IAI America RCP4W - Manual (Page 73)

4. Maintenance Inspection
67
8) Rotate the coupling on the replacement motor unit to adjust the position of the protrusion on it so it
fits to the recessed slit.
9) Attach the motor and tighten the four screws to hold the motor (at circled places) with a hex wrench.
Recessed
slit
Coupling protrusion
on replacement
motor unit
Tightening Torque : 207N•cm
Tool to use: Hex wrench 3mm-sized