EXERCISES, LESSON 3
INSTRUCTIONS: Answer the following exercises by circling the lettered response that
best answers the question.
After you have answered all of the exercises, turn to "Solutions to Exercises" at
the end of the lesson and check your answers. For each exercise answered incorrectly,
reread the lesson material referenced after the solution.
Which of the following procedures applies to removing and replacing a faulty
manual control switch?
a. Keep the external power source connected so you can test the switch as you
make each connection.
b. Pull the wiring harness completely away from the chair in order reach the
Disconnect and connect replacement switch assembly socket terminals one at
a time rather than disconnecting all at once and then replacing.
d. Replace the wiring harness as well whenever replacing the switch bezel.
Which of the following procedures applies to removing and replacing a faulty base
motor when the chair is in the "UP" position?
a. Place a block of wood between the pantograph arms on one side and lower
the pantograph slightly to grip the block of wood securely.
b. After you have reconnected all of the electrical leads in the junction box and
reconnected the power source, run the motor clockwise until it stops to
correspond with the raised condition of the lift.
Leave at least one inch of space remaining between the parallel pantograph
arms when the motor stops at the low lift position because the lift must not
over travel when the pantograph arms close up under power.
d. Once the lift is at the lower extreme position, adjust the height of the lift.
Loosen the locknut on the adjusting screw and turn clockwise to lower the
lower limit of the lift.