848 Shock Bottom Bolt Removal

Discussion in 'Technical Help' started by terryphukwit, May 5, 2022.

  1. Rattle gun reqd ....
     
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  2. Its standard problem ....myself and countless others have seen this ...although greased and correctly torqued up ....needs shocking off.
    It's not due to corrosion usually. ...they just do this.
     
    #62 Gerr, Jun 17, 2022
    Last edited: Jun 17, 2022
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  3. Thanks, rattle gun did not help, I have a friend works at a bus garage, they have big inch drive breaker bars and scaffold poles..
     
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  4. Oh .......you are having a bit of a mare with this little bugger aren't you .....view it as bonding ...you'll win ....
     
  5. At Donington Park a week or two back we had an amusing 45 minutes watching the tyre guys trying to get the rear off a Pani 1199. 6 of them. 6 foot scaffolding pole. 1m breaker bar. No chance.
    Rattle gun did it after
    Several
    Attempts and about 3 minutes.
    Lesson learned.
     
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  6. ...and never use a ratchet to 'undo', especially at that massive torque. They're not for that...
     
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  7. I know, It was pissed off time, had already broken the bar that I had had for years and had never failed any car driveshaft nuts..Least the Snap On ratchet is under guarantee..
     
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  8. Now that is an impact gun, I recon you should get one free with every new Ducati:joy:
     
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  9. 59554805-74A0-495C-9310-E9B992A9F6E2.jpeg So this helped, a local bus garage came to my rescue.
     
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  10. FE7BFF27-FCF4-450C-9ADC-1CBF0110BB86.jpeg I guess half a desert is fairly standard
     
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  11. D95280AB-8D75-4BC7-96DB-AB5168364332.jpeg And the winner is
     
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  12. Was it closely followed by two more bus garages coming to help?:D
     
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  13. So I have a question.. the rear shock on the 848 has an extended length of 152mm, the standard spring and in fact any replacement spring for this shock is 170mm?? Why? why is the spring then compressed by 20mm before any further preload is applied. I spoke with the K-Tech guys in the paddock while I was at the TT, they say a spring rate is measured from fully relaxed and generally you would only apply 10/20mm of preload, any more and really you should be looking at the next spring up. Any thoughts?
     
  14. Bike is going back together today but if anyone can help I need the torque settings for the rear wheel and the 41mm nut on the drive side. Thanks...
     
  15. Ive just finished what your doing and had a hard time finding the torque settings for wheel side nut and sprocket side as the workshop manuals state 230Nm both sides which is incorrect, that is for 1098 as they have a bigger axle and same size nut either side. I suspected was the same as my 748 at 176Nm wheel side and 156Nm sprocket, but just to make sure I asked Moto Rapido and yes it is. See attached pic they sent me.

    F7E24AA7-AE2A-4AD4-9B02-97772D16889C.jpeg
     
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  16. I also found out after replacing hub bearings and putting spindle and wheel in and just nipping up the hub pinch bolts fairly tight, I had play when rocking wheel. It was only after I had torqued the pinch bolts up to 31Nm the play disappeared, so must have compressed the hub and the needle bearing. Also, before you put in spindle repack with this grease, also recommend by Moto Rapido.
     
  17. This is the grease for the needle bearing on the r/h side sent from Moto Rapido, not the same bike but same principle/bearing type.
     
  18. 5FAF67CD-BB5F-4FE2-B95C-4D9E423203D1.png
     
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