Onewheel GT Battery & BMS Replacement

Written By: Justin Velasquez

Difficulty: Moderate

Steps: 17 – 18

Time Required: 1 – 1½ hours

Introduction

If you’re not getting the range you once did from your Onewheel GT and a 72 hour balance charge hasn’t made things any better, use this guide to help you swap your battery and regain your freedom!

For your safety, power off your Onewheel GT prior to disassembly. This reduces the risk of electrical malfunctions and/or damage during the replacement process.

IMPORTANT: Replacing the battery or BMS of the Onewheel GT will require calibration in order to clear the resulting ‘Corrupted memory’ error.

Note: Altering, damaging, or tampering with any component of your Onewheel GT during disassembly/reassembly may render your existing warranty void or lead to refusal of non-warranty service at the discretion of Future Motion, Inc. (the creators of Onewheel).

Step 1   Remove the fender/delete screws and fender/delete

  • Remove all four (4) screws using a TP25 bit.
  • Note: Keep screws organized as they are easy to mix up and/or lose.
  • To remove the fender/delete, apply pressure to each side of it, near the axle carriers, and pull it up and away from the Onewheel™.

Step 2   Remove the bottom bumper screws and bumpers

  • Remove all ten (10) screws using a TP25 bit.
  • To remove the front bumper, pull it toward the nose of the Onewheel™.

Step 3   Remove the bottom footpad screws

  • Remove all four (4) screws using a TP25 bit.

Step 4   Remove the top footpad screws and footpads

  • Remove all four (4) screws using a TP25 bit.
  • Caution: For the front footpad sensor connector, turn (counter-clockwise) only the smaller part of the connector closest to the controller. Turning the entire body of the connector can damage it or your controller.
  • Note: If you are unable to remove the footpad sensor connector using your fingers, you may use a Future Motion™ footpad connector wrench or a pair of long nose pliers (be gentle).

Step 5   Remove the left-side hub bolts

  • Remove the two (2) bolts using a TP45 bit.
  • Caution: Be sure to use the appropriate bit as these bolts are prone to stripping.

Step 6   Remove the left-side cable retainer screws and cable retainer

  • Remove the two (2) screws using a TP25 bit.

Step 7   Remove the left-side battery/controller module retaining screws

  • Remove all four (4) screws using a TP25 bit.

Step 8   Remove the left-side rail and axle carrier

  • Caution: Be extremely careful not to damage the wiring harness as you remove the rail and axle carrier. The wiring harness can be gently manipulated in order to allow removal.

Step 9   Remove the right-side battery/controller module retaining screws

  • Remove all four (4) screws using a TP25 bit.
  • Caution: Be careful not to let the battery/controller assembly fall as you remove the last screw.

Step 10   Remove the battery/controller assembly

  • Caution: Be extremely careful not to bend or damage the wiring harness while handling the battery/controller assembly.

Step 11   Remove the controller cover screws and controller cover

  • Remove all eight (8) screws using a TS20 bit.
  • Caution: Be extremely careful not to damage the controller gasket while removing the controller cover.

Step 12   Disconnect the controller XT60 and data connectors

  • Remove the XT60 connector first.
  • Remove the data connector by pinching the tab and gently pulling upward.
  • Caution: It is extremely important that the connectors be disconnected in this order to avoid causing damage to your Onewheel™ controller.

Step 13   Remove the battery enclosure screws and battery enclosure lid

  • Remove all eight (8) screws using a TS20 bit.
  • Caution: Be extremely careful not to damage the battery enclosure gasket while removing the battery enclosure lid.

Step 14   Remove the BMS cover

  • Remove the two (2) screws using a T8 bit.

Step 15   Disconnect the battery balance connector

  • Remove the connector by pinching the tab and gently pulling upward.
  • Caution: It is extremely important that the battery be disconnected in this order to avoid causing damage to your Onewheel™ Battery or BMS.

Step 16   Disconnect the battery XT60 connector

  • Note: Remove only the XT60 connector on the left side of the BMS (the one attached to the battery).

** If you need to remove your Battery, proceed to Step 17 (Battery). **

** If you need to remove your BMS, proceed to Step 17 (BMS). **

Step 17 (Battery)   Remove the battery

  • Remove the battery by gently lifting up on the side closest to the connectors.
  • Caution: DO NOT use sharp tools to pry the battery from the enclosure as a puncture can present a fire or explosion hazard.

Step 17 (BMS)   Disconnect the wiring harness XT60, data, and charge port connectors

  • Note: The wiring harness XT60, data connector, and charge port connector can be removed in any order.
  • Caution: When removing the connectors, be extremely careful not to hit/damage the surface-mounted components nearby.

Step 18 (BMS)   Remove the BMS

  • Remove the BMS by gently lifting up on it.
  • Caution: The BMS is sensitive to static electricity and should be handled with extreme care. If you need to store it, an anti-static bag is highly recommended.

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