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Seized Front Sprocket.

Discussion in 'Technical Help' started by West Cork Paul, Aug 1, 2019.

  1. Good plan, I couldn’t sleep either. I thought you could lay the bike on its side and clamp around the outside of the sprocket with a small vice, strapped from the ceiling and then suspend the bike on it, with a mattress underneath it for when it eventually falls off.
     
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  2. Maybe best to stay away from the bike for a bit.:)
     
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  3. Clean all the oil and solvents off, smear it in peanut butter and your hamster will soon nibble it off !!
     
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  4. Why can't you rotate the sprocket whilst it is on the shaft? It must turn or there is something wrong with the gear box?
     
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  5. Spark erosion run a lead from nearest lamp post to save your leccy bill
     
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  6. ..........and on the eleventh day god rested;)
     
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  7. I’d be tempted to cut a segment out of the sprocket, a ‘D’ shape with the chord just clear of the output shaft.

    That would warm the sprocket nicely, and would also give a clear view behind the sprocket.

    If it didn’t then drop off I would drill radially into the remains of the boss, or use the dremel for small cuts, progressively reducing the amount of metal attaching it to the output shaft.
     
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  8. Scaffolders used to years ago submerge their clips in diesel to free them up.
     
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  9. Are they free yet? :thinkingface:
     
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  10. No good.

    Paul's bike is petrol-engined.
     
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  11. A lifetime ago:upyeah:
     
  12. Diesel bikes now that's funny:confused:
     
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  13. There's a Stu on here who has a diesel-powered Triumph Tiger.
    Riding around with him was weird - you could hear a London Black Cab behind you, keeping up with you but when you turned around .... it was a bike!

    LOL
     
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  14. Good idea, I’ll drag a mattress into the garage:upyeah:

    Who do you think I am, Freddie Starr:astonished:

    Oh it turns no problem it’s just nigh on impossible to get the Dremel cutting disk in without damaging the casing or the shaft. I gotta come at it from behind (said the Bishop to the Actress;))
    No street lamps or other public supplies around here save the one to the house :confused:

    Keep the ideas coming please :):upyeah:
     
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  15. Look you've cut it twice already, surely you are getting the hang of it by now? Third times a charm!

    Though perhaps drilling is better/ easier/ safer? Starting with a small hole and working up through larger drills. Once you have removed a piece out of the sprocket, it should allow twisting movement and let it come free...
     
    #276 Jez900ie, Aug 11, 2019
    Last edited: Aug 11, 2019
  16. Have you tried to shoot the sprocket in the head?

    It's clearly a zombie-sprocket, a head-shot is the only way.
     
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  17. Scuse me for asking, but has anyone suggested drilling the holes out and tapping them M10, then finding a nice piece of 10mm thick metal and drilling two 10mm holes in it to coincide with the holes in the sprocket. Just right for two M10 socket head bolts to pull the sprocket towards the end of the shaft.????
     
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  18. Use the force,Paul,use the force.
     
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  19. Perhaps you should cut it with a bigger angle grinder, from the front not from the side, no chance of damage to the casing and much easier.
    Vertically close to the side of the shaft.
    Steve
     
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