Ford F-650 Owner's Manual page 77

Air-Ride seat (if equipped)
1. Chugger option: Dampens road vibrations and allows the seat to
move with the driver when unlocked.
To unlock, sit in the seat and slide the tab away from the seat (to the
right)
To lock, sit in the seat and slide the tab toward the seat (to the left).
2. Seat adjuster: Lift up to move the seat forward or backward. Release
the bar to lock the seat in position.
3. Seat height adjuster: Pull the control up to raise the seat, push it
down to lower the seat.
WARNING: To reduce the risk of excess slack in the belt
system, always adjust the seat height before fastening the seat
belt.
4. Power lumbar: Press the top of the forward control to inflate the
lower lumbar support; press the bottom of the forward control to deflate
the lower lumbar support.
Press the top of the rear control to inflate the upper lumbar support;
press the bottom of the rear control to deflate the upper lumbar support.
5. Recline: Lift the handle to adjust the angle of the seatback.
2012 F-650/750 (f67)
Supplement, 2nd Printing
USA (fus)
Seating and Safety Restraints
77