Futaba FUAS3078 Servo Housing Replacement for S135 S3501 S3502 S9601  [FUAS3078]

Housing replacement summary

This Futaba FUAS3078 servo case set is designed as a direct housing replacement for the Futaba S135, S3501, S3502 and S9601 servos, supplied without original packing. The item restores the external shell only and does not include the internal gear train or electronics, so the servo's existing mechanical alignment remains when parts are reinstalled.

Confirm compatibility by matching the exact model number on your servo to the list above. During the transfer, keep the internal gear stack and bearings oriented as removed, watch ribbon and motor lead routing, and take care not to stress soldered connections.

To fit the replacement case, remove the case screws and carefully lift the cover to access gears and motor; move necessary components into the new shell and reassemble with the original fasteners. Use precision screwdrivers and a small hex driver to protect thread integrity.

Using a fresh housing will help retain correct horn positioning and mounting geometry, which supports predictable steering and throttle behaviour after repair.