F 550 4WD Super Duty V10-6.8L (2009)
5. Remove the pin-type retainers at the front and back of the cushion side shield.
6. Remove the 2 screws and cushion side shield.
7. Remove the 2 screws and separate the manual lumbar adjuster from the cushion frame.
8. Remove the manual lumbar adjuster.
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Turn the manual lumbar adjuster until the cable is exposed.
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Detach the cable case from the manual lumbar adjuster.
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Slide the cable out and remove the manual lumbar adjuster.
9. Release the rear and inboard side cushion trim cover J-clips to aid routing of the lumbar cable.
10. Remove the 2 recliner-to-cushion frame bolts.
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To install, tighten to 50 Nm (37 lb-ft).
11. NOTICE: Do not damage the plastic pivot bushing when removing the backrest or the backrest may become loose.
NOTE: When installing, route the lumbar cable and heater mat wire behind the seat hinge (if equipped).
Remove the seat backrest.
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Release the backrest pivot bushing.
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Pull the backrest away from the seat hinge.
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Remove the backrest.
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Feed the lumbar cable and backrest heater mat wire through the seat cushion opening (if equipped).
12. To install, reverse the removal procedure.