Noise fron Front Wheel SF1

[mikeringrose]

Hello All,

Whilst waiting for my Mrs who was riding her bike I was ridding very slowing and the bike coughed and cut out...as it does sometimes. As I coasted to a halt I could hear a very nasty grinding noise coming from the front wheel. The noise was surprising loud. Having arrived home I spun the front wheel and could hear the noise. There was no play on the wheel spindle. On removing the wheel I noticed the bronze filings in the speedo drive. The bearing on the speedo drive side was very notchy so is I guess it is knackered.  I could not find any other signs of wear or item that might make a noise in the wheel.

Could a little bit of bearing play cause the speedo drive to wear as shown in the picture? Naturally I will replace both bearings.

Your suggestions are welcome.
Regards
Mike

 

[mikeringrose]

Here is the other part of the speedo drive.

 

[sfcpiet]

Mike,

Bronze shavings will result from the speedo drive worm gear running dry/siezing in the screwed-in bush of the backing plate.  If you're lucky, a bit of cleaning up with fine emery and a blob of grease will see you OK.  Gear teeth look OK to me.  Put a nice fat blob of heat-ressitant grease on the gears when you reasssemble.

Won't do any harm to replace BOTH wheel bearings while you're at it.  Sods' Law states the second bearing will give up within a fortnight of replacing the first...

piet

 

[stevepm2011]

Fully agree with Piet.
Nasty noises from wheelbearings remind me of my student days and Renault 16 TS.
Rear wheel bearings had a life of 120,000 km +- 5 km.
Fortunately, the milling machine at work used the same bearings...