Various sections of the Rocketdyne F-1 document R-3896 can be found scattered about the web, but I can't find R-3896-4. It's described as
R-3896-4 F-1 Rocket Engine Illustrated Parts Breakdown
This manual contains illustrative and columnar listings of all parts of the engine that can be disassembled, reassembled, repaired, replaced, or overhauled. This manual locates and identifies the interrelationship of parts, aids in the requisition of replacement parts, and indicates part usage and inter changeability and recommended repair or replacement for the F-1 engine and its individual components and parts.
I am looking for a .pdf of this document.
Screenshot from R-3896-1 INTRODUCTION page xii