Futaba S3171SB & S3172SV Replacement Gear Pack for Servos - FUEBS3387  [FUEBS3387]

FUTABA S3171SB S3172SV SERVO GEAR SET AS4177 EBS3387
Price:
£18.48
Brand:
Futaba
Model:
FUEBS3387
GTIN:
4513886305443
Condition:
Brand New
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Summary: replacing gears in Futaba S3171/S3172 servos

The Futaba FUEBS3387 gear set is a replacement pack intended for servos marked S3171SB and S3172SV. It supplies the internal gear train parts required when original gears suffer wear that causes increased backlash, noise, or loss of precise centring.

This summary covers compatibility, basic fitment guidance, and how a correct gear set supports dependable servo response during routine service. It is not a substitute for official service manuals but points out practical checks to confirm correct functioning after replacement.

Compatibility reminder: the title lists Futaba S3171SB and S3172SV as compatible; always verify chassis markings and part codes on your servo prior to replacing internal gears. Inspect splines, output shafts, and the case interior for signs of wear or contamination before reassembly.

Specifications

  • Item Servo gear set
  • Material Manufacturer did not specify
  • Model Number FUEBS3387
  • Compatibility Futaba S3171SB, Futaba S3172SV

Using the appropriate Futaba FUEBS3387 replacement gears restores smooth gear engagement and helps maintain reliable centring and response in RC servos, making it a sensible choice for preventative maintenance.

How strict is the fitment between S3171SB and S3172SV models?

The kit lists both S3171SB and S3172SV as compatible. Check the servo's printed model code to ensure it matches one of these two designations before ordering, since internal layouts can differ between variants.

Will these gears fit if my servo has aftermarket modifications?

If your servo has modified splines, reinforced shafts, or altered housings, fitment may be affected. Inspect modifications and compare to stock parts before committing to a standard replacement pack.

What should I do if the new gears do not mesh correctly?

Re-check spline alignment, confirm gear orientation, and ensure no debris is present. If the mismatch persists, halt use and inspect shafts and bearings for wear that could prevent proper mesh.

Is it safe to reuse old screws and seals when fitting this pack?

Reusing serviceable screws is acceptable, but replace any damaged fasteners or seals. Ensure screws are torqued correctly to avoid case distortion that can lead to gear misalignment.

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