Shimano hub bearing service

[Deleted member 121159]

Has anyone replaced 4 in the picture? I heard removing and re-installing 9 ('Seal ring') isn't a good idea as it gets damaged and sealing becomes poor. Do you replace that as well then?

 

[Cycleops]

The existing can become distorted so you may have to replace it. Don't see how this could become damaged, it's fairly sturdy.

 

[fossyant]

You probably won't find that part separately, so remove carefully. The caged bearings can be replaced with loose ones. TBH check the bearing races and cones for pitting as it's usually too late if the hub is running rough.

 

[Ming the Merciless]

Just replace with loose bearings (one more than caged) and generous dollop of grease. You’ll want 1/4” bearings.

 

[Deleted member 121159]

Thanks for the responses. Didn't realise I could replace it with loose balls. That'd be better for future maintenance.

 

[Deleted member 121159]

SJS seems to carry the seal ring as well as balls in a retainer

 

[fossyant]

Good old SJS

 

[I like Skol]

You might not be able to fit more balls loose!

I thought the same when servicing my son's MTB Shimano rear hub and wondered why one side was caged and one loose. Tried to fit loose balls both sides but actually couldn't get any more in as the nylon retainer was very space efficient.

 

[Deleted member 121159]

You might not be able to fit more balls loose!

I thought the same when servicing my son's MTB Shimano rear hub and wondered why one side was caged and one loose. Tried to fit loose balls both sides but actually couldn't get any more in as the nylon retainer was very space efficient.

Interesting. I might try with both options and see.