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Old April 22nd, 2008, 20:34   #13
jtjcheng
 
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Join Date: Sep 2007
Location: Vancouver, B.C.
Thank you all very much for your generous and kind help. I sincerely apologize that I have been too busy with lab research work and could not send my thanks earlier.

Yes, the problem is finally solved by cleaning the gun and re-positioning the tappet plate properly. As six4 said, the tappet plate was not moving when I used his suggestion to examine the gun. It was positioned incorrectly that it could not move properly. Adding silicon oil also helped and the gun is running smoothly again.

Thank you all again. I really appreciate your precious assistance.
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