Futaba S3114/S3154 Replacement Servo Case Set - FUBS3321  [FUBS3321]

Replacement shell set for S3114 and S3154

This Futaba FUBS3321 servo case set is a direct accessory for Futaba S3114 and S3154 RC servos. It supplies replacement external housings to restore a worn case or refresh the servo body while leaving the internal electronics unchanged. The description focuses on fit accuracy, straightforward installation steps, and how the shells support setup and tuning work.

Mechanical installation requires removing the servo horn and screws, transferring internal components into the replacement shells, and reassembling carefully to maintain correct gear mesh and bearing alignment. Keep fasteners and small parts organized during disassembly and do not force bearings or gear stacks to avoid damaging internal components.

For chassis setup and tuning, matching replacement shells help preserve mounting points and alignment when swapping servos, reducing the need to rework linkages or brackets during routine maintenance or trackside changes.