Sears 721.24195S Field Manual page 12

5) VIBRATION NOISES
6) RADIO, TV RECEPTION DISTURBANCE
7) IMPROPER TUBE OR NOZZLE CONNECTION
Loose parts
Unbalanced motor assembly
Foreign matters are attached
to the impeller
Poor carbon brush rectification
Armature is cut or foreign
matters attached
Poor cord, lead wire
Poor carbon brush rectified
Poor electric connector
or receiver
Poor capacitor
Bent connection parts
Poor connection
(Caused by foreign matters)
11
MODEL 721.24195S
Secure firmly
Exchange or repair the motor
Remove the foreign matters
Exchange the carbon brush
or the motor
Exchange motor
Remove foreign matters
Exchange cord, lead wire
Exchange the carbon brush
or the motor
Repair the electric connector
or receiver
Exchange the capacitor
Exchange the parts
Remove the foreign matters
and reconnect