Replacement Gear Set for Futaba BLS174HV and BLS174SV - FUEBS3411  [FUEBS3411]

FUTABA BLS174HV BLS174SV SERVO GEAR SET AS4189 EBS3411
Price:
£7.60
Brand:
Futaba
Model:
FUEBS3411
GTIN:
4513886306334
Condition:
Brand New
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Notes on Replacing Gears in Futaba BLS174 Servos

This gear set is intended as an RC model replacement for Futaba BLS174HV and BLS174SV servos, referenced by part number FUEBS3411 and associated with AS4189 and EBS3411. It replaces internal gears to remedy wear-related issues rather than change servo output characteristics.

The guidance here emphasizes correct disassembly and reassembly practices. When changing gears, pay attention to case orientation, preserve bearing and spacer positions, and ensure gear alignment to prevent binding or premature wear.

Before final installation, check for endplay and backlash, confirm spline engagement with the servo horn, and recalibrate endpoints if needed. This component is supplied as a model-grade repair item for hobby RC servos.

How should I orient the case and gears during assembly?

Keep the same case orientation used at disassembly, replace gears in the original sequence, and make sure spacers and bearings sit in their original locations to preserve gear spacing.

How can I confirm the new gears fit correctly before use?

With the case loosely assembled check that gears rotate freely, that there is minimal backlash, and that spline engagement with the horn is correct; only then tighten and perform a functional test.

Should I double-check part references prior to ordering?

Yes. Confirm the servo model BLS174HV or BLS174SV and cross-check AS4189 or EBS3411 part numbers to ensure FUEBS3411 is the correct replacement set.

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