I would contact them by e-mail and ask for a manual, their e-mail address is
info@weihrauch-sport.de
Go to the website of the MAKER of your rifle (Hawken is a style, not a brand). You should find an owner's manual you can download, or request a paper copy for free.
I suggest you contact Weihrauch directly and ask them. info@Weihrauch-sport.de
Go to the Henry website, and download the owner's manual for your rifle.
Start by going to the Henry website, and download the manual for your rifle. They are free.
I believe your rifle was made for Montgomery Ward as the Mossberg Mdl 346K. Made from ABOUT 1958-1971, and there was never an "instruction manual". There was an envelope attached to the trigger guard, that held one folded (and very basic) instruction PAGE. The link below will take you to that page.
No known sites.
You can download one from the Browning website.
Go to the website for the maker of the rifle, and download an owner's manual. That will have detailed instructions.
Go to www.crosman.com and click on "Download a manual" you will find you rifle there. It will give you an exploded view of the rifle.
You may be able to find an instruction manual on eBay or Auctionarms.com
From your question, I assume you do not have the owner's manual. The link at the bottom of this page will take you to the Henry website, and you can download the manual.
Browning.com has manuals you can request or download