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

Replacement servo shell details

This Futaba FUAS3078 servo case set is supplied as a direct replacement housing for Futaba servo models S135, S3501, S3502 and S9601, and is provided without original packing. It is intended to restore a damaged or worn outer shell while leaving the internal gear train and electronics in place so the servo's mechanical alignment is preserved on reassembly.

Fit is limited to the model numbers shown, so confirm the marking on your servo before purchasing. When swapping housings, transfer the internal gear stack and bearings exactly as removed, pay attention to ribbon and motor lead routing, and avoid applying stress to soldered joints during the move.

Installation suits hobby-level maintenance: remove the case screws, lift the cover carefully to expose gear and motor assemblies, move required parts into the replacement case, then reassemble using the original fasteners. Use a small hex driver and precision screwdrivers to avoid stripped threads.

Replacing a damaged shell helps maintain proper horn alignment and mounting geometry so steering and throttle responses remain consistent after repair.