Mark, thanks for your response. I did get it that no one was suggesting that simple deflection is the only possible cause of the dip near the trunnion. However, this idea did get most of the coverage with the possibility of a??localised dip being largely ignored. Even in my case, I wouldn¡¯t swear that it¡¯s not deflection caused by the weight of the trunnion.
The problem I have is it if my machine does have a localised dip, then I can safely jack the top up to remove the deflection component, but any further jacking, which attempts to remove the dip does impose additional load on the cast-iron top.
