This should help.
try www.midwestgunworks.com I found the 101 manual here.
Try Numrich Gunparts for a breakdown and parts list.
http://www.castbullet.com/misc/tdown.htm follow the link & it will show you how
Winchester, Its a very old Rifle, but the 53 was what turned into the model 70, Hince Winchester Model 53 and some pre64 model 70 parts should fit.
Numrich gun parts
The Gun Digest Book Firearms Assembly and Disassembly Part 5 Shotguns has an illustrated description of the model 97 disassembly.
The sears model 6c-22 was made Winchester/ same as Winchester model#490
Made from 1964 to 1981, no further sn breakdown I can find.
E-gunparts.com click on Winchester then 74 at the top you can buy it for about $1.50
Try an appliance parts website. Usually they have schematics and a breakdown of parts for appliances.
I would start my search at Numrich gun parts corp.They may be found on the web.