Servicing X Axis

[jgarner]

My x axis is loose on my HD510. I can twist the carriage right and left and I see the bearing mounting block is loose. I need to tighten the X axis bearings on the rails, but can't see how to get to the mounting blocks to tighten. I have the carriage removed from the gantry, but just don't see how to get to the bearing to tighten them to the carriage. Any recommendations would be greatly appreciated.