Basic Restoration Considerations

Know the builder, age, size and as much of the history of the instrument as possible.
Assemble an organ archive containing contracts, correspondence, drawings, and service records. Keep these materials in a safe place.
Keep a permanent and complete log of malfunctions and tuning issues. This information is valuable to both service technicians and restorers. It’s also the primary evidence needed to sell a restoration.
Know the serial number of your blower and blower motor. Keep lubrication records, and maintain a clean, tidy blower room.
Does the instrument bear an OHS citation? Should it?
Has the instrument been modified or altered in any way? Research when and why any changes occurred. Document the provenance of all added mechanisms or pipework. Are the console and switching systems original?
Has the instrument been damaged in any way through inattention, neglect, carelessness or the environment?
Carefully research the credentials, philosophy, and past work of anyone who purports to be an organ restorer.
Consider funding options open to restoration projects that are not necessarily available for new pipe organs.