IAI America RCS3PCR-SS8C - Manual (Page 168)

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11. Maintenance and Inspection
148
Motor affixing bolts
Motor affixing bolt
Allen wrench
The projection on the coupling lies
vertical.
The slit faces left.
5) Remove the motor.
Remove the four motor affixing bolts using an Allen wrench of 3 mm across flats.
[Structure of 150-watt type]
6) Align the coupling position on the actuator side.
Fine-adjust the coupling position until the projection on the coupling lies vertical, with the slit facing left.