Perkins 4-107 Zincs

[Alden68]

Does anyone know where the zincs are locate on a 4-107? I have a pencil on the heat exchanger but are there others? The tranny is hydraulic and is cooled with raw water. Shouldn't there be zincs somewhere on the tranny?

The pencil zinc on the heat echanger is conveniently located on the underside of the unit and has almost no access. After many failed attempts to remove it, I am assuming I need to remove the entire exchanger to properly access the zinc. What should I be aware of for this project?

Thanks