Clutch Newbie fixing a clutch.

Discussion in 'Transmission / Drivetrain' started by feldeee, Jun 5, 2011.

  1. feldeee

    feldeee New Member

    How do I lock this clutch so it does not rotate? I am trying to disassemble to find a way to re-insert this small pin (shown in pic- I cannot find ANYPLACE beneath the top plate shown with hole that it fits into). Even if back tire is held in place, the middle bolt shown in clutch rotates (I am trying to lock in place to loosen). This has to be a newbie question, so any help appreciated- thanks.
     

    Attached Files:


  2. rustycase

    rustycase Banned

    It looks to be the pivot pin for the shoe... You could use thin screw drivers to manipulated that shoe into the proper position to align it with the hole in the disk. Maybe...

    But just inserting it in there will only assure it floats back out when running, causing some real damage to the cover. (well, I suppose an arc strike on the end of the pin, once installed might hold it???)

    I'd use a pneumatic air impact wrench to spin the bolt out to take it apart.
    Possibly LH thread???

    If you don't have air, transport it to a shop that does... or try an electric or battery op impact... some of them are quite good.

    Good luck
    rc
     
  3. Al.Fisherman

    Al.Fisherman Active Member

    http://s982.photobucket.com/albums/ae309/Ron-Becker/Clutch removal/

    "I'd use a pneumatic air impact wrench to spin the bolt out to take it apart.
    Possibly LH thread???" BAD MOVE.

    Here is the tool if you don't have one.....
    http://www.bikeberry.com/sprocket-removal-tool.html
     
    Last edited: Jun 5, 2011
  4. Bob Mac

    Bob Mac Member

    put a socket on the nut on the other side of the crank
     
  5. Skyliner70cc

    Skyliner70cc Active Member

    Feldee,
    Use an impact wrench spinning counter clockwise to remove the retaining nut that holds the centrifugal clutch on. Coat that pin with a little epoxy before you press it in so it doesn't fall out. It takes a 17mm socket. An impact wrench will unzip that bolt so fast you don't need to worry about the engine rotating..its that quick
     
  6. rustycase

    rustycase Banned

    Oops!
    Alf forgot the NUT before using the fancy tool ! :)

    Is that the recommended tool, Alf? I'll order one tomorrow if you think it's the best deal on one... It's tool-time for me, again. I gotta get bicycle tools, also. A two pin cassette wrench, and the crank puller for square drive cranks on MTB's. Probably also a thin wrench for working on axle nuts so I don't have to grind one down, too.
    I better look for a tool thread heading, or start a thread... Got too many questions!
    Best
    rc
     
  7. rustycase

    rustycase Banned

    Oops!
    Alf forgot the NUT before using the fancy tool ! :)
    Whew! THAT would have been a mess! LoL

    Is that the recommended tool, Alf? I'll order one tomorrow if you think it's the best deal on one... It's tool-time for me, again. I gotta get bicycle tools, also. A two pin cassette wrench, and the crank puller for square drive cranks on MTB's. Probably also a thin wrench for working on axle nuts so I don't have to grind one down, too.
    I better look for a tool thread heading, or start a thread... Got too many questions!
    Best
    rc
     
  8. Al.Fisherman

    Al.Fisherman Active Member

    As cheaply as they are made, that is the proper tool to use. Most kits come with them, at least the ones I've bought. Since they are cheaply made, make sure that the tool is threaded correctly, sometimes they want to cross thread. If that happens, take a 3 corner file to clean the threads up. Yes you can get the nut off with a impact but this tool is needed. The dowel pin will fit in the hole (see pictures) and you can peen it from the back. I'm pretty sure that something like JB wield won't work, but you never know. BY the way when you install the woodruff keys, super glue them into the key way. Makes for a easier instillation. Check around for price..they are all the same..this was the first one I ran across and wasn't concerned about the price as I was the picture.
     
    Last edited: Jun 5, 2011
  9. Al.Fisherman

    Al.Fisherman Active Member

    The removal of the nut has already been covered...I hate to repeat. :grin5:
     
  10. feldeee

    feldeee New Member

    Thanks for all of the replies, I played with it for a week before posting and the pin did not fit in any openings (I could find) underneath it which is why I am taking it apart. I started work on a painting project so it will be a week or so before I get back to the bike. The input is a great help, thanks again.
     
  11. Porkchop

    Porkchop Member

    That tool is of no use with getting out the bolt in question here. Think about it. The bolt head is hexagon, the tool is round. I just looked at a brand new engine with the centrifugal clutch kit on my work bench. If the one in question here is the same as mine, and the photo looks like mine, the gear removal tool is of no value. Impact wrench should do it.
     
    Last edited: Jun 5, 2011
  12. Porkchop

    Porkchop Member

    Here are 2 fresh photos of a centrifugal clutch. You may have to remove the spring holding it all together to get the pin reinserted. And yes, they are inserted from the back side and are "peened" or whatever you call it on the back side only. Strange how your's came out.
     

    Attached Files:

    Last edited: Jun 5, 2011
  13. feldeee

    feldeee New Member

    Direction?

    Perfect shots, and yes- looks exactly like mine. To loosen, is the direction clockwise or counter-clockwise? thanks
     
  14. Al.Fisherman

    Al.Fisherman Active Member

    Removal of the hex head bolt was covered,,Due to the ****..py stock material, I'd go against a impact.. It's easy enough with a wrench or socket. Wedge the gears.

    Photos 37 to 47
    http://s982.photobucket.com/albums/...20HT%20breakdown/?action=view&current=37a.jpg
     
    Last edited: Jun 6, 2011
  15. feldeee

    feldeee New Member

    Now this clutch doesn't look like mine, (although they all work the same, and seem to be coming from the same place- China)
     
  16. Al.Fisherman

    Al.Fisherman Active Member

    Yes they come from China, but they don't work the same...
    You have a mechanical clutch that has to be controlled either by linkage or hydraulic. This is what you find in manual shift cars (3 speed or 4 speed etc). The other is a centrifugal clutch that operates on the RPM of the engine..works similar to that in the automatic transmissions of today's cars. In the end they all provide torque to the rear wheel.
     
    Last edited: Jun 6, 2011
  17. Porkchop

    Porkchop Member

    Standard right hand thread. Counter clockwise to loosen it. Where you have a hex head bolt, mine is just a round head that takes a flat blade screwdriver. There are several other little parts involved in that clutch assembly that you don't, and won't see until you get it apart. They will fall out and get lost if you're not careful. Let me know if you are familiar or not with the assembly. If not, I'll try to get photos and post them after while. Again, the clutch photos I posted last night were taken last night. I have a brand new engine and centrifugal clutch assembly sitting on my work bench. Easy for me to get photos. Just trying to help !
     
    Last edited by a moderator: Dec 15, 2015
  18. rustycase

    rustycase Banned

    I have not yet seen that exact unit yet... what motor is that that has a centrifugal clutch? I'd like to learn a little more abt them.
    rc
     
  19. feldeee

    feldeee New Member

    Thanks again, working on the house has jumped into priority for right now, but no I am not really too familiar with the engines. I just have been figuring it all out as I go along.
     
  20. Porkchop

    Porkchop Member

    Not sure I understand what you're asking here, but I think the answer to your question is, as far as I know all the frame mount China 2 strokes come with a manual clutch. The centrifugal clutch is an add on option/conversion. About $30.00 worth.
     
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