@Dennis Rosenthal, as your 675 is postwar, you can use any of the aforementioned resources to get the complete service set:
@bmoran4 posted:Postwar:
Online: The LCCA/HSL Digital Archive is available to LCCA Members for free and covers all Lionel postwar items.
Book Publication: Greenberg's Repair and Operating Manual for Lionel Trains, 1945–1969
Digital Publication: Olsen's Toy Train Parts has many digital CDs