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Front axle potential problem?

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McCabe-Thiele (Ted):
I assembled the front axle today - tightened up the assembly - bearings rotate nicely all looks good except if I rotate the speedometer drive hub it feels as if its binding on the outer chrome ring that bolts on top of the drive plate. My original ring was dented so I have fitted a spare one that looks perfectly round.

I can see that the gap between the speedometer drive hub and the chrome ring is not even it feels as though it is binding.

Any pointers as to the cause I'm suspecting the axle could be slightly bent if that's at all possible - seems unlikely looking at the diameter?  Not sure how I could check it myself?

My front spindle has a flat on it to enable tightening of the axle not a hole in the end boss as per DS parts list & parts manual - is this an original fitting?

Update:- I have rotated the drive plate through 180 deg and this seems to have improved the situation substantially  - plus I assembled the spindle - nipped it up - then fitted the long bolts that hold the disc - it looks much more central now visually where the chrome ring is close to the speedo drive unit. I guess I need to fit the front wheel to see how it spins in situ.

Lobo:
Ted, a little unsure of your issue, but am sure it is possible to promote hub binding by mis-instal of the bearings - which only shows up on buttoning up the axle assu. (did you have the bearings out?)

Anyways, a past thread here may be of use?

Cheers.

http://www.sohc.co.uk/index.php/topic,23287.msg209285.html#msg209285

McCabe-Thiele (Ted):
The binding has now gone after spending some time rotating the chrome cover ring to the best position for a uniform gap except for one bit where it narrows but does not catch. The ring is not damaged the photo just makes it look bad due to focus & shadows. It does not feel as though there is a high spot - not now binding.

First photo the gap is pretty even the when I rotate the speedometer drive position it shows how the gap narrows.

gap on drive hub by Macabe Thiele, on Flickr

Below shows how the gap narrows at one point.

narrow gap on hub by Macabe Thiele, on Flickr


Is this anything to fret about - can't get the gap any more even - I do not want to mess with the chrome ring by trying to shave it down?

Arfa:
I wonder if the 13mm (?) AF bolt heads are slightly pushing the chrome ring off centre, perhaps a reduced outer diameter washer underneath would allow enough play to allow better centreing?

McCabe-Thiele (Ted):

--- Quote from: Arfa on December 17, 2021, 04:35:08 PM ---I wonder if the 13mm (?) AF bolt heads are slightly pushing the chrome ring off centre, perhaps a reduced outer diameter washer underneath would allow enough play to allow better centreing?

--- End quote ---
Good shout I have had to use a spanner to keep the hexagon off the ring  - worth a try.

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