Marine Engineering

If the base plate has jackbolts installed, the task of moving the machine is made much easier. In many situations, it is best to have jack screws installed at the time of the alignment rather than trying to move the machine some other way, which is often more difficult and requires more time. Before any of the hold-down bolts are loosened, all of the jackbolts must be loosened on the machine. Any unequal pressure of the jackbolts could result in an uncontrolled move and require the technician to take another set of alignment readings.  When loosening the hold-down bolts, back them off just enough to allow the machine to slide sideways. Since it takes very little pressure on the jackbolt to move the machine horizontally, there is no real need to completely back off or remove the hold-down fasteners.  If a graph is constructed determining the position of the misaligned shaft, you will know exactly which direction to move the machine. Another way to avoid confusion is to alwa...