Crosman owns both the Sheridan and Benjamin air gun line of products. Crosman has most all the owners and parts manuals online. You can search through them and find your model. There are two models of the Blue Streak. The CB and the CB9 See the link below for the manuals. Also there is a book "Blue book of airguns 9th edition" that has some more information in it.
If you are looking for a diagram. Crossman (Owns Sheridan) has diagrams on-line on their homepage. See the link below and click on "Download a manual." You will also find the parts diagram on the same page as the owners manual.
I've looked at every reference book I have and can not find a model Sheridan 63-90 Blue Streak. The Blue Streak, As far as I know, is CB9 not 63-90. On the CB9 the serial number is usually on the left side of the barrel just forward of the loading chamber. You may have to move the black rubber piece of plastic clip that covers the barrel.
It's very hard to date a Sheridan rifle. Let me explain. Sheridan started in 1945 and produced single shot air rifles. In 1977 Benjamin air rifle bought Sheridan and continued the line. In 1992 Crosman bought Benjamin. And again kept both names in manufacture. They decided to use Sheridan on the 20 caliber rifles and Benjamin on the .177 and .22 caliber rifles and air guns. At one point you could find both names on the rifles. In 1995 they came out with the C9 Silver streak model which later added the CB9 Blue streak model. there have been 4 different variations of the Blue streak. It's still made today. Crosman made some changes with their serial numbering system and I can't pinpoint your date of manufacture. See the links below
It is possible to rebuild a Sheridan, But it might be better to locate someone who rebuilds them for a living. Today Crosman owns both the Sheridan and Benjamin line of air gun products. I would do a search on the web for air gun repair or contact crosman at this linkhttps://support.crosman.com/hc/en-us/categories/200223634-Owner-s-Manuals-and-Parts-Diagrams.Crosman has most of their OLD parts manuals online at the link above. This should be a start for you.Also check this sight It will help you locate a repair shop.http://www.crosman.com/general/find-a-service-center
yes.----------------------------------------------------Crosman airgun owns Sheridan and Benjamin. They offer a service to repair or locate a repair center for all their air weapons. Click on the link below, and go to the Crosman web page. Then click on "Find a service center." at the bottom of the page. It will take you to a page to help you locate a repair center.
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 co owns Benjamin and Sheridan. They supply parts for current and some older model Benjamin air rifles or they offer a service to locate someone who repairs older Benjamin rifles. See the link below. When it opens click on "Find a service center."
Crosman owns both Sheridan and Benjamin line of air guns/rifles. Crosman has MOST all of the Owners and Parts manuals online. They even offer a free service to locate shops that repair older Benjamin, Sheridan and Crosman air guns. See the links below.
Crosman owns the Sheridan line of air guns. They offer a service to locate shops that repair older products. See this link. http://www.crosman.com/general/find-a-service-center
Crosman corp took over Benjamin Sheardon a long time ago. Fortunately they offer manuals on almost all of their rifles that they have made. The Silver Streak is part of the "C9" series of rifles. Go towww.crosman.com and click on "Download a manual" and select the "Benjamin Sheardon" section of manuals. You will find your rifle there. see the related link
The Sheridan Silver streak takes a 20 Caliber Pellet. You can find them at a good sporting good store or online (see the link below). Remember a heaver pellet will fly slower but it will fly straighter and have more "knock down power" than a fast light weight pellet that is more affected by crosswind.