This Futaba FUAS3091 servo case set is a direct replacement housing intended for use with the S9202, S9304 and S9403 servo models listed in the product name. The text explains fit, installation pointers, and the part's role in routine maintenance and tuning for RC models.
The components are supplied as a case set without original packaging and are designed as like-for-like body replacements for affected servo assemblies. Before attempting installation, verify the servo model code on your unit matches S9202, S9304 or S9403 to ensure compatibility.
Installation tips: power down the radio system and remove the servo from the model before opening the case, keep gear alignment and centering marks visible, and retain any original bearings or shims when transferring internal components. These cases are intended to house existing internal parts rather than alter gear ratios or electronics, so they are for maintenance and repair rather than performance upgrades.
For tuning and maintenance, a replacement case can restore mounting points and horn alignment after impact or wear, improving steering consistency and easing reassembly. Always check servo center and end points after reassembly and run a bench function test before reinstalling into the model.
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