John
Guest
The serial number needs to be 4501 or higher. That is the beginning of the series 3 Gleaner rotary machines N5. Most of the fixes were in at that point and little difference from an R5. Depending on the throat style and age depends on which rotary head you need to look for. The upper hooks on the throat are different between the two styles. The RWA on the N5s were not known for reliability. It will handle a 20' flex and an 8 row CH is the limit of the N5. Good luck!