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Campagnolo Zonda Hub Servicing

by saladfunky
Sun, Feb 05, 2017 23:01
5

My Zonda bearings are feeling a bit rough and I believe servicing is possible? Can anyones share any wisdom on this with any clues on which tools are needed? Or should I trust a LBS? I do prefer to do it myself and so far have never used a LBS for maintenance.  Thanks in advance. .

Chris

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mrmo | 8 years ago
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http://www.bikeradar.com/forums/viewtopic.php?t=12807001

 

it should give enough detail on fixing the likely issue

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Welsh boy | 8 years ago
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Dead easy to service the bearings but both times mine felt rough it was because the free hub had gone.

I refused to buy a third so changed my wheels instead.

https://www.campagnolo.com/media/files/035_71_Technical%20manual_wheels_...

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mrmo | 8 years ago
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https://www.youtube.com/watch?v=DXtrJB7hHoY

 

that should be enough to get you started, it is the same hub. 

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mrmo | 8 years ago
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they are piss easy to service, There is only one issue, is it the hub bearings or more likely IME the freehub bearings, the later are serviceable but....

I am doing the following from memory so please check!!! So in some sort of order....

First part get the cassette off, i assume you have chain whip etc? 

Second part remove axle, on the non drive side is a small allen key, this is designed to hold the lock ring,  

third part the axle ends are actually bolts, if you look down the axle you should see hex flats, 5mm or 6mm???? Just put a key in both ends and one end will come off. 

Unscrew everything and pull the freehub off, that gives access to the bearings in the centre and outside, there are some cones and some conical thrust washery things that preload the bearings. 

 

Before you start i would suggest wiggling the cassette on the hub, if there is play it is the freehub that is shot not the hub, spin the axle by hand is it smooth??? 

 

If as i suspect it is the freehub, have fun with the circlip inside the freehub, the "non removeable" removable one!!!! (it will come out, but it is a pain) 

 

I am sure if you go on youtube you will find a video that explains this. 

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Nat Jas Moe | 8 years ago
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I beleive these are cup and cone bearings so you should be able to service them fairly easily. A couple of spanners and some Youtube should do the trick. Oh and some degreaser and grease of course. Then just a little patience when putting back together.

 

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