Never punched tubes on one.

You will likely have to call Trane, and give them the vessel info.

In the future, The easiest way is to have a kit full of different sizes, and restock it after each job.

If you have access to Comfort Site you can find it there or post the serial#

You may need access to ComfortSite. If you don’t have access, a good work around is contacting a local Trane Supply parts-house. Give them a serial #, and they can look up the ID of tube sizes on the evaporator barrel.