S9602 Replacement Internal Gear Pack FUAS3215 for Futaba  [FUAS3215]

Futaba S9602 internal gear replacement

This aftermarket gear set is identified by Futaba model FUAS3215 with labels AS3215 EBS3226, intended for S9602 servos. It serves as a replacement for damaged or fatigued internal gears, restoring proper tooth engagement and reducing gear lash when installed with correct mesh.

Compatibility: the set is designated for S9602 servos in the product description; always confirm spline count and casing fit before attempting installation. Replacement requires careful disassembly of the servo, precise alignment of the gears, and correct reassembly to preserve mesh and horn centring.

Role in tuning: upgrading to metal internals increases gear durability and rigidity, which can alter control feedback and improve resistance to stripping during high loads. After fitting new gears, verify pinion alignment and run the servo unloaded through its travel to ensure there is no binding.

Apply this gear set when renewing worn internals in S9602 servos, use appropriate lubrication, and bench-test the servo motion before reinstalling into the model.