Campagnolo C-Record rear hub bearing question
02-07-12, 09:20 AM
#1
十人十色
Thread Starter
Campagnolo C-Record rear hub bearing question
My apologies for the mis-titling of this thread. Since posting this I have been looking through the Campagnolo hubs on VeloBase and see that this hub can't be a C-Record as that is a freewheel hub whereas this is a cassette. I think this hub might be an Athena, a Centaur, a later Chorus or an 8-speed Record. I will look at the hub in daylight and find out.
A friend is having trouble with a rear hub he's servicing - we suspect it might have been taken apart by a PO and reassembled with the wrong parts, or with parts missing.
It was very rough when he got it. He's taken it apart, removed the old grease and reassembled it with new but now the balls won't stay in place on the cassette side. They creep up past the cone and only seem to be stopped from leaving the hub completely by the cassette body. The cone is fixed and bearing pre-load is set on the non-drive side.
I've never seen a cassette Campagnolo hub apart before but the cone in question seems too small for the application. The balls already in the hub measure 6.3mm. It looks to me that with smaller balls the pre-set cone might go further into the hub shell, where it's narrower, and better keep the balls in place but I'm thrashing in the dark here. Here are a couple of photos I took with the little light available - first the hub with the balls climbing over each other:
[IMG]
IMG_0355 by Dawes-man, on Flickr[/IMG]
There are 2 rims visible on the shaft. The top one is the upper edge of a removable sleeve, or spacer, which extends about 1/2" down and sits on the outer end of the cone. As you can see, there's a lot of room between the cone and the barrel of the shell, plenty for the balls to move.
Then the end of the cassette body with 2 of its 3 pawls in place:
[IMG]
IMG_0357 by Dawes-man, on Flickr[/IMG]
When my friend took the hub apart there was grease all over the pawls with the result that they were sticking. I thought grease was to be kept away from pawls and that oil was the right stuff but is this hub different?
As always, any help will be much appreciated.
A friend is having trouble with a rear hub he's servicing - we suspect it might have been taken apart by a PO and reassembled with the wrong parts, or with parts missing.
It was very rough when he got it. He's taken it apart, removed the old grease and reassembled it with new but now the balls won't stay in place on the cassette side. They creep up past the cone and only seem to be stopped from leaving the hub completely by the cassette body. The cone is fixed and bearing pre-load is set on the non-drive side.
I've never seen a cassette Campagnolo hub apart before but the cone in question seems too small for the application. The balls already in the hub measure 6.3mm. It looks to me that with smaller balls the pre-set cone might go further into the hub shell, where it's narrower, and better keep the balls in place but I'm thrashing in the dark here. Here are a couple of photos I took with the little light available - first the hub with the balls climbing over each other:
[IMG]
IMG_0355 by Dawes-man, on Flickr[/IMG]
There are 2 rims visible on the shaft. The top one is the upper edge of a removable sleeve, or spacer, which extends about 1/2" down and sits on the outer end of the cone. As you can see, there's a lot of room between the cone and the barrel of the shell, plenty for the balls to move.
Then the end of the cassette body with 2 of its 3 pawls in place:
[IMG]
IMG_0357 by Dawes-man, on Flickr[/IMG]
When my friend took the hub apart there was grease all over the pawls with the result that they were sticking. I thought grease was to be kept away from pawls and that oil was the right stuff but is this hub different?
As always, any help will be much appreciated.
Last edited by Dawes-man; 02-07-12 at 12:06 PM. Reason: Wrong info.
