Overbeck 400 IR Grinding Machine (this should also assist with the larger capacity 600 IR). Comprehensive Instruction Manual with 23 Wiring Diagrams and 3 Hydraulic Schematics with a Hydraulic Parts Listing.

Overbeck 400 RE Precision Grinding Machine. Comprehensive Instruction Manual.

Overbeck 400 RE-VA Precision Grinding Machine. Comprehensive Instruction Manual with Wiring Diagrams, Hydraulic Schematic and Hydraulic Parts List.

Overbeck Mikro-CNC 400 IR and 600 IR (400-IR and 600-IR) Precision Grinding Machine. Comprehensive Instruction Manual with Wiring Diagrams, Hydraulic Schematic and Hydraulic Parts List.

Precisonlap Camberley. Twin-Wheel 400 Lapping Machine. Operator's Instruction and Maintenance Manual with a separate manual on the General Rules of Practice" for lapping.

Cincinnati 200 Series ML and 200, 300 and 400 Series MI Milling (Model LL) Machines: Service Manual and Illustrated Parts Manual with Exploded Assembly Diagrams. Full-size, large-page Edition. See: http://www.lathes.co.uk/cincinnat2MI

Taiwanese Mill Drills badged as Naerok, Warco, Nu-Tools, Sealey,  Whitecote, Excel, Draper and Ajax, etc. . Although not machine-specific in content, it covers the the "Minor", "Major" and similar variants and, being a double-edition manual, it should help with most versions.