d. Remove the four number ten screws securing the bellows top cover to the bellows
hanger and let the bellows fall free.
e. Remove and retain the four bolts, nuts, and washers securing the chair to the
lift and remove the chair from the lift.
f. Place the chair on its side on a carpet or other protective covering so that it
will not get scratched or damaged.
g. Set the potentiometer dials at "9" and loosen the set screws in each knob.
Remove the knobs/dials and the 3/8 inch hex nuts on the potentiometer shafts.
h. Remove the screws from the back cover and remove the cover.
Remove the plastic toe cover, motor cover, and toe board cover.
j. Disconnect the potentiometer wiring harness from the automatic switch.
It may be necessary to loosen or remove the top screws securing the back
support in order to gain access to the connections of the wiring harness and
k. Disconnect the potentiometer wiring harness from the solid state control
board by depressing the locking arms of the connector, using the thumb and forefinger,
and pulling outward.
l. Remove the screws and clamps securing the potentiometer wiring harness to
the chair, and remove the harness.
m. Install the new wiring harness connector to the control board by pushing down
until the locking arms of the connector catch.
n. Install the new potentiometer wiring harness onto the frame of the chair using
the clamps and screws you removed in step l. above.
o. Connect the wiring harness to the automatic switch.
p. Replace the potentiometers in the back cover and secure with the 3/8 inch
hex nuts you removed in step g. above.
q. Replace the back cover.
r. Install the potentiometer dials in the "9" position and tighten the set screws in