IAI America RCA2-SA6R - Manual (Page 83)

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13. Maintenance Inspection
[3] Remove the belt from the pulleys. When replacing the belt, proceed to step [7].
[4] Remove the tension adjustment bolts and pull out the motor unit.
[5] Install the replacement motor unit.
As shown below, install the motor unit by making sure its specified surface faces the actuator base.
Loosely secure the motor unit using the tension adjustment bolts.
Install the motor unit by making sure the
base surface of the actuator faces the motor
unit surface with two holes.
The surface with no gaps should face the
motor unit surface with two holes.