Front Bearing Replacement
From Unofficial Zero Manual
This replaces the front wheel bearings on Gen2 models.
- Tools
- 6mm Allen Wrench - Axle (M17)
- 5mm Allen Wrench - Pinch
- 13mm Socket - Brakes
- Bearing Press Tool/Kit
- Steps
- Remove the Front Wheel
- Remove the spacers, then the dust seals, from each side and clean.
- Press the bearings out from the opposite side.
- A socket extension works well, alternating around the perimeter.
- Clean the inner wheel.
- Press the new bearings in, aligning with the inner axle tube.
- A large socket works well to press only on the outer bearing.
- Replace the dust seals.
- Return the wheel to the bike.
- Aligning the axle with the spacers, press the axle back into the forks.
- Expand the brake calipers to prepare for remounting.
- Remount brake caliper with the 13mm socket to the correct torque.
- Return the outer spacer and make the axle bolt snug with the 6mm allen wrench.
- Alternate tightening each 5mm pinch bolt.
- Ensure proper wheel movement.
- Tighten left pinch bolts to the correct torque using the 5mm allen wrench.
- Tighten the 6mm Axle bolt to the correct torque.
- Tighten right pinch bolt to correct torque using the 5mm allen wrench.
- Ensure smooth movement.
- Pump the brakes to return to proper action.
- Lower the front wheel.
- Confirm torques.
- Test ride!
- Reconfirm torques.
- Paint the bolt heads to so that any loosening is detectable.