XRB SR Compatible Main Gear Upper - Hirobo HI0301043  [HI0301043]

HIROBO 0301-043 XRB SR MAIN GEAR UPPER #0301043
Price:
NZD$24.75
Brand:
Hirobo
Model:
HI0301043
GTIN:
4512895140489
Condition:
Brand New
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Replacement Upper Main Gear for XRB SR

The Hirobo HI0301043 main gear upper is intended as an RC-scale spare for XRB SR helicopter platforms. It replaces the top segment of the main transmission gear set to recover correct drivetrain function when the original part shows wear.

Fitment advice: check the gear on the main shaft for correct seating, inspect axial and radial alignment before final clamping, and confirm gear tooth engagement with mating components. Replace any worn bearings you discover while disassembling the unit.

Role in setup and maintenance: swapping in a fresh upper main gear corrects poor mesh that can cause vibration and drivetrain noise, so include this part as part of scheduled inspections on XRB SR helicopters.

How do I confirm fit before I buy?

Compare the HI0301043 geometry with the component you remove and check part numbers in your XRB SR manual. Visual confirmation on the bench will avoid fitment surprises.

Is any installation hardware supplied with the gear?

No. The item is the upper gear alone. Use existing fasteners or order replacement screws and bearings separately as needed.

What tools and checks are recommended when fitting?

Use proper shaft supports to check runout, set gear engagement with feeler methods or shims, and re-check bearing play. Finish with a slow rotation test to ensure smooth operation.

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