j. Remove the round head screw connecting the back link to the crank.
k. Loosen the set screw and remove the crank pin.
l. Using a 3/8 inch wrench, remove the hex nut and washer from the back motor
bracket. Do not remove the socket head cap screw.
m. Remove the two hex washer head screws from the bracket and lower the
bracket out of the chair frame.
n. Attach the back motor bracket to the motor assembly with the trunnion pins
removed in step i. Tighten the set screws.
o. Install the crank with the crank pin removed in step k. Tighten the set screws.
p. Secure the motor and the bracket assembly to the chair casting with the two
hex washer head screws removed in step m. Install the nut and the lock washer
removed in step l.
Place a drop of Locktite on the screws and nuts.
q. Attach the back link to the bracket crank with the round head shoulder screw
removed in step j.
r. Connect the back motor to the chair junction box.
s. Lift the chair and remove the wood block. Replace the seat motor pivot pins
and the set screws removed in step e.
t. Install the retainer bracket onto the back motor bracket.
u. Replace the motor skirt and secure the bellows cover to the bellows hangers
with the screws removed in step d.
v. Connect the chair to the power supply.
w. Ensure that the chair operates properly.
The screw tube is factory set with a distance of 3/16 inch minimum plus 1/4
turn between the screw tube and gear housing. This is set with the motor in
the DOWN position. Check the dimensions to see that they are correct.