spin it by hand it wobbles and feels very loose.