Note: No pulleys are included with the new encoder .
Apply the correct thread-locking compound ("Loctite") to the setscrew.
Install the pulley  on the encoder .
Make sure the pulley  is in the same position on the shaft as on the used encoder.
Install the pulley screw .
Install the encoder  and screws  on the encoder belt tensioner .
Note: Some encoders can have nuts.
Install the encoder tension bracket assembly .
Install the (4) tensioner screws . Tighten the tensioner screws  with your hand.
Make sure the tensioner screws  are sufficiently loose to let you move the encoder tension bracket assembly .
Move the encoder  in the direction of the motor encoder pulley .
Put a new encoder belt  on the encoder pulleys . Use your hand to turn the spindle.
Turn the spindle to align the belt  with the pulleys.