Where do I buy a "Lock Nut Unit" for a Shimano WH-R550 hub?

[Manonabike]

I started servicing the hubs on a Shimano R550 set of wheels - first service in 2000 since new and I found that one cone of the front wheel has some damage and also one on the rear wheel.

The part number for the front is Y-4D4 98020 which includes the cone I'm after.

Now, is there a generic part or it's a case of having to purchase the genuine Shimano part? Halfrouds do several axles with cones included but they don look like the one I'm after

How often should I service hubs? For sure, I wont let it go to 2000 miles

 

[subaqua]

http://www.sjscycles.co.uk/shimano-hub-cones-and-seals-dept422/

 

[Wildduck]

sometimes it cheaper to buy the whole hub than just the spares and take out what you need

 

[Manonabike]

Thanks for the link, that is handy.

Yes, buying the whole hub might not be a bad idea but in my case, I would need to buy the front and rear hubs now

Today I serviced a set of wheels I have for many many years, they have gone from bike to bike and they are currently being used in my SS. Never been serviced before so I expected there would be some damage...... nothing, perfectly healthy hubs.... I'm guessing that hubs, 25 years ago, were made more robust that now.

 

[Manonabike]

Any more places to buy hub spares?

Two cones show sings of pitting and I understand that one should replace any damaged parts, having said that, what would be the risk of using the cones while I find replacements? My concern would be to damage the main body of the hub, where the bearings make contact.

Thanks in advanced

 

[Tim Hall]

I don't think you'll do any damage short term. After all, how long have you been riding the bike with the hubs in the damaged state already? You'll find it harder/impossible to set the bearing up properly with pitted cones, as the ball bearing won't be running on a level track.

As I understand it, the bearing cups aren't generally replaceable in Shimano hubs. Certainly that's been my experience.

On the other hand, also in my experience, I've only seen pitting of the cones and not to the cup.

 

[Manonabike]

I don't think you'll do any damage short term. After all, how long have you been riding the bike with the hubs in the damaged state already? You'll find it harder/impossible to set the bearing up properly with pitted cones, as the ball bearing won't be running on a level track.

As I understand it, the bearing cups aren't generally replaceable in Shimano hubs. Certainly that's been my experience.

On the other hand, also in my experience, I've only seen pitting of the cones and not to the cup.

How long? No idea, I serviced them after 2000 miles for the first time, just to find I had waited too long.

It's such an easy job that I'm now planning to do it next time I complete 500 miles since the service, unless I find the cones first, in which case I'll replace them and continue with my 500 miles gap between services.

Cheers for the comments

 

[Malaconotus]

Ask local bike shop to order Y-4D4 98020. The point of these techdocs and part numbers is that spares can be ordered from Madison, the Shimano distributor in the UK. It often isn't quick, but they always turn up eventually IME.

 

[Manonabike]

Thanks for the info.

Fortunately my good friend google helped to find a source so I will be ordering the parts now.

 

[Graham1426]

Please do share, Where are ordering your parts from.

 

[Manonabike]

Please do share, Where are ordering your parts from.

Of course, this is their website