The last time I mowed, I noticed that the deck assembly seemed to be making a rattling/squeaking noise. I started checking for loose nuts, bolts, etc. and found that the pusher assembly (p/n 349803) on my 2005 Super Z (926766) has developed more wear (slack) on the right side of the pusher assembly where it rotates. When you move the deck front to rear on the right side, there is almost twice the movement than that on the left side. Is this normal wear? I could not find any adjustment, other than a grease fitting. Please advise. THANXZZZ!!!