(6)
Reinstall in the reverse order.
NOTE:
Ensure the retaining ring (figure 1-9, part 11) is firmly in the retaining ring slot
to prevent the worm gear from slipping (figure 1-9, part 12). If the retaining
ring is not in place, the worm gear will slip out of place allowing the entire
column to drop during raising or lowering.
NOTE:
Some units have been modified by the manufacturer using a sheer pin in
place of the retaining ring. Consult your shop modification work orders for the
pin type and placement.
i. Replace the Column Assembly. To replace the column assembly (figure 1-
12), perform the following procedures:
(1)
Remove the head and leg sections.
(2) With two or three assistants steadying the assembled back and seat
sections, remove the four capscrews which secure the drive screw bracket to the top of
the column (figure 1-9, part 29).
(3)
Remove the entire assembly, as a unit, from the column.
(4)
Remove the vertical gear box.
(5) Remove the six capscrews (figure 1-8, part 17) which secure the
mounting flange to the top of the base assembly (figure 1-8, part 18).
(6)
Lift out the column assembly.
(7)
Reinstall in the reverse order.
MD0370
1-12
Previous Page
