I suggest that you go to the Crosman homepage ( they own Benjamin) and click on "Download a manual" there you will find the owners manual and parts diagram for your rifle. See related link.
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I am not sure about the diagram,but I would check at numrich gun parts corp. first for the parts you need.
Send me your email & I'll send you a scan of the diagram. USDF
Go to Numrich Arms website, you can see a parts list and purchase a parts diagram for about anything- www.gunpartscorp.com
You can find a parts diagram on the CROSMAN homepage. Click on "Download a manual" (at the bottom of the page ) There you will find an owners manual and parts diagram for the model 66. Parts are still available through Crosman. See the related link.
Try egunparts
Try egunparts
website for gunpartscorp, letter S, Savage, Model 73, and there is a parts diagram.
THIS IS A CROSMAN. It is a Crosman model 140 or 1400
If you mean the 1936 Johnson Model 100, 1.7 hp, go to www.marineengine.com and look under Johnson manuals. They have a parts manual and diagram for that model for $27.50.
There are books available at most national auto parts stores for your make/model .