MEP-006A Exciter Diodes
Here are the two diodes I selected to replace the failed ones in my MEP-006A Military 60kW generator.
You would need x3 of each and I recommend getting a spare if you aren’t familiar with proper torque and are prone to breaking studs off components. One is a reverse connection of the other (designed 1NxxxxR)
Three of one type are on one side of the aluminium rectifier mount, and the other three are on the other side. Make sure you use plenty of thermal conduction grease when making the connection.