plate and are located on the perimeter of the backing plate these are released from the backing plate face of the column the bed support 1068 can now be removed from the column by use of the handling device as shown in fig1 a and fig1 b the handling device as described in fig6 above 1080 is wheeled into position where the arms 1085 are a few centimeters above the bed support 1068 the bed support 1068 has a number of threaded holes that correspond to the holes used to bolt the bed support to the backing plate 1064 the arms 1085 of the handling device 1080 have holes through which bolts are screwed into the bottom bed support 1068 these holes are aligned to those of the bed support 1068 and bolts affixed to secure the bed support to the arms 1085 once attached the bed support 1068 can be removed from the column by raising the arms 1085 a few centimeters and wheeling the handling device 1080 away from the column 1010 the bed support 1068 can now be cleaned or new o rings replaced as necessary generally the bed support will be moved away from the column as shown in fig1 lowered onto a.