i am having problems with my washer not agitating. it will fill up with water, spin, and drain. when it is suppose to agitate i can see the thing in the middle of the washer tub ever so slightly moving back and forth. i do not have the owners manual. kenmore 70 series heavy duty plus. model#82372110 about 10 yrs old. i pulled the center cap off and tried to remove the only bolt showing but i turn it and the whole center moves with it. i can see a small orange looking gear that moves quite freely. maybe this is the problem? not sure, but still can not remove bolt to see. PLEASE HELP CLOTHES ARE PILING UP!!!