Figure 3-7. Wood block installation.
g. Disconnect the back motor from the chair junction box.
h. Remove the "C" rings and the pivot pins that hold the screw tube in the back
i. Remove the set screws and the trunnion pins securing the back motor to the
back motor bracket and remove the motor.
If you are replacing the back motor bracket, continue with steps j. through m.
If you are not replacing the back motor bracket, go to step n. to replace the
back motor. Refer to figure 3-8.
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.