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Bell spur gear rubbing

Discussion in 'HPI Savage' started by Zep71, Nov 13, 2017.

  1. Zep71

    Zep71 Active Member

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    hey guys Please help me i upgraded slipper bell and spur gear its seems like the bell rubs on the spur gear. Please take a look if this picture shows up.
     

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  2. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    Looks like the clutch bell is out a bit far to me, did you put the shims in the right places or perhaps the bell is a bit taller than your stock one was? I would pull the :ercm: and check if the bearings are seated and the height of the 2 bells.... some do need to be shimmed more than others, but the inside of the bell should be close to the flywheel and have just enuff not to rub....
     
  3. Zep71

    Zep71 Active Member

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    should the bell fit tighter to the fly wheel i it has a 3 shoe clutch, i pushed them down tight but i can't seem to make the bell tighter to the flywheel
     
  4. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    [​IMG]

    [​IMG]

    [​IMG]

    see in my pics how it is setup, I am using an XL clutch set in mine and there is just a slight bit of room between the bell and the flywheel.... did you also change the collet on the flywheel, some are longer than others and will push the bell out like that, or if you have shims between the inner bearing and the collet nut it will do the same thing.....
     
  5. Zep71

    Zep71 Active Member

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    i was thinking it should be closer when you say shimmed you mean on the end of the bell where the screw is?
     
  6. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    Things to look for are if you used a new flywheel nut or collet make sure they are the same height, and the bell should sit just at or very near the lip where the shoes ride on the flywheel...
     
  7. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    no. shims are going to be behind the inside bearing on the bell side, maybe a couple when you take off the bell, they will be on the inside end of the crankshaft nearest the flywheel, as in my last pic you can see the nut holding on the flywheel, if there are shims there remove them and then slide on the bell and see if it fits better....

    Posting a couple of well lit clear pics may help us see what you have
     
  8. Zep71

    Zep71 Active Member

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    when i remove this barring the bell sits a good bit closer what do i need to do?
     

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  9. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    Does that inside bearing fit snugly on the shaft, it looks to be kinda crooked in that blurry pic ??
     
  10. Zep71

    Zep71 Active Member

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  11. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    The shoes look to be seated and all, but something about that inside bearing does not look right, either the flywheel nut is out too far or is different than stock I can not tell by your pictures...
    I use Photobucket to host my pictures and then just copy IMG and paste into the forum so the pic shows full size....
     
  12. Zep71

    Zep71 Active Member

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    i am lost at this time if you click the picture you will get full size
     
  13. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    I did check the first and second pic by making them full size, but the first pic IS quite blurry and difficult to see well enough...
    well the only thing you can do is take it all apart and check and recheck, did you change the flywheel nut or not,? how about the brass collet under the flywheel? as I stated above there are differences in both at times and it is easy to check....

    are there any shims under the inside bearing as I asked above also ? in your second pic there is quite a large gap until the bell is close enough to the flywheel where the shoes ride at so I think your trouble lies somewhere in that area.....
     
  14. Zep71

    Zep71 Active Member

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    this shows where the barring sits
     

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  15. Zep71

    Zep71 Active Member

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    the truck came with a Picco .26 that had a bad connecting rod so i got the dynamite put the flywheel the nut and the little cone shaped brass all came off the original motor when i got it.
     
  16. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    Better, I do not see any shims but the flywheel nut does look to be a bit far out there... is the nut tight all the way??

    you should measure both Crankends also to make sure they are the same length... there are differences in engines at times and you need to make sure they match up,
     
  17. Zep71

    Zep71 Active Member

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    Thank you that's solid advice i am going to pull the clutch off, here is where the problem lies. i don't know what i should even look for
     
  18. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    See how it just turned from a simple bell alignment problem to a possible issue with the crankshaft or something different in engines, there could be a longer snout on the Dynamite engine VS the Picco engine.... without clear pics of both it is going to be difficult to diagnose from my position.....
     
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  19. Zep71

    Zep71 Active Member

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    let me see what i can do to get pictures
     
  20. Zep71

    Zep71 Active Member

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    the picco shaft is a little shorter i found another nut not sure if it would fix the problem
     
  21. Zep71

    Zep71 Active Member

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    I have just tried photobucket i keep getting an error
     
  22. Zep71

    Zep71 Active Member

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    The nut on the left is the one that was on there the one on the right was in the spare parts i got with it.
     

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  23. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    to use Photobucket you must first register and then make an album to store your pics inside, then select IMG and copy then paste into your post
     
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  24. Jam Racing 1

    Jam Racing 1 NPTB Monitor, Master of the known universe.... HPISF Staff

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    Use the right one and reassemble as needed
     
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  25. Zep71

    Zep71 Active Member

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    could i have put that nut upside down i know the cone end was up
     
  26. Zep71

    Zep71 Active Member

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    Broke one of the clutch springs time to call it a day
     
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  27. Zep71

    Zep71 Active Member

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    I spend more time working on this savage then running it. after going over the manual i now see the shims and washers needed. i got the part numbers and ordered those. i will get it right one of these times. oh yea clutch springs to. i have a stock motor Savage 21 i got last week loads of parts for that on the way. should be busy after all parts show up.
     
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  28. Zep71

    Zep71 Active Member

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    I just want to say thank you to Jam Racing 1!! you pointed me in the correct direction seem to me the bell is going to sit in the correct position after changing the nut. i have to wait for the clutch spring and shims to put it back together.maybe i can get some run time after all this.
     
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  29. olds97_lss

    olds97_lss Well-Known Member

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    In a pinch, I've ground down the back of the nut to make it thinner. Sometimes you have room for this. However, in some instances, the threads on the crank stick out of the nut already and you can't get the bearing down far enough because it hits the threads. That said, I haven't had one yet that had the threads so long as to not be able to shim it to get it to fit ok.
     
  30. Zep71

    Zep71 Active Member

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    hey Guys thanks to Jam Racing 1 he figured out that the nut that holds the flywheel one was not right. it turns out he was right it was to long. i replaced it with a shorter one put it back together and it worked great.i could have saved a bunch of spur gears had i known what Jam Racing 1 knows. now its a matter of tuning it up if the rain ever stops.
     
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