d. Remove the four screws and nuts securing the chair to the lift.
e. Lift the chair free and place it on its side on the floor.
f. Disconnect the seat motor power cord.
g. Loosen the two set screws securing the pivot pins in the screw tube and
remove the pivot pins.
h. Loosen the set screws securing the pivot pins in the seat motor gear housing
and pry the pivot pins free.
Lift the seat motor from the casting.
j. Connect the following components as indicated below.
The new seat motor plug to the proper connector from the junction box.
The chair power cord to the lift.
The lift to the external power source.
k. Depress the seat control switch and operate the motor to the TOE DOWN
Let the screw tube turn free. The screw tube will rotate counterclockwise as
the motor runs toward the TOE DOWN position. The seat motor assembly
has been factory set at the TOE DOWN position.
l. Disconnect the chair power cord and the external power cord.
m. Secure the seat motor gear housing to the cradle casting with the pivot pin
and set screws you removed in step h. above, taking care not to rotate screw tube more
than 1/2 turn.
The pivot pins must be driven into the housing.
n. Secure the screw tube with the pivot pins and set screws you removed in step
o. Install the chair to lift using the screws and nuts you removed in step d.
p. Connect all the power cords.
q. Operate the controls to check the new seat motor.