(3) Lean the back section down on a protective mat or cloth to prevent
marring the finish of the back or seat assemblies.
(4) Loosen the two set screws located underneath the seat and below the
back link pivot pins.
(5)
Drive out the pivot pins using a brass or soft metal drift punch.
(6)
Lift off the back section.
(7)
Reinstall in the reverse order.
e. Replace the Lift Assembly. To replace the lift assembly, perform the
following procedures:
(1)
Raise the back section to the straight up position.
(2) Drive out the dowel pin which secures each gear rack to its back link
assembly (figure 1-6, part 39).
(3) Support the back lift assembly firmly while removing the four capscrews
(Figure 1-6, part 36) at the gear box housing end and the two longer capscrews (figure
1-6, part 6) at the opposite end.
(4)
Carefully lift the assembly from the back section.
(5)
Reinstall in the reverse order.
f. Replace the Lateral and Drive Screw Assemblies. To replace the lateral
and drive screw assemblies, perform the following procedures:
(1) Remove the four hex nuts and capscrews that secure the support block
of the drive assembly to the support plate of the seat section. These screws go through
part 24 in figure 1-7.
(2) Loosen the two clamp screws and, while supporting the drive assembly,
pry out the two adjusting pins. Refer to figure 1-8.
(3)
Lift the drive assembly from the seat section and trunnion.
(4)
Reinstall in the reverse order.
MD0370
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