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Message: <blockquote data-quote="Channel Hopper" data-source="post: 741501" data-attributes="member: 175144">The jack could have been installed the other way round to prevent water running down the driveshaft.The problem with leaving the bolts slightly undone is not the wear on the surfaces as such, afterall many gearboxes rely on nothing more than shims running up against the cogs. The problem starts with the difference in diameter of the bolt and the hole it runs through, which across the polarmount can mean a twisting movement of the dish, enlarging the hole over time. The wear will be a quarter or so of what it is on a 3.7m dish though.</blockquote>