This JR Propo JRSG8101 gear set is supplied as a direct internal replacement for the JR Propo servo models listed below. It contains the spare gear components intended to be swapped in when worn or damaged teeth reduce steering accuracy or control responsiveness. The pack is offered as a parts kit for scale RC servos and is meant for hobby maintenance use only.
Compatibility: made for direct use with model numbers 811, 8101, 8201, 8300, 8301, 8401. Do not assume these parts fit other servos; confirm the internal gear layout and dimensions against the service manual before fitting.
Installation notes: open the servo case and document gear order plus any washers or spacers before removing components. Replace the worn gear items and then verify gear mesh and free rotation by hand prior to reconnecting power. Once reassembled, run a low input test to confirm smooth, binding-free motion.
Tuning and service role: renewing the internal gears reduces backlash and restores predictable end-play, helping to recover steering precision and consistent control feel. Use this set whenever grinding or excessive slop is noticed during normal operation.
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