Futaba FUAS4139 Servo Case Set for S3153-size servos  [FUAS4139]

Servo case set overview

This Futaba FUAS4139 servo case set is an RC-scale accessory intended to house S3153-size servos during installation or maintenance. The set is supplied without retail packing and is presented as a replacement or service part to secure the servo body inside hobby models.

Compatibility centers on S3153-dimension servos and other servos that match the same external form factor. The case functions as a mechanical housing to maintain alignment with mounting points and to keep the servo fixed during setup and tuning. It does not include internal electronics or servo units.

Installation notes: fit the servo into the case so that the spline and output shaft remain unobstructed, verify clearance for horn and linkages, and use the model's existing mounting screws and spacers when reattaching to the chassis or frame. The case aids repeatable positioning when swapping servos during bench testing or track-side repairs.