Ribble Ale - Failed Freehub, what's a reasonable response?

[IanSmithCSE]

Good morning

OK, The metal annular ring was undamaged and the three white plastic pinions in your last picture look fine - so what was the fault that you found? Pawls?

I can't find the fault as I haven't yet worked out now to separate the freehub from the mounting plate.

The motor unit is not like a normal freehub body attached to the hub, the unit achieves freewheeling by a freehub being permanently attached to a cover plate which is screwed to the toothed ring.

If you look again at the left picture you will see that there is a wheel bearing in the cover plate that covers access to whatever pawling mechanism exists. You can hold the coverplate and drive/freewheel the hub, that is where the action takes place, not further in after the coverplate is attached to the motor.

Bye

Ian

 

[Espresso vecchio]

Yes, I understand what you say in your last post, ie that the pawl action is out of sight in the part you have unscrewed with your (expensive!) tools this morning, ie between the inner face of the bearing in your first picture and under the outer surface of the hub as viewed from the right hand side of the bike. That is exactly what the YouTube clip shows in your penultimate post (post 74 above). Surely the outer part of the whole piece is held by the 3 simple screws which you unscrewed as per the video to get the spanner on, ie onto the inner, screwed part of the piece you have removed. In the advert for the new part, the recessed holes for 3 flat-headed screws are clearly visible - as in the picture I'm attaching - just as the annular ring is attached on the inner face by another three screws shown in the pic of the new part you have bought.

I think the cover plate youve taken off is made up of two halves (I can't tell from your picture of your original piece but are the splines still part of it?). As you seem to have removed the two sets of 3 screws already, is it possible that the two halves of the whole piece (the outer side with the splines and the other half with the screw thread to screw the whole onto the hub body) now just need a slight tap to un-mate them if they are just lightly stuck together by time? I would not have thought that a press would have been used to put them together. I can't see how it would be possible to put in the pawls otherwise, even if it really is a one-piece cover plate into which the bearing was pushed. German engineers design things in a better way than that.

What happens when you turn the splines on your piece compared with the new part?

It sounds a very bad idea to spray WD40 or whatever into the bearing. Much better all round to inspect the pawls and springs and to clean them