IAI America RCA2-TW4N - Manual (Page 119)

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13. Maintenance and Inspection
[11] Turn the dedicated replacement jig (large) and the replacement jig (small) by the same amount.
When the coupling fastening screws appear through the tool holes, tighten them with a 2 mm hex
wrench. (There are two fastening screws.)
[12] Align the marks made in [9]. After the marks are aligned, remove the dedicated replacement jig
(large) and the dedicated replacement jig (small).
[13] Apply the specified grease (TL101Y grease made by NOK) to the coupling spacer (front and rear),
then install the coupling spacer on the actuator side.
[14] Install the replacement motor unit on the actuator side, then tighten the fastening screws with a 2 mm
hex wrench.
(The actuator side groove and replacement motor unit protrusion should have been aligned in [12],
but if not, align them here.)
Rotate same amount to keep aligned Tighten with hex wrench
Tighten with hex wrench