The Futaba FUAS4153 gear set is presented as a direct service replacement and appears under the listing FUTABA BLS155 BLS352 BLS452 SERVO GEAR SET AS4153 EBS3355. It is intended for use inside hobby servos to restore internal gear function when original components become worn.
The description concentrates on compatibility and maintenance use rather than performance claims: it is specified for the BLS155, BLS352 and BLS452 servo models and aimed at hobbyists performing repairs on model cars, boats and other RC craft.
Practical fitting advice: when replacing gears keep alignment and bearing seating precise, verify spline engagement on the servo output shaft, and confirm correct mesh and free movement before final installation. No special tools or modifications are indicated in the source material.
As a service part, this gear set helps renew internal gearing on the listed Futaba servos and is suitable for routine hobby maintenance and tuning jobs that require replacing worn gears.
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