My washer is leaking near the bottom of the drum. I'm thinking it is a seal. I removed the front panel and could see the leak. I removed the fabric softener resivoir on the top part of the agitator and the bolt that secures the agitator to the motor shaft. From what I read the agitator should pull straight up to remove. Is there a set screw that also secures it. It moves a little but I cannot remove it. Thanks