Where is the best place to check for modifications made to a machine?

The best place to check for modifications made to a machine is the machine history record. This record typically contains detailed documentation of all changes, repairs, and modifications that have been performed on the machine throughout its operational life. It acts as a comprehensive log that tracks the evolution of the machine, including upgrades, replacements, parts changes, and any alterations made to improve performance or adapt to new requirements.

In contrast, the owner's manual generally provides guidance for the initial setup, operation, and maintenance of the machine but does not typically include records of modifications. The maintenance cost log focuses on financial aspects and does not detail the specific changes made to the equipment. Inspection reports may highlight the condition and performance of the machine at a given time, but they don't usually document modifications comprehensively. Therefore, for anyone seeking information on what changes have been made to a machine, the machine history record is the most reliable and informative resource.