The Futaba FUAS3090 servo case set (AS3090 / EBS3094) is supplied without retail packing and is intended as a replacement outer shell for S9102-series hobby servos. It restores a damaged enclosure or provides a fresh housing for older units.
Move the electronics and gear train from the worn shell into this replacement case to regain secure mounting and correct shaft alignment. This is a model-level accessory for radio-control applications; it is not for full-size vehicle use. Confirm the S9102 model code on your servo to ensure compatibility.
Procedure summary: extract the servo from the model, open the existing housing, lift the PCB and gears as a unit where possible, locate them in the new case, and tighten the original fasteners. After reassembly, fit the output horn and briefly energize the servo at low throttle to ensure the neutral position is correct before reinstalling in the model.
Usage tips: the case supports field repairs, can correct broken mounting lugs, and helps maintain consistent servo installation during setup and tuning of RC cars, boats, and aircraft at a hobby scale.
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