On the used press market the price is negotiable; the machine year is not. The most reliable physical evidence of a press real vintage is rarely the nameplate, but the original documentation set that shipped with the machine. Wiring-diagram revision years, parts-catalog fitment and manual print batches are very hard to fake all at once. This checklist is drawn from the collection of OEM documentation we maintain.
- Check the wiring-diagram revision year: Komori LS40 Lithrone diagrams exist in 2003, 2005 and 2006 versions; Roland 700 manuals are split by unit type (AX/PW/EX/FX/JX).
- Check parts-catalog fitment: the Heidelberg CD102 Plus Feeder catalog is a separate volume from the standard feeder.
- Check manual language and batch: the Mitsubishi Diamond 3000C Chinese operation manual dates to 2006.
- Check electrical component brands: KBA Rapida documentation includes ABB AC500 PLC and Control Builder V2.1 guides.
- Check finishing equipment: Polar guillotine fault codes 2001 edition, Stahl folder wiring diagrams 1988 edition.
- Missing documents mean bargaining room: a press without its document set costs at least 10 percent more to keep running.
1. Why documentation dates a press
OEM documents ship with the machine, so revision numbers correlate strongly with the build year. Roland 700 manuals, for example, are divided by unit configuration (700-AX/PW/EX/FX/JX-ML); matching the right volume largely reconstructs the original specification. Komori LS40 Lithrone wiring diagrams from 2003, 2005 and 2006 cover different electrical systems, so the revision page alone places the press in a production batch.
2. Three volumes you cannot skip
A complete set means operation manual, wiring diagrams and parts catalog. Gravure and commercial web presses also need separate registers for auto-register and web-guiding systems such as QTI auto register, E+L web guides and ELTEX electrostatic inking. Count the three volumes first, then match the diagram revision year against the nameplate, and finally verify catalog part numbers against the actual machine.
3. How to use it in negotiation
Complete documents with matching revisions indicate a well-documented service history and support the asking price. If the diagram year is later than the nameplate, or the revision does not match, the press has most likely been rebuilt or re-controlled: ask for modification records and acceptance sheets. There is usually 5 to 10 percent of negotiating room on such machines.
Conclusion: On a used press, the nameplate shows appearance while the documentation shows the truth. Add a documentation count to your inspection list and cross-verify the year through revision numbers; it is the cheapest step, and the hardest one to talk you out of.
