Replacing Rear Wheel Bearings , Mavic XA Elite (ITS4 version)
Replacing the cartridge bearings in a Mavic XA Elite rear hub.
Symptoms
Back wheel has perceptible play and substitute wheel doesn’t show symptom eliminating frame slop.
Time
About an hour
Required special tools
- Chain whip
- Lock ring tool
- C-Clip tool
- 6903 Bearing Puller
- 6903 Bearing Press or suitable tool.
Parts required
2 x 6903 cartridge bearings. These are standard sizes so you can use Mavic part M40076 / LM400760001 or any other manufacturers part. You get what you pay for or in the case of ceramic you'll pay a lot for not much more.
Watch this Video
Step 1 - Remove cassette and rotor.
Use chain whip and lock ring tool to remove the cassette. Remove rotor (T25 driver) to avoid risk of contamination.
Step 2 - Remove plastic dust cap on non-drive side (NDS)
Carefully remove plastic dust cap on non-drive side (NDS) with a small blade screwdriver. There are notches in the cap you can use or lift gently by working a large flat blade screwdriver under the edge. Employ your hands as soon as practical.
Step 3 - Remove C-Clip and washer stack on the NDS
Using the C-Clip pliers ease the C-Clip off and then the washer + spring-clip + flat washer under that.
Step 4 - Push the axle out the drive side
Push the axle out the drive side by hand or with a light tap with a soft mallet, the free hub will come along for the ride so be careful not to lose any of the pawls in the hub body.
Step 5 - Remove the drive side (DS) bearing
Depending on the bearing remover tool that you have, remove the bearing cartridge. Observe cartridge orientation which is seal side in.
The tool I used was a blind bearing puller from https://www.bearingprotools.com . You tighten the expander on the bearing then tap it out using a drift/long bolt from the other side of the hub. It took a surprising amount of hammer force to remove the bearing.
Step 6 - Remove non drive side (NDS) bearing.
Same thing but on the other side. Again observe cartridge orientation. On this side the seal faces out.
Step 7 - Press the new bearings into place.
Clean the hub and then place a smear of grease into the bearing cups to help with insertion.
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| PF30 press repurposed for 6903 install. Old cartridge was used as extender. |
DO NOT attempt to hammer the bearing in by tapping on the inner race of the bearing as this will destroy the bearing permanently. You need to apply the press force to the entire outer surface of the bearing.
Step 8 - Clean the freehub and then reinstall.
Remove the axle from the freehub. The axle comes away from the freehub with hand force or a light soft hammer tap. Clean and degrease the axle, freehub and pawls. The rubber seal can be removed for cleaning.
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| Axle and freehub. Cassette chomping on hub splines is "normal". |
Orient the rubber seal correctly when reassembling after cleaning.
Oil the freehub body by placing a small amount of light oil in the tooth cavity . NEVER USE GREASE HERE!
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| Too much oil. Use less |
Step 10 - Reinstall axle and NDS washers
Push the axle back in then reinstall the washers from step 3 back into the axle. This can be a PITA as the wire spring is designed to tension the system. The process in the Mavic video of hooking the spring over the outer tapered washer is BS as it doesn't work.
Install the flat washer, ramped washer and C-Clip onto the axle first THEN slide the wire spring clip between the flat washer and ramped washer. I used a large flat bladed screwdriver to ease the arms slightly apart. The spring will fall into place as soon as the arms have enough room. When in place the shoulders of the spring should be barely visible.
Once that's done replace the plastic dust cap and reinstall Cassette & rotor.
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