Service A Freehub Body On A Bike Wheel

Introduction

An freehub body has bearings like a front wheel and the freewheel screws onto the hub shell. You need to remove the freewheel to service the hub bearing.

Step 1

Access the freehub body - Service A Freehub Body On A Bike Wheel

Access the freehub body

Take the wheel off the bike.

Step 2

Dismantle The Left Side - Service A Freehub Body On A Bike Wheel

Dismantle The Left Side

Hold the cone on the left side still with a cone-spanner and loosen the lock-nut. Unscrew and take off the lock-nut, washer and cone. Catch the balls if they fall out. Count them.

Step 3

Remove The Axle - Service A Freehub Body On A Bike Wheel

Remove The Axle

Separate the axle from the other side of the hub and shake – or pick – out the remaining balls.

Step 4

Clean - Service A Freehub Body On A Bike Wheel

Clean

Clean all the loose parts and the cups inside the hub. The cup on the drive side is part of the freehub body but you can treat it like the cup in a hub shell

Step 5

Inspect The Bearing Surfaces - Service A Freehub Body On A Bike Wheel

Inspect The Bearing Surfaces

Check the surfaces – on the cones and inside the freehub body shell – where the balls run, for roughness or uneven wear. Worn cones can be replaced but if a hub is worn it may need to be scrapped.

Step 6

New Cones - Service A Freehub Body On A Bike Wheel

New Cones

If you need to replace the cones on the freehub body, measure the position of the one still on the axle, and make sure they go back in the same place so the axle is centred in the hub. The drive side may have more spacers between the lock-nut and cone. If you’re replacing the cones you may need different sized spacers if the new cones are shorter or longer than the old ones. It may be easier to replace the whole axle if you can’t find cones that match the thread on the old axle.

Step 7

Repack With New Balls - Service A Freehub Body On A Bike Wheel

Repack With New Balls

Pack the races in the hub with new grease and press the same number of new balls – of exactly the same size – into the grease. Changing the balls prolongs the life of the other parts of the freehub body. If you’re not sure how many balls came out, or if you suspect that the hub was packed with the wrong number of balls, fill a race with balls and then take one out. The balls need room to roll around.

Step 8

Rebuild - Service A Freehub Body On A Bike Wheel

Rebuild

Check the lock-nut and cone assembly on the right side of the axle are locked tight. They won’t be accessible when they are inside the hub.

Step 9

 - Service A Freehub Body On A Bike Wheel

Feed the axle into the hub taking care not to disturb the balls.

Step 10

 - Service A Freehub Body On A Bike Wheel

Assemble the other side and adjust the hub.

Step 11

 - Service A Freehub Body On A Bike Wheel

Remount the wheel in the bike.