I suggest you try this web page. BTW Crosman owns both Benjamin and Sheridan air gun products. You can also contact Crosman and ask for help.https://support.crosman.com/hc/en-us/sections/200649600-Benjamin-and-Sheridan-Air-Pistols
This is the best I can do. (see the link below)
Crosman owns Benjamin. Crosman offers a service to locate air gun repair shops that repair older air guns. See the link below
Contact Daisy directly (Customer Service) and select the parts manual. See the link below.
Crosman airgun owns the Benjamin line of airguns. They off a locater service for shops that repair old air guns and rifles. (See the link below ) when the Crosman page opens, click on the "find a service center" link at the bottom of the page.
It would help if you stated the model. So here is what I can do. Crosman owns Benjamin air guns, they offer a service to locate repair shops that repair older Benjamin products. See the link below.
Crosman air gun Owns both Benjamin and Sheridan brand air guns and rifles. On the Crosman web page they offer owners manuals and parts manuals for MOST of their products. I searched and the 3100 is NOT listed. However I found a reference (In a Bluebook of airguns) that the Benjamin 1300 pump pistol is very similar in design. (See the link Below for the Owners and parts manual for the Benjamin 1300 pistol.) This may help you. Your other option is to go to the Crosman web page. They offer a service to locate repair shops that repair Crosman products ( See link below)
Crosman offers a service to locate repair shops the repair older Crosman, Benjamin and Sheridan air guns. See the link below
Crosman Owns Sheridan Airguns along with Benjamin airguns. They offer a service to locate repair shops that repair older Crosman, Sheridan and Benjamin air guns. See the link below
Crosman Corp owns Benjamin Air guns. The name Benjamin Franklin was a marketing ploy to sell the guns. Benjamin Franklin had nothing to do with it. Older air guns are no longer repaired by Crosman however they offer a service to find independent repair shops that do service and repair on older air guns and rifles. Go to the link listed below, Click on "find a service center" when the link opens
Crosman airgun company owns Benjamin air guns along with Sheridan air guns. Crosman offers a service to locate repair shops that repair older air guns and rifles. Go the the Crosman link below and when it opens, click on "find a service center" at the bottom of the page. It will help you locate someone to assist you. ALSO on the same Crosman home page you will find "Download a manual" Crosman still has manuals available for download. The 122 is part of the 100 series of air guns, so when you find the Benjamin manual for the model 100 download it. It's the same manual for the 122.
Crosman air gun company owns both the Benjamin and Sheridan line of air gun products. They offer a web page to locate independent repair shops that repair air guns see the link below.http://www.crosman.com/general/find-a-service-center
Yes: Crosman airgun Co owns Benjamin. They off a service to locate repair shops that repair older guns and rifles. See the link below and click on "find a service center" at the bottom of the Crosman home page when it opens. The 310 was part of a series of Benjamin models 310, 312 & 317. Made between 1940-1969