Webra 160 help

[Keith Black]

Thanks Georgie.  What was really surprising to me is that I yanked and pulled and banged to the limits of what I felt wouldn't hurt the engine and all my strength, vice grips, pulling and banging dents on my work bench couldn't pull the wrist pin out. But this little gadget pulled it out of there like it was nothing, even easier than using a drive washer puller. I didn't even need to turn very hard on the butterfly nut.  

Ain't leverage grand!

Keith

----- Original Message ----- 
  From: George Kennie 
  To: discussion at nsrca.org 
  Sent: Wednesday, June 01, 2005 10:00 PM
  Subject: Re: Webra 160 help


  Great idea, Keith. Great shot too, clearly demonstrating the application. Good work! 
  Keith Black wrote: 

      I agree totally with Dave's statement, if you don't use method 1 below you will damage the conrod! BTW, I have had a couple of engines that required "some force" to remove the wrist pin, and others that required more force than I could provide. This lead me creating a simple tool to pry the wrist pin out. Get a long 4 mm screw and a butterfly nut and thread it through a hard flat steel rod.  Screw the end of the 4 mm screw into the wrist pin and then turn the butterfly nut down against the steel rod that is against the exhaust port.  To protect the side of the piston I also put popsicle sticks between the piston and the inside wall of the crank case. This is sort of a reverse gear puller. See picture at link below: http://www.fototime.com/865BF0EA2103D32/orig.jpg Keith Black ----- Original Message ----- 
      From: DaveL322 at comcast.net
      To: discussion at nsrca.org
      Sent: Wednesday, June 01, 2005 9:36 AM
      Subject: Re: Webra 160 help
       1st method is the way to go. If the second method works - it is only because there is enough play in the conrod that the conrod (and/or possibly the wrist pin, or piston) need to be replaced.  The conrod will most certainly need to be replaced if the "pry" method is used. Dave  
        -------------- Original message --------------One way, the way I have done it. Pull the head and the sleeve, the sleeve should slide out; if not I put a wood dowel in the exhaust port and nudge it up using a prop installed then you can grip it and move it out. The sleeve is aluminum so use care. Go in through the exhaust port with a narrow plier or hemostat and remove the circlip holding the wrist pin in the piston, you can do this in a baggy if you dont have a spare circlip cause the clip might get away from you. Then use one of the head bolts and thread it into the wrist pin through the exhaust port and pull the pin, this might take some force depending on how much then engines been ran. If you can clean any crude out thats in the pin area that might help. The piston will come off, the rod will fall off the crank and come out the cylinder. An alternate way that I have heard about is to remove the sleeve and position the rod so you can pry it off the crank leaving the piston and rod together. Brian 
        Wes Stafford <2flyrc at 3states.net> wrote: 

          Hello All, 
          I need help on changing the rear bearing on a Webra 160. How do you 
          remove the rod from the crank? 
          Thanks, 
          Wes 
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